From: Jeff Layton Date: Mon, 1 Sep 2014 18:27:43 +0000 (-0400) Subject: locks: remove i_have_this_lease check from __break_lease X-Git-Tag: v5.15~17085^2~5 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=843c6b2f4cef384af8e0de6b7ac7191675030e3a;p=platform%2Fkernel%2Flinux-starfive.git locks: remove i_have_this_lease check from __break_lease I think that the intent of this code was to ensure that a process won't deadlock if it has one fd open with a lease on it and then breaks that lease by opening another fd. In that case it'll treat the __break_lease call as if it were non-blocking. This seems wrong -- the process could (for instance) be multithreaded and managing different fds via different threads. I also don't see any mention of this limitation in the (somewhat sketchy) documentation. Remove the check and the non-blocking behavior when i_have_this_lease is true. Signed-off-by: Jeff Layton --- diff --git a/fs/locks.c b/fs/locks.c index c0f789d..4e8cf5d 100644 --- a/fs/locks.c +++ b/fs/locks.c @@ -1370,7 +1370,6 @@ int __break_lease(struct inode *inode, unsigned int mode, unsigned int type) struct file_lock *new_fl, *flock; struct file_lock *fl; unsigned long break_time; - int i_have_this_lease = 0; bool lease_conflict = false; int want_write = (mode & O_ACCMODE) != O_RDONLY; LIST_HEAD(dispose); @@ -1391,8 +1390,7 @@ int __break_lease(struct inode *inode, unsigned int mode, unsigned int type) for (fl = flock; fl && IS_LEASE(fl); fl = fl->fl_next) { if (leases_conflict(fl, new_fl)) { lease_conflict = true; - if (fl->fl_owner == current->files) - i_have_this_lease = 1; + break; } } if (!lease_conflict) @@ -1422,7 +1420,7 @@ int __break_lease(struct inode *inode, unsigned int mode, unsigned int type) fl->fl_lmops->lm_break(fl); } - if (i_have_this_lease || (mode & O_NONBLOCK)) { + if (mode & O_NONBLOCK) { trace_break_lease_noblock(inode, new_fl); error = -EWOULDBLOCK; goto out;