linux/fs/kernfs
Tejun Heo b44b214026 kernfs: add back missing error check in kernfs_fop_mmap()
While updating how mmap enabled kernfs files are handled by lockdep,
9b2db6e189 ("sysfs: bail early from kernfs_file_mmap() to avoid
spurious lockdep warning") inadvertently dropped error return check
from kernfs_file_mmap().  The intention was just dropping "if
(ops->mmap)" check as the control won't reach the point if the mmap
callback isn't implemented, but I mistakenly removed the error return
check together with it.

This led to Xorg crash on i810 which was reported and bisected to the
commit and then to the specific change by Tobias.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-and-bisected-by: Tobias Powalowski <tobias.powalowski@googlemail.com>
Tested-by: Tobias Powalowski <tobias.powalowski@googlemail.com>
References: http://lkml.kernel.org/g/533D01BD.1010200@googlemail.com
Cc: stable <stable@vger.kernel.org> # 3.14
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-04-25 12:25:13 -07:00
..
Kconfig kernfs: add CONFIG_KERNFS 2014-02-07 16:08:57 -08:00
Makefile sysfs, kernfs: add skeletons for kernfs 2013-11-27 13:28:24 -08:00
dir.c kernfs: fix a subdir count leak 2014-04-25 12:25:13 -07:00
file.c kernfs: add back missing error check in kernfs_fop_mmap() 2014-04-25 12:25:13 -07:00
inode.c kernfs: protect lazy kernfs_iattrs allocation with mutex 2014-04-16 11:54:40 -07:00
kernfs-internal.h kernfs: fix kernfs_node_from_dentry() 2014-02-14 14:31:37 -08:00
mount.c Merge 3.14-rc5 into driver-core-next 2014-03-02 20:09:08 -08:00
symlink.c kernfs: remove kernfs_addrm_cxt 2014-02-07 15:42:40 -08:00