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| author |   Wang YanQing <udknight@gmail.com> | 2012-03-02 09:45:31 +0800 |
|---|---|---|
| committer |   Florian Tobias Schandinat <FlorianSchandinat@gmx.de> | 2012-03-08 18:13:10 +0000 |
| commit | c2bc0a756b1f98bd712fabe78eb49d7d5ae72075 (patch) | |
| tree | bbfbfd8be4ca41308f3ac768f969b46aec93eb3e /drivers/video/uvesafb.c | |
| parent | video:uvesafb: Fix oops that uvesafb try to execute NX-protected page (diff) | |
| download | linux-dev-c2bc0a756b1f98bd712fabe78eb49d7d5ae72075.tar.xz linux-dev-c2bc0a756b1f98bd712fabe78eb49d7d5ae72075.zip | |
video:uvesafb: notice user when we failed to save hardware state
uvesafb_open may failed to save hardware state when kmalloc failed
in uvesafb_vbe_state_save, we should check this and notice user.
Signed-off-by: Wang YanQing <udknight@gmail.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Diffstat (limited to 'drivers/video/uvesafb.c')
| -rw-r--r-- | drivers/video/uvesafb.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/video/uvesafb.c b/drivers/video/uvesafb.c index f9a670d338d2..1f882ed6ba04 100644 --- a/drivers/video/uvesafb.c +++ b/drivers/video/uvesafb.c @@ -363,7 +363,7 @@ static u8 *uvesafb_vbe_state_save(struct uvesafb_par *par) state = kmalloc(par->vbe_state_size, GFP_KERNEL); if (!state) - return NULL; + return ERR_PTR(-ENOMEM); task = uvesafb_prep(); if (!task) { @@ -1180,9 +1180,17 @@ static int uvesafb_open(struct fb_info *info, int user) { struct uvesafb_par *par = info->par; int cnt = atomic_read(&par->ref_count); + u8 *buf = NULL; - if (!cnt && par->vbe_state_size) - par->vbe_state_orig = uvesafb_vbe_state_save(par); + if (!cnt && par->vbe_state_size) { + buf = uvesafb_vbe_state_save(par); + if (IS_ERR(buf)) { + printk(KERN_WARNING "uvesafb: save hardware state" + "failed, error code is %ld!\n", PTR_ERR(buf)); + } else { + par->vbe_state_orig = buf; + } + } atomic_inc(&par->ref_count); return 0; |