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9p: do not overwrite return code when locking fails 

If the remote locking fail, we run a local vfs unlock that should work and
return success to userland when we didn't actually lock at all.  We need
to tell the application that tried to lock that it didn't get it, not that
all went well.

Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>
Cc: Eric Van Hensbergen <ericvh@gmail.com>
Cc: Ron Minnich <rminnich@sandia.gov>
Cc: Latchesar Ionkov <lucho@ionkov.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Dominique Martinet 2015-11-05 18:44:21 -08:00 committed by Linus Torvalds
parent 720abae3d6
commit b64787401f
1 changed files with 2 additions and 1 deletions
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3
fs/9p/vfs_file.c
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@ -231,7 +231,8 @@ out_unlock:
if (res < 0 && fl->fl_type != F_UNLCK) { if (res < 0 && fl->fl_type != F_UNLCK) {
fl_type = fl->fl_type; fl_type = fl->fl_type;
fl->fl_type = F_UNLCK; fl->fl_type = F_UNLCK;
res = posix_lock_file_wait(filp, fl); /* Even if this fails we want to return the remote error */
posix_lock_file_wait(filp, fl);
fl->fl_type = fl_type; fl->fl_type = fl_type;
} }
out: out: