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>
This commit is contained in:
parent
ec0d22e4d5
commit
c2bc0a756b
1 changed files with 11 additions and 3 deletions
|
@ -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;
|
||||
|
|
Reference in a new issue