[PATCH] v9fs: handle kthread_create failure, minor bugfixes

- remove unnecessary -ENOMEM assignments
- return correct value when buf_check_size for second time in a buffer
- handle failures when create_workqueue and kthread_create are called
- use kzalloc instead of kmalloc/memset 0
- v9fs_str_copy and v9fs_str_compare were buggy, were used only in one
  place, correct the logic and move it to the place it is used.

Signed-off-by: Latchesar Ionkov <lucho@ionkov.net>
Cc: Eric Van Hensbergen <ericvh@ericvh.myip.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 0 insertions, 10 deletions

diff --git a/fs/9p/9p.c b/fs/9p/9p.c
index dc3ce44ec836..1a6d08761f39 100644
--- a/fs/9p/9p.c
+++ b/fs/9p/9p.c
@@ -86,7 +86,6 @@ v9fs_t_attach(struct v9fs_session_info *v9ses, char *uname, char *aname,
         dprintk(DEBUG_9P, "uname '%s' aname '%s' fid %d afid %d\n", uname,
                 aname, fid, afid);
 
-        ret = -ENOMEM;
         tc = v9fs_create_tattach(fid, afid, uname, aname);
         if (!IS_ERR(tc)) {
                 ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
@@ -136,7 +135,6 @@ v9fs_t_clunk(struct v9fs_session_info *v9ses, u32 fid)
 
         dprintk(DEBUG_9P, "fid %d\n", fid);
 
-        ret = -ENOMEM;
         rc = NULL;
         tc = v9fs_create_tclunk(fid);
         if (!IS_ERR(tc))
@@ -165,7 +163,6 @@ int v9fs_t_flush(struct v9fs_session_info *v9ses, u16 oldtag)
 
         dprintk(DEBUG_9P, "oldtag %d\n", oldtag);
 
-        ret = -ENOMEM;
         tc = v9fs_create_tflush(oldtag);
         if (!IS_ERR(tc)) {
                 ret = v9fs_mux_rpc(v9ses->mux, tc, NULL);
@@ -221,7 +218,6 @@ v9fs_t_wstat(struct v9fs_session_info *v9ses, u32 fid,
 
         dprintk(DEBUG_9P, "fid %d\n", fid);
 
-        ret = -ENOMEM;
         tc = v9fs_create_twstat(fid, wstat, v9ses->extended);
         if (!IS_ERR(tc)) {
                 ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
@@ -259,7 +255,6 @@ v9fs_t_walk(struct v9fs_session_info *v9ses, u32 fid, u32 newfid,
         else
                 nwname = 0;
 
-        ret = -ENOMEM;
         tc = v9fs_create_twalk(fid, newfid, nwname, &name);
         if (!IS_ERR(tc)) {
                 ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
@@ -289,7 +284,6 @@ v9fs_t_open(struct v9fs_session_info *v9ses, u32 fid, u8 mode,
 
         dprintk(DEBUG_9P, "fid %d mode %d\n", fid, mode);
 
-        ret = -ENOMEM;
         tc = v9fs_create_topen(fid, mode);
         if (!IS_ERR(tc)) {
                 ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
@@ -317,7 +311,6 @@ v9fs_t_remove(struct v9fs_session_info *v9ses, u32 fid,
 
         dprintk(DEBUG_9P, "fid %d\n", fid);
 
-        ret = -ENOMEM;
         tc = v9fs_create_tremove(fid);
         if (!IS_ERR(tc)) {
                 ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
@@ -349,7 +342,6 @@ v9fs_t_create(struct v9fs_session_info *v9ses, u32 fid, char *name,
         dprintk(DEBUG_9P, "fid %d name '%s' perm %x mode %d\n",
                 fid, name, perm, mode);
 
-        ret = -ENOMEM;
         tc = v9fs_create_tcreate(fid, name, perm, mode);
         if (!IS_ERR(tc)) {
                 ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
@@ -380,7 +372,6 @@ v9fs_t_read(struct v9fs_session_info *v9ses, u32 fid, u64 offset,
         dprintk(DEBUG_9P, "fid %d offset 0x%llux count 0x%x\n", fid,
                 (long long unsigned) offset, count);
 
-        ret = -ENOMEM;
         tc = v9fs_create_tread(fid, offset, count);
         if (!IS_ERR(tc)) {
                 ret = v9fs_mux_rpc(v9ses->mux, tc, &rc);
@@ -418,7 +409,6 @@ v9fs_t_write(struct v9fs_session_info *v9ses, u32 fid, u64 offset, u32 count,
         dprintk(DEBUG_9P, "fid %d offset 0x%llux count 0x%x\n", fid,
                 (long long unsigned) offset, count);
 
-        ret = -ENOMEM;
         tc = v9fs_create_twrite(fid, offset, count, data);
         if (!IS_ERR(tc)) {
                 ret = v9fs_mux_rpc(v9ses->mux, tc, &rc);