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authorDavid Howells <dhowells@redhat.com>2008-02-07 03:15:26 -0500
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-07 11:42:26 -0500
commite231c2ee64eb1c5cd3c63c31da9dac7d888dcf7f (patch)
treed4b17ef65960594681397a3acac02c2d248200b5
parentd1bc8e95445224276d7896b8b08cbb0b28a0ca80 (diff)
Convert ERR_PTR(PTR_ERR(p)) instances to ERR_CAST(p)
Convert instances of ERR_PTR(PTR_ERR(p)) to ERR_CAST(p) using: perl -spi -e 's/ERR_PTR[(]PTR_ERR[(](.*)[)][)]/ERR_CAST(\1)/' `grep -rl 'ERR_PTR[(]*PTR_ERR' fs crypto net security` Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--crypto/cbc.c2
-rw-r--r--crypto/cryptd.c4
-rw-r--r--crypto/ecb.c2
-rw-r--r--crypto/hmac.c2
-rw-r--r--crypto/lrw.c2
-rw-r--r--crypto/pcbc.c2
-rw-r--r--crypto/xcbc.c2
-rw-r--r--fs/9p/vfs_inode.c2
-rw-r--r--fs/affs/namei.c2
-rw-r--r--fs/afs/dir.c4
-rw-r--r--fs/afs/security.c2
-rw-r--r--fs/fat/inode.c2
-rw-r--r--fs/fuse/dir.c6
-rw-r--r--fs/gfs2/dir.c2
-rw-r--r--fs/gfs2/ops_export.c2
-rw-r--r--fs/gfs2/ops_inode.c2
-rw-r--r--fs/jffs2/write.c4
-rw-r--r--fs/nfs/getroot.c4
-rw-r--r--fs/nfsd/export.c4
-rw-r--r--fs/quota.c4
-rw-r--r--fs/reiserfs/inode.c2
-rw-r--r--fs/reiserfs/xattr.c4
-rw-r--r--fs/vfat/namei.c2
-rw-r--r--net/rxrpc/af_rxrpc.c6
-rw-r--r--security/keys/key.c2
-rw-r--r--security/keys/process_keys.c2
-rw-r--r--security/keys/request_key.c2
-rw-r--r--security/keys/request_key_auth.c2
28 files changed, 39 insertions, 39 deletions
diff --git a/crypto/cbc.c b/crypto/cbc.c
index 6affff882cf8..61ac42e1e32b 100644
--- a/crypto/cbc.c
+++ b/crypto/cbc.c
@@ -224,7 +224,7 @@ static struct crypto_instance *crypto_cbc_alloc(struct rtattr **tb)
224 alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER, 224 alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER,
225 CRYPTO_ALG_TYPE_MASK); 225 CRYPTO_ALG_TYPE_MASK);
226 if (IS_ERR(alg)) 226 if (IS_ERR(alg))
227 return ERR_PTR(PTR_ERR(alg)); 227 return ERR_CAST(alg);
228 228
229 inst = ERR_PTR(-EINVAL); 229 inst = ERR_PTR(-EINVAL);
230 if (!is_power_of_2(alg->cra_blocksize)) 230 if (!is_power_of_2(alg->cra_blocksize))
diff --git a/crypto/cryptd.c b/crypto/cryptd.c
index 074298f2f8e3..250425263e00 100644
--- a/crypto/cryptd.c
+++ b/crypto/cryptd.c
@@ -230,7 +230,7 @@ static struct crypto_instance *cryptd_alloc_blkcipher(
230 alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_BLKCIPHER, 230 alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_BLKCIPHER,
231 CRYPTO_ALG_TYPE_MASK); 231 CRYPTO_ALG_TYPE_MASK);
232 if (IS_ERR(alg)) 232 if (IS_ERR(alg))
233 return ERR_PTR(PTR_ERR(alg)); 233 return ERR_CAST(alg);
234 234
235 inst = cryptd_alloc_instance(alg, state); 235 inst = cryptd_alloc_instance(alg, state);
236 if (IS_ERR(inst)) 236 if (IS_ERR(inst))
@@ -267,7 +267,7 @@ static struct crypto_instance *cryptd_alloc(struct rtattr **tb)
267 267
268 algt = crypto_get_attr_type(tb); 268 algt = crypto_get_attr_type(tb);
269 if (IS_ERR(algt)) 269 if (IS_ERR(algt))
270 return ERR_PTR(PTR_ERR(algt)); 270 return ERR_CAST(algt);
271 271
272 switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) { 272 switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
273 case CRYPTO_ALG_TYPE_BLKCIPHER: 273 case CRYPTO_ALG_TYPE_BLKCIPHER:
diff --git a/crypto/ecb.c b/crypto/ecb.c
index 6310387a872c..a46838e98a71 100644
--- a/crypto/ecb.c
+++ b/crypto/ecb.c
@@ -128,7 +128,7 @@ static struct crypto_instance *crypto_ecb_alloc(struct rtattr **tb)
128 alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER, 128 alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER,
129 CRYPTO_ALG_TYPE_MASK); 129 CRYPTO_ALG_TYPE_MASK);
130 if (IS_ERR(alg)) 130 if (IS_ERR(alg))
131 return ERR_PTR(PTR_ERR(alg)); 131 return ERR_CAST(alg);
132 132
133 inst = crypto_alloc_instance("ecb", alg); 133 inst = crypto_alloc_instance("ecb", alg);
134 if (IS_ERR(inst)) 134 if (IS_ERR(inst))
diff --git a/crypto/hmac.c b/crypto/hmac.c
index a1d016a50e7d..b60c3c7aa320 100644
--- a/crypto/hmac.c
+++ b/crypto/hmac.c
@@ -213,7 +213,7 @@ static struct crypto_instance *hmac_alloc(struct rtattr **tb)
213 alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_HASH, 213 alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_HASH,
214 CRYPTO_ALG_TYPE_HASH_MASK); 214 CRYPTO_ALG_TYPE_HASH_MASK);
215 if (IS_ERR(alg)) 215 if (IS_ERR(alg))
216 return ERR_PTR(PTR_ERR(alg)); 216 return ERR_CAST(alg);
217 217
218 inst = crypto_alloc_instance("hmac", alg); 218 inst = crypto_alloc_instance("hmac", alg);
219 if (IS_ERR(inst)) 219 if (IS_ERR(inst))
diff --git a/crypto/lrw.c b/crypto/lrw.c
index 621095db28b3..9d52e580d10a 100644
--- a/crypto/lrw.c
+++ b/crypto/lrw.c
@@ -241,7 +241,7 @@ static struct crypto_instance *alloc(struct rtattr **tb)
241 alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER, 241 alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER,
242 CRYPTO_ALG_TYPE_MASK); 242 CRYPTO_ALG_TYPE_MASK);
243 if (IS_ERR(alg)) 243 if (IS_ERR(alg))
244 return ERR_PTR(PTR_ERR(alg)); 244 return ERR_CAST(alg);
245 245
246 inst = crypto_alloc_instance("lrw", alg); 246 inst = crypto_alloc_instance("lrw", alg);
247 if (IS_ERR(inst)) 247 if (IS_ERR(inst))
diff --git a/crypto/pcbc.c b/crypto/pcbc.c
index fe704775f88f..d1b8bdfb5855 100644
--- a/crypto/pcbc.c
+++ b/crypto/pcbc.c
@@ -234,7 +234,7 @@ static struct crypto_instance *crypto_pcbc_alloc(struct rtattr **tb)
234 alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER, 234 alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER,
235 CRYPTO_ALG_TYPE_MASK); 235 CRYPTO_ALG_TYPE_MASK);
236 if (IS_ERR(alg)) 236 if (IS_ERR(alg))
237 return ERR_PTR(PTR_ERR(alg)); 237 return ERR_CAST(alg);
238 238
239 inst = crypto_alloc_instance("pcbc", alg); 239 inst = crypto_alloc_instance("pcbc", alg);
240 if (IS_ERR(inst)) 240 if (IS_ERR(inst))
diff --git a/crypto/xcbc.c b/crypto/xcbc.c
index a82959df678c..86727403e5ab 100644
--- a/crypto/xcbc.c
+++ b/crypto/xcbc.c
@@ -301,7 +301,7 @@ static struct crypto_instance *xcbc_alloc(struct rtattr **tb)
301 alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER, 301 alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER,
302 CRYPTO_ALG_TYPE_MASK); 302 CRYPTO_ALG_TYPE_MASK);
303 if (IS_ERR(alg)) 303 if (IS_ERR(alg))
304 return ERR_PTR(PTR_ERR(alg)); 304 return ERR_CAST(alg);
305 305
306 switch(alg->cra_blocksize) { 306 switch(alg->cra_blocksize) {
307 case 16: 307 case 16:
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 5c5137c11484..6a28842052ea 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -573,7 +573,7 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
573 v9ses = v9fs_inode2v9ses(dir); 573 v9ses = v9fs_inode2v9ses(dir);
574 dfid = v9fs_fid_lookup(dentry->d_parent); 574 dfid = v9fs_fid_lookup(dentry->d_parent);
575 if (IS_ERR(dfid)) 575 if (IS_ERR(dfid))
576 return ERR_PTR(PTR_ERR(dfid)); 576 return ERR_CAST(dfid);
577 577
578 name = (char *) dentry->d_name.name; 578 name = (char *) dentry->d_name.name;
579 fid = p9_client_walk(dfid, 1, &name, 1); 579 fid = p9_client_walk(dfid, 1, &name, 1);
diff --git a/fs/affs/namei.c b/fs/affs/namei.c
index a42143ca0169..b407e9eea3fb 100644
--- a/fs/affs/namei.c
+++ b/fs/affs/namei.c
@@ -209,7 +209,7 @@ affs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
209 bh = affs_find_entry(dir, dentry); 209 bh = affs_find_entry(dir, dentry);
210 affs_unlock_dir(dir); 210 affs_unlock_dir(dir);
211 if (IS_ERR(bh)) { 211 if (IS_ERR(bh)) {
212 return ERR_PTR(PTR_ERR(bh)); 212 return ERR_CAST(bh);
213 } 213 }
214 if (bh) { 214 if (bh) {
215 u32 ino = bh->b_blocknr; 215 u32 ino = bh->b_blocknr;
diff --git a/fs/afs/dir.c b/fs/afs/dir.c
index 0cc3597c1197..b58af8f18bc4 100644
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -512,7 +512,7 @@ static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry,
512 key = afs_request_key(vnode->volume->cell); 512 key = afs_request_key(vnode->volume->cell);
513 if (IS_ERR(key)) { 513 if (IS_ERR(key)) {
514 _leave(" = %ld [key]", PTR_ERR(key)); 514 _leave(" = %ld [key]", PTR_ERR(key));
515 return ERR_PTR(PTR_ERR(key)); 515 return ERR_CAST(key);
516 } 516 }
517 517
518 ret = afs_validate(vnode, key); 518 ret = afs_validate(vnode, key);
@@ -540,7 +540,7 @@ static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry,
540 key_put(key); 540 key_put(key);
541 if (IS_ERR(inode)) { 541 if (IS_ERR(inode)) {
542 _leave(" = %ld", PTR_ERR(inode)); 542 _leave(" = %ld", PTR_ERR(inode));
543 return ERR_PTR(PTR_ERR(inode)); 543 return ERR_CAST(inode);
544 } 544 }
545 545
546 dentry->d_op = &afs_fs_dentry_operations; 546 dentry->d_op = &afs_fs_dentry_operations;
diff --git a/fs/afs/security.c b/fs/afs/security.c
index 566fe712c682..9446a1fd108a 100644
--- a/fs/afs/security.c
+++ b/fs/afs/security.c
@@ -95,7 +95,7 @@ static struct afs_vnode *afs_get_auth_inode(struct afs_vnode *vnode,
95 auth_inode = afs_iget(vnode->vfs_inode.i_sb, key, 95 auth_inode = afs_iget(vnode->vfs_inode.i_sb, key,
96 &vnode->status.parent, NULL, NULL); 96 &vnode->status.parent, NULL, NULL);
97 if (IS_ERR(auth_inode)) 97 if (IS_ERR(auth_inode))
98 return ERR_PTR(PTR_ERR(auth_inode)); 98 return ERR_CAST(auth_inode);
99 } 99 }
100 100
101 auth_vnode = AFS_FS_I(auth_inode); 101 auth_vnode = AFS_FS_I(auth_inode);
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 24c0aaa5ae80..3a3d491bbcfe 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -760,7 +760,7 @@ static struct dentry *fat_get_parent(struct dentry *child)
760 inode = fat_build_inode(child->d_sb, de, i_pos); 760 inode = fat_build_inode(child->d_sb, de, i_pos);
761 brelse(bh); 761 brelse(bh);
762 if (IS_ERR(inode)) { 762 if (IS_ERR(inode)) {
763 parent = ERR_PTR(PTR_ERR(inode)); 763 parent = ERR_CAST(inode);
764 goto out; 764 goto out;
765 } 765 }
766 parent = d_alloc_anon(inode); 766 parent = d_alloc_anon(inode);
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index f56f91bd38be..7fb514b6d852 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -269,12 +269,12 @@ static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
269 269
270 req = fuse_get_req(fc); 270 req = fuse_get_req(fc);
271 if (IS_ERR(req)) 271 if (IS_ERR(req))
272 return ERR_PTR(PTR_ERR(req)); 272 return ERR_CAST(req);
273 273
274 forget_req = fuse_get_req(fc); 274 forget_req = fuse_get_req(fc);
275 if (IS_ERR(forget_req)) { 275 if (IS_ERR(forget_req)) {
276 fuse_put_request(fc, req); 276 fuse_put_request(fc, req);
277 return ERR_PTR(PTR_ERR(forget_req)); 277 return ERR_CAST(forget_req);
278 } 278 }
279 279
280 attr_version = fuse_get_attr_version(fc); 280 attr_version = fuse_get_attr_version(fc);
@@ -1006,7 +1006,7 @@ static char *read_link(struct dentry *dentry)
1006 char *link; 1006 char *link;
1007 1007
1008 if (IS_ERR(req)) 1008 if (IS_ERR(req))
1009 return ERR_PTR(PTR_ERR(req)); 1009 return ERR_CAST(req);
1010 1010
1011 link = (char *) __get_free_page(GFP_KERNEL); 1011 link = (char *) __get_free_page(GFP_KERNEL);
1012 if (!link) { 1012 if (!link) {
diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c
index 57e2ed932adc..c34709512b19 100644
--- a/fs/gfs2/dir.c
+++ b/fs/gfs2/dir.c
@@ -1498,7 +1498,7 @@ struct inode *gfs2_dir_search(struct inode *dir, const struct qstr *name)
1498 dent = gfs2_dirent_search(dir, name, gfs2_dirent_find, &bh); 1498 dent = gfs2_dirent_search(dir, name, gfs2_dirent_find, &bh);
1499 if (dent) { 1499 if (dent) {
1500 if (IS_ERR(dent)) 1500 if (IS_ERR(dent))
1501 return ERR_PTR(PTR_ERR(dent)); 1501 return ERR_CAST(dent);
1502 inode = gfs2_inode_lookup(dir->i_sb, 1502 inode = gfs2_inode_lookup(dir->i_sb,
1503 be16_to_cpu(dent->de_type), 1503 be16_to_cpu(dent->de_type),
1504 be64_to_cpu(dent->de_inum.no_addr), 1504 be64_to_cpu(dent->de_inum.no_addr),
diff --git a/fs/gfs2/ops_export.c b/fs/gfs2/ops_export.c
index b9da62348a87..334c7f85351b 100644
--- a/fs/gfs2/ops_export.c
+++ b/fs/gfs2/ops_export.c
@@ -143,7 +143,7 @@ static struct dentry *gfs2_get_parent(struct dentry *child)
143 * have to return that as a(n invalid) pointer to dentry. 143 * have to return that as a(n invalid) pointer to dentry.
144 */ 144 */
145 if (IS_ERR(inode)) 145 if (IS_ERR(inode))
146 return ERR_PTR(PTR_ERR(inode)); 146 return ERR_CAST(inode);
147 147
148 dentry = d_alloc_anon(inode); 148 dentry = d_alloc_anon(inode);
149 if (!dentry) { 149 if (!dentry) {
diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c
index 9f71372c1757..e87412902bed 100644
--- a/fs/gfs2/ops_inode.c
+++ b/fs/gfs2/ops_inode.c
@@ -111,7 +111,7 @@ static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
111 111
112 inode = gfs2_lookupi(dir, &dentry->d_name, 0, nd); 112 inode = gfs2_lookupi(dir, &dentry->d_name, 0, nd);
113 if (inode && IS_ERR(inode)) 113 if (inode && IS_ERR(inode))
114 return ERR_PTR(PTR_ERR(inode)); 114 return ERR_CAST(inode);
115 115
116 if (inode) { 116 if (inode) {
117 struct gfs2_glock *gl = GFS2_I(inode)->i_gl; 117 struct gfs2_glock *gl = GFS2_I(inode)->i_gl;
diff --git a/fs/jffs2/write.c b/fs/jffs2/write.c
index 147e2cbee9e4..1b88e6e734ef 100644
--- a/fs/jffs2/write.c
+++ b/fs/jffs2/write.c
@@ -177,7 +177,7 @@ struct jffs2_full_dnode *jffs2_write_dnode(struct jffs2_sb_info *c, struct jffs2
177 void *hold_err = fn->raw; 177 void *hold_err = fn->raw;
178 /* Release the full_dnode which is now useless, and return */ 178 /* Release the full_dnode which is now useless, and return */
179 jffs2_free_full_dnode(fn); 179 jffs2_free_full_dnode(fn);
180 return ERR_PTR(PTR_ERR(hold_err)); 180 return ERR_CAST(hold_err);
181 } 181 }
182 fn->ofs = je32_to_cpu(ri->offset); 182 fn->ofs = je32_to_cpu(ri->offset);
183 fn->size = je32_to_cpu(ri->dsize); 183 fn->size = je32_to_cpu(ri->dsize);
@@ -313,7 +313,7 @@ struct jffs2_full_dirent *jffs2_write_dirent(struct jffs2_sb_info *c, struct jff
313 void *hold_err = fd->raw; 313 void *hold_err = fd->raw;
314 /* Release the full_dirent which is now useless, and return */ 314 /* Release the full_dirent which is now useless, and return */
315 jffs2_free_full_dirent(fd); 315 jffs2_free_full_dirent(fd);
316 return ERR_PTR(PTR_ERR(hold_err)); 316 return ERR_CAST(hold_err);
317 } 317 }
318 318
319 if (retried) { 319 if (retried) {
diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c
index e6242cdbaf91..fae97196daad 100644
--- a/fs/nfs/getroot.c
+++ b/fs/nfs/getroot.c
@@ -96,7 +96,7 @@ struct dentry *nfs_get_root(struct super_block *sb, struct nfs_fh *mntfh)
96 inode = nfs_fhget(sb, mntfh, fsinfo.fattr); 96 inode = nfs_fhget(sb, mntfh, fsinfo.fattr);
97 if (IS_ERR(inode)) { 97 if (IS_ERR(inode)) {
98 dprintk("nfs_get_root: get root inode failed\n"); 98 dprintk("nfs_get_root: get root inode failed\n");
99 return ERR_PTR(PTR_ERR(inode)); 99 return ERR_CAST(inode);
100 } 100 }
101 101
102 error = nfs_superblock_set_dummy_root(sb, inode); 102 error = nfs_superblock_set_dummy_root(sb, inode);
@@ -266,7 +266,7 @@ struct dentry *nfs4_get_root(struct super_block *sb, struct nfs_fh *mntfh)
266 inode = nfs_fhget(sb, mntfh, &fattr); 266 inode = nfs_fhget(sb, mntfh, &fattr);
267 if (IS_ERR(inode)) { 267 if (IS_ERR(inode)) {
268 dprintk("nfs_get_root: get root inode failed\n"); 268 dprintk("nfs_get_root: get root inode failed\n");
269 return ERR_PTR(PTR_ERR(inode)); 269 return ERR_CAST(inode);
270 } 270 }
271 271
272 error = nfs_superblock_set_dummy_root(sb, inode); 272 error = nfs_superblock_set_dummy_root(sb, inode);
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 79b4bf812960..346570f6d848 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -1218,13 +1218,13 @@ static struct svc_export *exp_find(struct auth_domain *clp, int fsid_type,
1218 struct svc_export *exp; 1218 struct svc_export *exp;
1219 struct svc_expkey *ek = exp_find_key(clp, fsid_type, fsidv, reqp); 1219 struct svc_expkey *ek = exp_find_key(clp, fsid_type, fsidv, reqp);
1220 if (IS_ERR(ek)) 1220 if (IS_ERR(ek))
1221 return ERR_PTR(PTR_ERR(ek)); 1221 return ERR_CAST(ek);
1222 1222
1223 exp = exp_get_by_name(clp, ek->ek_mnt, ek->ek_dentry, reqp); 1223 exp = exp_get_by_name(clp, ek->ek_mnt, ek->ek_dentry, reqp);
1224 cache_put(&ek->h, &svc_expkey_cache); 1224 cache_put(&ek->h, &svc_expkey_cache);
1225 1225
1226 if (IS_ERR(exp)) 1226 if (IS_ERR(exp))
1227 return ERR_PTR(PTR_ERR(exp)); 1227 return ERR_CAST(exp);
1228 return exp; 1228 return exp;
1229} 1229}
1230 1230
diff --git a/fs/quota.c b/fs/quota.c
index 99b24b52bfc8..84f28dd72116 100644
--- a/fs/quota.c
+++ b/fs/quota.c
@@ -341,11 +341,11 @@ static inline struct super_block *quotactl_block(const char __user *special)
341 char *tmp = getname(special); 341 char *tmp = getname(special);
342 342
343 if (IS_ERR(tmp)) 343 if (IS_ERR(tmp))
344 return ERR_PTR(PTR_ERR(tmp)); 344 return ERR_CAST(tmp);
345 bdev = lookup_bdev(tmp); 345 bdev = lookup_bdev(tmp);
346 putname(tmp); 346 putname(tmp);
347 if (IS_ERR(bdev)) 347 if (IS_ERR(bdev))
348 return ERR_PTR(PTR_ERR(bdev)); 348 return ERR_CAST(bdev);
349 sb = get_super(bdev); 349 sb = get_super(bdev);
350 bdput(bdev); 350 bdput(bdev);
351 if (!sb) 351 if (!sb)
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index 195309857e63..57917932212e 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -1536,7 +1536,7 @@ static struct dentry *reiserfs_get_dentry(struct super_block *sb,
1536 if (!inode) 1536 if (!inode)
1537 inode = ERR_PTR(-ESTALE); 1537 inode = ERR_PTR(-ESTALE);
1538 if (IS_ERR(inode)) 1538 if (IS_ERR(inode))
1539 return ERR_PTR(PTR_ERR(inode)); 1539 return ERR_CAST(inode);
1540 result = d_alloc_anon(inode); 1540 result = d_alloc_anon(inode);
1541 if (!result) { 1541 if (!result) {
1542 iput(inode); 1542 iput(inode);
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index a5bd23ce0e46..eba037b3338f 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -155,7 +155,7 @@ static struct dentry *get_xa_file_dentry(const struct inode *inode,
155 155
156 xadir = open_xa_dir(inode, flags); 156 xadir = open_xa_dir(inode, flags);
157 if (IS_ERR(xadir)) { 157 if (IS_ERR(xadir)) {
158 return ERR_PTR(PTR_ERR(xadir)); 158 return ERR_CAST(xadir);
159 } else if (xadir && !xadir->d_inode) { 159 } else if (xadir && !xadir->d_inode) {
160 dput(xadir); 160 dput(xadir);
161 return ERR_PTR(-ENODATA); 161 return ERR_PTR(-ENODATA);
@@ -164,7 +164,7 @@ static struct dentry *get_xa_file_dentry(const struct inode *inode,
164 xafile = lookup_one_len(name, xadir, strlen(name)); 164 xafile = lookup_one_len(name, xadir, strlen(name));
165 if (IS_ERR(xafile)) { 165 if (IS_ERR(xafile)) {
166 dput(xadir); 166 dput(xadir);
167 return ERR_PTR(PTR_ERR(xafile)); 167 return ERR_CAST(xafile);
168 } 168 }
169 169
170 if (xafile->d_inode) { /* file exists */ 170 if (xafile->d_inode) { /* file exists */
diff --git a/fs/vfat/namei.c b/fs/vfat/namei.c
index c28add2fbe95..cd450bea9f1a 100644
--- a/fs/vfat/namei.c
+++ b/fs/vfat/namei.c
@@ -705,7 +705,7 @@ static struct dentry *vfat_lookup(struct inode *dir, struct dentry *dentry,
705 brelse(sinfo.bh); 705 brelse(sinfo.bh);
706 if (IS_ERR(inode)) { 706 if (IS_ERR(inode)) {
707 unlock_kernel(); 707 unlock_kernel();
708 return ERR_PTR(PTR_ERR(inode)); 708 return ERR_CAST(inode);
709 } 709 }
710 alias = d_find_alias(inode); 710 alias = d_find_alias(inode);
711 if (alias) { 711 if (alias) {
diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c
index 5e82f1c0afbb..2d0c29c837f7 100644
--- a/net/rxrpc/af_rxrpc.c
+++ b/net/rxrpc/af_rxrpc.c
@@ -239,7 +239,7 @@ static struct rxrpc_transport *rxrpc_name_to_transport(struct socket *sock,
239 /* find a remote transport endpoint from the local one */ 239 /* find a remote transport endpoint from the local one */
240 peer = rxrpc_get_peer(srx, gfp); 240 peer = rxrpc_get_peer(srx, gfp);
241 if (IS_ERR(peer)) 241 if (IS_ERR(peer))
242 return ERR_PTR(PTR_ERR(peer)); 242 return ERR_CAST(peer);
243 243
244 /* find a transport */ 244 /* find a transport */
245 trans = rxrpc_get_transport(rx->local, peer, gfp); 245 trans = rxrpc_get_transport(rx->local, peer, gfp);
@@ -282,7 +282,7 @@ struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock,
282 trans = rxrpc_name_to_transport(sock, (struct sockaddr *) srx, 282 trans = rxrpc_name_to_transport(sock, (struct sockaddr *) srx,
283 sizeof(*srx), 0, gfp); 283 sizeof(*srx), 0, gfp);
284 if (IS_ERR(trans)) { 284 if (IS_ERR(trans)) {
285 call = ERR_PTR(PTR_ERR(trans)); 285 call = ERR_CAST(trans);
286 trans = NULL; 286 trans = NULL;
287 goto out; 287 goto out;
288 } 288 }
@@ -306,7 +306,7 @@ struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock,
306 306
307 bundle = rxrpc_get_bundle(rx, trans, key, service_id, gfp); 307 bundle = rxrpc_get_bundle(rx, trans, key, service_id, gfp);
308 if (IS_ERR(bundle)) { 308 if (IS_ERR(bundle)) {
309 call = ERR_PTR(PTR_ERR(bundle)); 309 call = ERR_CAST(bundle);
310 goto out; 310 goto out;
311 } 311 }
312 312
diff --git a/security/keys/key.c b/security/keys/key.c
index fdd5ca6d89fc..654d23baf352 100644
--- a/security/keys/key.c
+++ b/security/keys/key.c
@@ -820,7 +820,7 @@ key_ref_t key_create_or_update(key_ref_t keyring_ref,
820 key = key_alloc(ktype, description, current->fsuid, current->fsgid, 820 key = key_alloc(ktype, description, current->fsuid, current->fsgid,
821 current, perm, flags); 821 current, perm, flags);
822 if (IS_ERR(key)) { 822 if (IS_ERR(key)) {
823 key_ref = ERR_PTR(PTR_ERR(key)); 823 key_ref = ERR_CAST(key);
824 goto error_3; 824 goto error_3;
825 } 825 }
826 826
diff --git a/security/keys/process_keys.c b/security/keys/process_keys.c
index 2a0eb946fc7e..c886a2bb792a 100644
--- a/security/keys/process_keys.c
+++ b/security/keys/process_keys.c
@@ -660,7 +660,7 @@ key_ref_t lookup_user_key(struct task_struct *context, key_serial_t id,
660 660
661 key = key_lookup(id); 661 key = key_lookup(id);
662 if (IS_ERR(key)) { 662 if (IS_ERR(key)) {
663 key_ref = ERR_PTR(PTR_ERR(key)); 663 key_ref = ERR_CAST(key);
664 goto error; 664 goto error;
665 } 665 }
666 666
diff --git a/security/keys/request_key.c b/security/keys/request_key.c
index 6381e616c477..5ecc5057fb54 100644
--- a/security/keys/request_key.c
+++ b/security/keys/request_key.c
@@ -389,7 +389,7 @@ struct key *request_key_and_link(struct key_type *type,
389 if (!IS_ERR(key_ref)) { 389 if (!IS_ERR(key_ref)) {
390 key = key_ref_to_ptr(key_ref); 390 key = key_ref_to_ptr(key_ref);
391 } else if (PTR_ERR(key_ref) != -EAGAIN) { 391 } else if (PTR_ERR(key_ref) != -EAGAIN) {
392 key = ERR_PTR(PTR_ERR(key_ref)); 392 key = ERR_CAST(key_ref);
393 } else { 393 } else {
394 /* the search failed, but the keyrings were searchable, so we 394 /* the search failed, but the keyrings were searchable, so we
395 * should consult userspace if we can */ 395 * should consult userspace if we can */
diff --git a/security/keys/request_key_auth.c b/security/keys/request_key_auth.c
index 510f7be73a2d..e42b5252486f 100644
--- a/security/keys/request_key_auth.c
+++ b/security/keys/request_key_auth.c
@@ -261,7 +261,7 @@ struct key *key_get_instantiation_authkey(key_serial_t target_id)
261 current); 261 current);
262 262
263 if (IS_ERR(authkey_ref)) { 263 if (IS_ERR(authkey_ref)) {
264 authkey = ERR_PTR(PTR_ERR(authkey_ref)); 264 authkey = ERR_CAST(authkey_ref);
265 goto error; 265 goto error;
266 } 266 }
267 267
2010-10-21 12:43:24 -0400 committer Greg Kroah-Hartman <gregkh@suse.de> 2010-10-21 12:43:24 -0400 Staging: hv: netvsc: call vmbus_sendpacket directly' href='/cgit/cgit.cgi/litmus-rt.git/commit/drivers/staging/hv/netvsc.c?id=5a4df29058625ce59f549730817961b293f58d49'>5a4df2905862
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/*
 * Copyright (c) 2009, Microsoft Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307 USA.
 *
 * Authors:
 *   Haiyang Zhang <haiyangz@microsoft.com>
 *   Hank Janssen  <hjanssen@microsoft.com>
 */
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/wait.h>
#include <linux/mm.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/slab.h>

#include "hyperv.h"
#include "hyperv_net.h"


/* Globals */
static const char *driver_name = "netvsc";

/* {F8615163-DF3E-46c5-913F-F2D2F965ED0E} */
static const struct hv_guid netvsc_device_type = {
	.data = {
		0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46,
		0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E
	}
};


static struct netvsc_device *alloc_net_device(struct hv_device *device)
{
	struct netvsc_device *net_device;

	net_device = kzalloc(sizeof(struct netvsc_device), GFP_KERNEL);
	if (!net_device)
		return NULL;

	/* Set to 2 to allow both inbound and outbound traffic */
	atomic_cmpxchg(&net_device->refcnt, 0, 2);

	net_device->dev = device;
	device->ext = net_device;

	return net_device;
}

static void free_net_device(struct netvsc_device *device)
{
	WARN_ON(atomic_read(&device->refcnt) != 0);
	device->dev->ext = NULL;
	kfree(device);
}


/* Get the net device object iff exists and its refcount > 1 */
static struct netvsc_device *get_outbound_net_device(struct hv_device *device)
{
	struct netvsc_device *net_device;

	net_device = device->ext;
	if (net_device && atomic_read(&net_device->refcnt) > 1)
		atomic_inc(&net_device->refcnt);
	else
		net_device = NULL;

	return net_device;
}

/* Get the net device object iff exists and its refcount > 0 */
static struct netvsc_device *get_inbound_net_device(struct hv_device *device)
{
	struct netvsc_device *net_device;

	net_device = device->ext;
	if (net_device && atomic_read(&net_device->refcnt))
		atomic_inc(&net_device->refcnt);
	else
		net_device = NULL;

	return net_device;
}

static void put_net_device(struct hv_device *device)
{
	struct netvsc_device *net_device;

	net_device = device->ext;

	atomic_dec(&net_device->refcnt);
}

static struct netvsc_device *release_outbound_net_device(
		struct hv_device *device)
{
	struct netvsc_device *net_device;

	net_device = device->ext;
	if (net_device == NULL)
		return NULL;

	/* Busy wait until the ref drop to 2, then set it to 1 */
	while (atomic_cmpxchg(&net_device->refcnt, 2, 1) != 2)
		udelay(100);

	return net_device;
}

static struct netvsc_device *release_inbound_net_device(
		struct hv_device *device)
{
	struct netvsc_device *net_device;

	net_device = device->ext;
	if (net_device == NULL)
		return NULL;

	/* Busy wait until the ref drop to 1, then set it to 0 */
	while (atomic_cmpxchg(&net_device->refcnt, 1, 0) != 1)
		udelay(100);

	device->ext = NULL;
	return net_device;
}

static int netvsc_destroy_recv_buf(struct netvsc_device *net_device)
{
	struct nvsp_message *revoke_packet;
	int ret = 0;

	/*
	 * If we got a section count, it means we received a
	 * SendReceiveBufferComplete msg (ie sent
	 * NvspMessage1TypeSendReceiveBuffer msg) therefore, we need
	 * to send a revoke msg here
	 */
	if (net_device->recv_section_cnt) {
		/* Send the revoke receive buffer */
		revoke_packet = &net_device->revoke_packet;
		memset(revoke_packet, 0, sizeof(struct nvsp_message));

		revoke_packet->hdr.msg_type =
			NVSP_MSG1_TYPE_REVOKE_RECV_BUF;
		revoke_packet->msg.v1_msg.
		revoke_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID;

		ret = vmbus_sendpacket(net_device->dev->channel,
				       revoke_packet,
				       sizeof(struct nvsp_message),
				       (unsigned long)revoke_packet,
				       VM_PKT_DATA_INBAND, 0);
		/*
		 * If we failed here, we might as well return and
		 * have a leak rather than continue and a bugchk
		 */
		if (ret != 0) {
			dev_err(&net_device->dev->device, "unable to send "
				"revoke receive buffer to netvsp");
			return -1;
		}
	}

	/* Teardown the gpadl on the vsp end */
	if (net_device->recv_buf_gpadl_handle) {
		ret = vmbus_teardown_gpadl(net_device->dev->channel,
			   net_device->recv_buf_gpadl_handle);

		/* If we failed here, we might as well return and have a leak
		 * rather than continue and a bugchk
		 */
		if (ret != 0) {
			dev_err(&net_device->dev->device,
				   "unable to teardown receive buffer's gpadl");
			return -1;
		}
		net_device->recv_buf_gpadl_handle = 0;
	}

	if (net_device->recv_buf) {
		/* Free up the receive buffer */
		free_pages((unsigned long)net_device->recv_buf,
			get_order(net_device->recv_buf_size));
		net_device->recv_buf = NULL;
	}

	if (net_device->recv_section) {
		net_device->recv_section_cnt = 0;
		kfree(net_device->recv_section);
		net_device->recv_section = NULL;
	}

	return ret;
}

static int netvsc_init_recv_buf(struct hv_device *device)
{
	int ret = 0;
	int t;
	struct netvsc_device *net_device;
	struct nvsp_message *init_packet;

	net_device = get_outbound_net_device(device);
	if (!net_device) {
		dev_err(&device->device, "unable to get net device..."
			   "device being destroyed?");
		return -1;
	}

	net_device->recv_buf =
		(void *)__get_free_pages(GFP_KERNEL|__GFP_ZERO,
				get_order(net_device->recv_buf_size));
	if (!net_device->recv_buf) {
		dev_err(&device->device, "unable to allocate receive "
			"buffer of size %d", net_device->recv_buf_size);
		ret = -1;
		goto cleanup;
	}

	/*
	 * Establish the gpadl handle for this buffer on this
	 * channel.  Note: This call uses the vmbus connection rather
	 * than the channel to establish the gpadl handle.
	 */
	ret = vmbus_establish_gpadl(device->channel, net_device->recv_buf,
				    net_device->recv_buf_size,
				    &net_device->recv_buf_gpadl_handle);
	if (ret != 0) {
		dev_err(&device->device,
			"unable to establish receive buffer's gpadl");
		goto cleanup;
	}


	/* Notify the NetVsp of the gpadl handle */
	init_packet = &net_device->channel_init_pkt;

	memset(init_packet, 0, sizeof(struct nvsp_message));

	init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_RECV_BUF;
	init_packet->msg.v1_msg.send_recv_buf.
		gpadl_handle = net_device->recv_buf_gpadl_handle;
	init_packet->msg.v1_msg.
		send_recv_buf.id = NETVSC_RECEIVE_BUFFER_ID;

	/* Send the gpadl notification request */
	ret = vmbus_sendpacket(device->channel, init_packet,
			       sizeof(struct nvsp_message),
			       (unsigned long)init_packet,
			       VM_PKT_DATA_INBAND,
			       VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
	if (ret != 0) {
		dev_err(&device->device,
			"unable to send receive buffer's gpadl to netvsp");
		goto cleanup;
	}

	t = wait_for_completion_timeout(&net_device->channel_init_wait, HZ);
	BUG_ON(t == 0);


	/* Check the response */
	if (init_packet->msg.v1_msg.
	    send_recv_buf_complete.status != NVSP_STAT_SUCCESS) {
		dev_err(&device->device, "Unable to complete receive buffer "
			   "initialzation with NetVsp - status %d",
			   init_packet->msg.v1_msg.
			   send_recv_buf_complete.status);
		ret = -1;
		goto cleanup;
	}

	/* Parse the response */

	net_device->recv_section_cnt = init_packet->msg.
		v1_msg.send_recv_buf_complete.num_sections;

	net_device->recv_section = kmalloc(net_device->recv_section_cnt
		* sizeof(struct nvsp_1_receive_buffer_section), GFP_KERNEL);
	if (net_device->recv_section == NULL) {
		ret = -1;
		goto cleanup;
	}

	memcpy(net_device->recv_section,
		init_packet->msg.v1_msg.
	       send_recv_buf_complete.sections,
		net_device->recv_section_cnt *
	       sizeof(struct nvsp_1_receive_buffer_section));

	/*
	 * For 1st release, there should only be 1 section that represents the
	 * entire receive buffer
	 */
	if (net_device->recv_section_cnt != 1 ||
	    net_device->recv_section->offset != 0) {
		ret = -1;
		goto cleanup;
	}

	goto exit;

cleanup:
	netvsc_destroy_recv_buf(net_device);

exit:
	put_net_device(device);
	return ret;
}


static int netvsc_connect_vsp(struct hv_device *device)
{
	int ret, t;
	struct netvsc_device *net_device;
	struct nvsp_message *init_packet;
	int ndis_version;

	net_device = get_outbound_net_device(device);
	if (!net_device) {
		dev_err(&device->device, "unable to get net device..."
			   "device being destroyed?");
		return -1;
	}

	init_packet = &net_device->channel_init_pkt;

	memset(init_packet, 0, sizeof(struct nvsp_message));
	init_packet->hdr.msg_type = NVSP_MSG_TYPE_INIT;
	init_packet->msg.init_msg.init.min_protocol_ver =
		NVSP_MIN_PROTOCOL_VERSION;
	init_packet->msg.init_msg.init.max_protocol_ver =
		NVSP_MAX_PROTOCOL_VERSION;

	/* Send the init request */
	ret = vmbus_sendpacket(device->channel, init_packet,
			       sizeof(struct nvsp_message),
			       (unsigned long)init_packet,
			       VM_PKT_DATA_INBAND,
			       VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);

	if (ret != 0)
		goto cleanup;

	t = wait_for_completion_timeout(&net_device->channel_init_wait, HZ);

	if (t == 0) {
		ret = -ETIMEDOUT;
		goto cleanup;
	}

	if (init_packet->msg.init_msg.init_complete.status !=
	    NVSP_STAT_SUCCESS) {
		ret = -1;
		goto cleanup;
	}

	if (init_packet->msg.init_msg.init_complete.
	    negotiated_protocol_ver != NVSP_PROTOCOL_VERSION_1) {
		ret = -1;
		goto cleanup;
	}
	/* Send the ndis version */
	memset(init_packet, 0, sizeof(struct nvsp_message));

	ndis_version = 0x00050000;

	init_packet->hdr.msg_type = NVSP_MSG1_TYPE_SEND_NDIS_VER;
	init_packet->msg.v1_msg.
		send_ndis_ver.ndis_major_ver =
				(ndis_version & 0xFFFF0000) >> 16;
	init_packet->msg.v1_msg.
		send_ndis_ver.ndis_minor_ver =
				ndis_version & 0xFFFF;

	/* Send the init request */
	ret = vmbus_sendpacket(device->channel, init_packet,
				sizeof(struct nvsp_message),
				(unsigned long)init_packet,
				VM_PKT_DATA_INBAND, 0);
	if (ret != 0) {
		ret = -1;
		goto cleanup;
	}

	/* Post the big receive buffer to NetVSP */
	ret = netvsc_init_recv_buf(device);

cleanup:
	put_net_device(device);
	return ret;
}

static void netvsc_disconnect_vsp(struct netvsc_device *net_device)
{
	netvsc_destroy_recv_buf(net_device);
}

/*
 * netvsc_device_remove - Callback when the root bus device is removed
 */
int netvsc_device_remove(struct hv_device *device)
{
	struct netvsc_device *net_device;
	struct hv_netvsc_packet *netvsc_packet, *pos;

	/* Stop outbound traffic ie sends and receives completions */
	net_device = release_outbound_net_device(device);
	if (!net_device) {
		dev_err(&device->device, "No net device present!!");
		return -1;
	}

	/* Wait for all send completions */
	while (atomic_read(&net_device->num_outstanding_sends)) {
		dev_err(&device->device,
			"waiting for %d requests to complete...",
			atomic_read(&net_device->num_outstanding_sends));
		udelay(100);
	}

	netvsc_disconnect_vsp(net_device);

	/* Stop inbound traffic ie receives and sends completions */
	net_device = release_inbound_net_device(device);

	/* At this point, no one should be accessing netDevice except in here */
	dev_notice(&device->device, "net device safe to remove");

	/* Now, we can close the channel safely */
	vmbus_close(device->channel);

	/* Release all resources */
	list_for_each_entry_safe(netvsc_packet, pos,
				 &net_device->recv_pkt_list, list_ent) {
		list_del(&netvsc_packet->list_ent);
		kfree(netvsc_packet);
	}

	free_net_device(net_device);
	return 0;
}

static void netvsc_send_completion(struct hv_device *device,
				   struct vmpacket_descriptor *packet)
{
	struct netvsc_device *net_device;
	struct nvsp_message *nvsp_packet;
	struct hv_netvsc_packet *nvsc_packet;

	net_device = get_inbound_net_device(device);
	if (!net_device) {
		dev_err(&device->device, "unable to get net device..."
			   "device being destroyed?");
		return;
	}

	nvsp_packet = (struct nvsp_message *)((unsigned long)packet +
			(packet->offset8 << 3));

	if ((nvsp_packet->hdr.msg_type == NVSP_MSG_TYPE_INIT_COMPLETE) ||
	    (nvsp_packet->hdr.msg_type ==
	     NVSP_MSG1_TYPE_SEND_RECV_BUF_COMPLETE) ||
	    (nvsp_packet->hdr.msg_type ==
	     NVSP_MSG1_TYPE_SEND_SEND_BUF_COMPLETE)) {
		/* Copy the response back */
		memcpy(&net_device->channel_init_pkt, nvsp_packet,
		       sizeof(struct nvsp_message));
		complete(&net_device->channel_init_wait);
	} else if (nvsp_packet->hdr.msg_type ==
		   NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE) {
		/* Get the send context */
		nvsc_packet = (struct hv_netvsc_packet *)(unsigned long)
			packet->trans_id;

		/* Notify the layer above us */
		nvsc_packet->completion.send.send_completion(
			nvsc_packet->completion.send.send_completion_ctx);

		atomic_dec(&net_device->num_outstanding_sends);
	} else {
		dev_err(&device->device, "Unknown send completion packet type- "
			   "%d received!!", nvsp_packet->hdr.msg_type);
	}

	put_net_device(device);
}

int netvsc_send(struct hv_device *device,
			struct hv_netvsc_packet *packet)
{
	struct netvsc_device *net_device;
	int ret = 0;

	struct nvsp_message sendMessage;

	net_device = get_outbound_net_device(device);
	if (!net_device) {
		dev_err(&device->device, "net device (%p) shutting down..."
			   "ignoring outbound packets", net_device);
		return -2;
	}

	sendMessage.hdr.msg_type = NVSP_MSG1_TYPE_SEND_RNDIS_PKT;
	if (packet->is_data_pkt) {
		/* 0 is RMC_DATA; */
		sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 0;
	} else {
		/* 1 is RMC_CONTROL; */
		sendMessage.msg.v1_msg.send_rndis_pkt.channel_type = 1;
	}

	/* Not using send buffer section */
	sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_index =
		0xFFFFFFFF;
	sendMessage.msg.v1_msg.send_rndis_pkt.send_buf_section_size = 0;

	if (packet->page_buf_cnt) {
		ret = vmbus_sendpacket_pagebuffer(device->channel,
						  packet->page_buf,
						  packet->page_buf_cnt,
						  &sendMessage,
						  sizeof(struct nvsp_message),
						  (unsigned long)packet);
	} else {
		ret = vmbus_sendpacket(device->channel, &sendMessage,
				       sizeof(struct nvsp_message),
				       (unsigned long)packet,
				       VM_PKT_DATA_INBAND,
				       VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);

	}

	if (ret != 0)
		dev_err(&device->device, "Unable to send packet %p ret %d",
			   packet, ret);

	atomic_inc(&net_device->num_outstanding_sends);
	put_net_device(device);
	return ret;
}

static void netvsc_send_recv_completion(struct hv_device *device,
					u64 transaction_id)
{
	struct nvsp_message recvcompMessage;
	int retries = 0;
	int ret;

	recvcompMessage.hdr.msg_type =
				NVSP_MSG1_TYPE_SEND_RNDIS_PKT_COMPLETE;

	/* FIXME: Pass in the status */
	recvcompMessage.msg.v1_msg.send_rndis_pkt_complete.status =
		NVSP_STAT_SUCCESS;

retry_send_cmplt:
	/* Send the completion */
	ret = vmbus_sendpacket(device->channel, &recvcompMessage,
			       sizeof(struct nvsp_message), transaction_id,
			       VM_PKT_COMP, 0);
	if (ret == 0) {
		/* success */
		/* no-op */
	} else if (ret == -1) {
		/* no more room...wait a bit and attempt to retry 3 times */
		retries++;
		dev_err(&device->device, "unable to send receive completion pkt"
			" (tid %llx)...retrying %d", transaction_id, retries);

		if (retries < 4) {
			udelay(100);
			goto retry_send_cmplt;
		} else {
			dev_err(&device->device, "unable to send receive "
				"completion pkt (tid %llx)...give up retrying",
				transaction_id);
		}
	} else {
		dev_err(&device->device, "unable to send receive "
			"completion pkt - %llx", transaction_id);
	}
}

/* Send a receive completion packet to RNDIS device (ie NetVsp) */
static void netvsc_receive_completion(void *context)
{
	struct hv_netvsc_packet *packet = context;
	struct hv_device *device = (struct hv_device *)packet->device;
	struct netvsc_device *net_device;
	u64 transaction_id = 0;
	bool fsend_receive_comp = false;
	unsigned long flags;

	/*
	 * Even though it seems logical to do a GetOutboundNetDevice() here to
	 * send out receive completion, we are using GetInboundNetDevice()
	 * since we may have disable outbound traffic already.
	 */
	net_device = get_inbound_net_device(device);
	if (!net_device) {
		dev_err(&device->device, "unable to get net device..."
			   "device being destroyed?");
		return;
	}

	/* Overloading use of the lock. */
	spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags);

	packet->xfer_page_pkt->count--;

	/*
	 * Last one in the line that represent 1 xfer page packet.
	 * Return the xfer page packet itself to the freelist
	 */
	if (packet->xfer_page_pkt->count == 0) {
		fsend_receive_comp = true;
		transaction_id = packet->completion.recv.recv_completion_tid;
		list_add_tail(&packet->xfer_page_pkt->list_ent,
			      &net_device->recv_pkt_list);

	}

	/* Put the packet back */
	list_add_tail(&packet->list_ent, &net_device->recv_pkt_list);
	spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, flags);

	/* Send a receive completion for the xfer page packet */
	if (fsend_receive_comp)
		netvsc_send_recv_completion(device, transaction_id);

	put_net_device(device);
}

static void netvsc_receive(struct hv_device *device,
			    struct vmpacket_descriptor *packet)
{
	struct netvsc_device *net_device;
	struct vmtransfer_page_packet_header *vmxferpage_packet;
	struct nvsp_message *nvsp_packet;
	struct hv_netvsc_packet *netvsc_packet = NULL;
	unsigned long start;
	unsigned long end, end_virtual;
	/* struct netvsc_driver *netvscDriver; */
	struct xferpage_packet *xferpage_packet = NULL;
	int i, j;
	int count = 0, bytes_remain = 0;
	unsigned long flags;

	LIST_HEAD(listHead);

	net_device = get_inbound_net_device(device);
	if (!net_device) {
		dev_err(&device->device, "unable to get net device..."
			   "device being destroyed?");
		return;
	}

	/*
	 * All inbound packets other than send completion should be xfer page
	 * packet
	 */
	if (packet->type != VM_PKT_DATA_USING_XFER_PAGES) {
		dev_err(&device->device, "Unknown packet type received - %d",
			   packet->type);
		put_net_device(device);
		return;
	}

	nvsp_packet = (struct nvsp_message *)((unsigned long)packet +
			(packet->offset8 << 3));

	/* Make sure this is a valid nvsp packet */
	if (nvsp_packet->hdr.msg_type !=
	    NVSP_MSG1_TYPE_SEND_RNDIS_PKT) {
		dev_err(&device->device, "Unknown nvsp packet type received-"
			" %d", nvsp_packet->hdr.msg_type);
		put_net_device(device);
		return;
	}

	vmxferpage_packet = (struct vmtransfer_page_packet_header *)packet;

	if (vmxferpage_packet->xfer_pageset_id != NETVSC_RECEIVE_BUFFER_ID) {
		dev_err(&device->device, "Invalid xfer page set id - "
			   "expecting %x got %x", NETVSC_RECEIVE_BUFFER_ID,
			   vmxferpage_packet->xfer_pageset_id);
		put_net_device(device);
		return;
	}

	/*
	 * Grab free packets (range count + 1) to represent this xfer
	 * page packet. +1 to represent the xfer page packet itself.
	 * We grab it here so that we know exactly how many we can
	 * fulfil
	 */
	spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags);
	while (!list_empty(&net_device->recv_pkt_list)) {
		list_move_tail(net_device->recv_pkt_list.next, &listHead);
		if (++count == vmxferpage_packet->range_cnt + 1)
			break;
	}
	spin_unlock_irqrestore(&net_device->recv_pkt_list_lock, flags);

	/*
	 * We need at least 2 netvsc pkts (1 to represent the xfer
	 * page and at least 1 for the range) i.e. we can handled
	 * some of the xfer page packet ranges...
	 */
	if (count < 2) {
		dev_err(&device->device, "Got only %d netvsc pkt...needed "
			"%d pkts. Dropping this xfer page packet completely!",
			count, vmxferpage_packet->range_cnt + 1);

		/* Return it to the freelist */
		spin_lock_irqsave(&net_device->recv_pkt_list_lock, flags);
		for (i = count; i != 0; i--) {
			list_move_tail(listHead.next,
				       &net_device->recv_pkt_list);
		}
		spin_unlock_irqrestore(&net_device->recv_pkt_list_lock,
				       flags);

		netvsc_send_recv_completion(device,
					    vmxferpage_packet->d.trans_id);

		put_net_device(device);
		return;
	}

	/* Remove the 1st packet to represent the xfer page packet itself */
	xferpage_packet = (struct xferpage_packet *)listHead.next;
	list_del(&xferpage_packet->list_ent);

	/* This is how much we can satisfy */
	xferpage_packet->count = count - 1;

	if (xferpage_packet->count != vmxferpage_packet->range_cnt) {
		dev_err(&device->device, "Needed %d netvsc pkts to satisy "
			"this xfer page...got %d",
			vmxferpage_packet->range_cnt, xferpage_packet->count);
	}

	/* Each range represents 1 RNDIS pkt that contains 1 ethernet frame */
	for (i = 0; i < (count - 1); i++) {
		netvsc_packet = (struct hv_netvsc_packet *)listHead.next;
		list_del(&netvsc_packet->list_ent);

		/* Initialize the netvsc packet */
		netvsc_packet->xfer_page_pkt = xferpage_packet;
		netvsc_packet->completion.recv.recv_completion =
					netvsc_receive_completion;
		netvsc_packet->completion.recv.recv_completion_ctx =
					netvsc_packet;
		netvsc_packet->device = device;
		/* Save this so that we can send it back */
		netvsc_packet->completion.recv.recv_completion_tid =
					vmxferpage_packet->d.trans_id;

		netvsc_packet->total_data_buflen =
					vmxferpage_packet->ranges[i].byte_count;
		netvsc_packet->page_buf_cnt = 1;

		netvsc_packet->page_buf[0].len =
					vmxferpage_packet->ranges[i].byte_count;

		start = virt_to_phys((void *)((unsigned long)net_device->
		recv_buf + vmxferpage_packet->ranges[i].byte_offset));

		netvsc_packet->page_buf[0].pfn = start >> PAGE_SHIFT;
		end_virtual = (unsigned long)net_device->recv_buf
		    + vmxferpage_packet->ranges[i].byte_offset
		    + vmxferpage_packet->ranges[i].byte_count - 1;
		end = virt_to_phys((void *)end_virtual);

		/* Calculate the page relative offset */
		netvsc_packet->page_buf[0].offset =
			vmxferpage_packet->ranges[i].byte_offset &
			(PAGE_SIZE - 1);
		if ((end >> PAGE_SHIFT) != (start >> PAGE_SHIFT)) {
			/* Handle frame across multiple pages: */
			netvsc_packet->page_buf[0].len =
				(netvsc_packet->page_buf[0].pfn <<
				 PAGE_SHIFT)
				+ PAGE_SIZE - start;
			bytes_remain = netvsc_packet->total_data_buflen -
					netvsc_packet->page_buf[0].len;
			for (j = 1; j < NETVSC_PACKET_MAXPAGE; j++) {
				netvsc_packet->page_buf[j].offset = 0;
				if (bytes_remain <= PAGE_SIZE) {
					netvsc_packet->page_buf[j].len =
						bytes_remain;
					bytes_remain = 0;
				} else {
					netvsc_packet->page_buf[j].len =
						PAGE_SIZE;
					bytes_remain -= PAGE_SIZE;
				}
				netvsc_packet->page_buf[j].pfn =
				    virt_to_phys((void *)(end_virtual -
						bytes_remain)) >> PAGE_SHIFT;
				netvsc_packet->page_buf_cnt++;
				if (bytes_remain == 0)
					break;
			}
		}

		/* Pass it to the upper layer */
		rndis_filter_receive(device, netvsc_packet);

		netvsc_receive_completion(netvsc_packet->
				completion.recv.recv_completion_ctx);
	}

	put_net_device(device);
}

static void netvsc_channel_cb(void *context)
{
	int ret;
	struct hv_device *device = context;
	struct netvsc_device *net_device;
	u32 bytes_recvd;
	u64 request_id;
	unsigned char *packet;
	struct vmpacket_descriptor *desc;
	unsigned char *buffer;
	int bufferlen = NETVSC_PACKET_SIZE;

	packet = kzalloc(NETVSC_PACKET_SIZE * sizeof(unsigned char),
			 GFP_ATOMIC);
	if (!packet)
		return;
	buffer = packet;

	net_device = get_inbound_net_device(device);
	if (!net_device) {
		dev_err(&device->device, "net device (%p) shutting down..."
			   "ignoring inbound packets", net_device);
		goto out;
	}

	do {
		ret = vmbus_recvpacket_raw(device->channel, buffer, bufferlen,
					   &bytes_recvd, &request_id);
		if (ret == 0) {
			if (bytes_recvd > 0) {
				desc = (struct vmpacket_descriptor *)buffer;
				switch (desc->type) {
				case VM_PKT_COMP:
					netvsc_send_completion(device, desc);
					break;

				case VM_PKT_DATA_USING_XFER_PAGES:
					netvsc_receive(device, desc);
					break;

				default:
					dev_err(&device->device,
						   "unhandled packet type %d, "
						   "tid %llx len %d\n",
						   desc->type, request_id,
						   bytes_recvd);
					break;
				}

				/* reset */
				if (bufferlen > NETVSC_PACKET_SIZE) {
					kfree(buffer);
					buffer = packet;
					bufferlen = NETVSC_PACKET_SIZE;
				}
			} else {
				/* reset */
				if (bufferlen > NETVSC_PACKET_SIZE) {
					kfree(buffer);
					buffer = packet;
					bufferlen = NETVSC_PACKET_SIZE;
				}

				break;
			}
		} else if (ret == -2) {
			/* Handle large packet */
			buffer = kmalloc(bytes_recvd, GFP_ATOMIC);
			if (buffer == NULL) {
				/* Try again next time around */
				dev_err(&device->device,
					   "unable to allocate buffer of size "
					   "(%d)!!", bytes_recvd);
				break;
			}

			bufferlen = bytes_recvd;
		}
	} while (1);

	put_net_device(device);
out:
	kfree(buffer);
	return;
}

/*
 * netvsc_device_add - Callback when the device belonging to this
 * driver is added
 */
int netvsc_device_add(struct hv_device *device, void *additional_info)
{
	int ret = 0;
	int i;
	int ring_size =
	((struct netvsc_device_info *)additional_info)->ring_size;
	struct netvsc_device *net_device;
	struct hv_netvsc_packet *packet, *pos;

	net_device = alloc_net_device(device);
	if (!net_device) {
		ret = -1;
		goto cleanup;
	}

	/* Initialize the NetVSC channel extension */
	net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE;
	spin_lock_init(&net_device->recv_pkt_list_lock);

	INIT_LIST_HEAD(&net_device->recv_pkt_list);

	for (i = 0; i < NETVSC_RECEIVE_PACKETLIST_COUNT; i++) {
		packet = kzalloc(sizeof(struct hv_netvsc_packet) +
				 (NETVSC_RECEIVE_SG_COUNT *
				  sizeof(struct hv_page_buffer)), GFP_KERNEL);
		if (!packet)
			break;

		list_add_tail(&packet->list_ent,
			      &net_device->recv_pkt_list);
	}
	init_completion(&net_device->channel_init_wait);

	/* Open the channel */
	ret = vmbus_open(device->channel, ring_size * PAGE_SIZE,
			 ring_size * PAGE_SIZE, NULL, 0,
			 netvsc_channel_cb, device);

	if (ret != 0) {
		dev_err(&device->device, "unable to open channel: %d", ret);
		ret = -1;
		goto cleanup;
	}

	/* Channel is opened */
	pr_info("hv_netvsc channel opened successfully");

	/* Connect with the NetVsp */
	ret = netvsc_connect_vsp(device);
	if (ret != 0) {
		dev_err(&device->device,
			"unable to connect to NetVSP - %d", ret);
		ret = -1;
		goto close;
	}

	return ret;

close:
	/* Now, we can close the channel safely */
	vmbus_close(device->channel);

cleanup:

	if (net_device) {
		list_for_each_entry_safe(packet, pos,
					 &net_device->recv_pkt_list,
					 list_ent) {
			list_del(&packet->list_ent);
			kfree(packet);
		}

		release_outbound_net_device(device);
		release_inbound_net_device(device);

		free_net_device(net_device);
	}

	return ret;
}

/*
 * netvsc_initialize - Main entry point
 */
int netvsc_initialize(struct hv_driver *drv)
{

	drv->name = driver_name;
	memcpy(&drv->dev_type, &netvsc_device_type, sizeof(struct hv_guid));

	return 0;
}