diff options
author | KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> | 2010-02-02 13:44:05 -0800 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-02-02 18:11:22 -0800 |
commit | 325fda71d0badc1073dc59f12a948f24ff05796a (patch) | |
tree | b143817aba0e8c0d9b4b689bde32fa893a9fb559 /drivers/video/fb_sys_fops.c | |
parent | 931e80e4b3263db75c8e34f078d22f11bbabd3a3 (diff) |
devmem: check vmalloc address on kmem read/write
Otherwise vmalloc_to_page() will BUG().
This also makes the kmem read/write implementation aligned with mem(4):
"References to nonexistent locations cause errors to be returned." Here we
return -ENXIO (inspired by Hugh) if no bytes have been transfered to/from
user space, otherwise return partial read/write results.
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video/fb_sys_fops.c')
0 files changed, 0 insertions, 0 deletions