cifs: eliminate the inode argument from cifs_new_fileinfo

It already takes a file pointer. The inode associated with that had damn
well better be the same one we're passing in anyway. Thus, there's no
need for a separate argument here.

Also, get rid of the bogus check for a null pCifsInode pointer. The
CIFS_I macro uses container_of(), and that will virtually never return a
NULL pointer anyway.

Finally, move the setting of the canCache* flags outside of the lock.
Other places in the code don't hold that lock when setting it, so I
assume it's not really needed here either.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Suresh Jayaraman <sjayaraman@suse.de>
Acked-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

3 files changed, 22 insertions, 27 deletions

diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index 781676e9cfc3..ca6a0d9130cb 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -105,8 +105,7 @@ extern u64 cifs_UnixTimeToNT(struct timespec);
 extern struct timespec cnvrtDosUnixTm(__le16 le_date, __le16 le_time,
                                       int offset);
 
-extern struct cifsFileInfo *cifs_new_fileinfo(struct inode *newinode,
-                                __u16 fileHandle, struct file *file,
+extern struct cifsFileInfo *cifs_new_fileinfo(__u16 fileHandle, struct file *file,
                                 struct tcon_link *tlink, __u32 oplock);
 extern int cifs_posix_open(char *full_path, struct inode **pinode,
                                 struct super_block *sb,
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index ce1fa3027b23..36cf3e2ec252 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -131,12 +131,13 @@ cifs_bp_rename_retry:
 }
 
 struct cifsFileInfo *
-cifs_new_fileinfo(struct inode *newinode, __u16 fileHandle, struct file *file,
+cifs_new_fileinfo(__u16 fileHandle, struct file *file,
                   struct tcon_link *tlink, __u32 oplock)
 {
         struct dentry *dentry = file->f_path.dentry;
+        struct inode *inode = dentry->d_inode;
+        struct cifsInodeInfo *pCifsInode = CIFS_I(inode);
         struct cifsFileInfo *pCifsFile;
-        struct cifsInodeInfo *pCifsInode;
 
         pCifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
         if (pCifsFile == NULL)
@@ -158,24 +159,20 @@ cifs_new_fileinfo(struct inode *newinode, __u16 fileHandle, struct file *file,
 
         write_lock(&GlobalSMBSeslock);
         list_add(&pCifsFile->tlist, &(tlink_tcon(tlink)->openFileList));
-        pCifsInode = CIFS_I(newinode);
-        if (pCifsInode) {
-                /* if readable file instance put first in list*/
-                if (file->f_mode & FMODE_READ)
-                        list_add(&pCifsFile->flist, &pCifsInode->openFileList);
-                else
-                        list_add_tail(&pCifsFile->flist,
-                                      &pCifsInode->openFileList);
-
-                if ((oplock & 0xF) == OPLOCK_EXCLUSIVE) {
-                        pCifsInode->clientCanCacheAll = true;
-                        pCifsInode->clientCanCacheRead = true;
-                        cFYI(1, "Exclusive Oplock inode %p", newinode);
-                } else if ((oplock & 0xF) == OPLOCK_READ)
-                                pCifsInode->clientCanCacheRead = true;
-        }
+        /* if readable file instance put first in list*/
+        if (file->f_mode & FMODE_READ)
+                list_add(&pCifsFile->flist, &pCifsInode->openFileList);
+        else
+                list_add_tail(&pCifsFile->flist, &pCifsInode->openFileList);
         write_unlock(&GlobalSMBSeslock);
 
+        if ((oplock & 0xF) == OPLOCK_EXCLUSIVE) {
+                pCifsInode->clientCanCacheAll = true;
+                pCifsInode->clientCanCacheRead = true;
+                cFYI(1, "Exclusive Oplock inode %p", inode);
+        } else if ((oplock & 0xF) == OPLOCK_READ)
+                pCifsInode->clientCanCacheRead = true;
+
         file->private_data = pCifsFile;
 
         return pCifsFile;
@@ -395,8 +392,7 @@ cifs_create_set_dentry:
                         goto cifs_create_out;
                 }
 
-                pfile_info = cifs_new_fileinfo(newinode, fileHandle, filp,
-                                                tlink, oplock);
+                pfile_info = cifs_new_fileinfo(fileHandle, filp, tlink, oplock);
                 if (pfile_info == NULL) {
                         fput(filp);
                         CIFSSMBClose(xid, tcon, fileHandle);
@@ -669,8 +665,8 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry,
                                 goto lookup_out;
                         }
 
-                        cfile = cifs_new_fileinfo(newInode, fileHandle, filp,
-                                                  tlink, oplock);
+                        cfile = cifs_new_fileinfo(fileHandle, filp, tlink,
+                                                  oplock);
                         if (cfile == NULL) {
                                 fput(filp);
                                 CIFSSMBClose(xid, pTcon, fileHandle);
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 774e3ac1208b..394cf28f080d 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -272,8 +272,8 @@ int cifs_open(struct inode *inode, struct file *file)
                 if (rc == 0) {
                         cFYI(1, "posix open succeeded");
 
-                        pCifsFile = cifs_new_fileinfo(inode, netfid, file,
-                                                        tlink, oplock);
+                        pCifsFile = cifs_new_fileinfo(netfid, file, tlink,
+                                                      oplock);
                         if (pCifsFile == NULL) {
                                 CIFSSMBClose(xid, tcon, netfid);
                                 rc = -ENOMEM;
@@ -365,7 +365,7 @@ int cifs_open(struct inode *inode, struct file *file)
         if (rc != 0)
                 goto out;
 
-        pCifsFile = cifs_new_fileinfo(inode, netfid, file, tlink, oplock);
+        pCifsFile = cifs_new_fileinfo(netfid, file, tlink, oplock);
         if (pCifsFile == NULL) {
                 rc = -ENOMEM;
                 goto out;