[PATCH] video:uvesafb: notice user when we failed to save hardware state
From: Wang YanQing <udknight@gmail.com>
Date: 2012-03-02 01:45:42
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> --- drivers/video/uvesafb.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-)
diff --git a/drivers/video/uvesafb.c b/drivers/video/uvesafb.c
index e7f69ef..9db3de3 100644
--- a/drivers/video/uvesafb.c
+++ b/drivers/video/uvesafb.c@@ -362,7 +362,7 @@ 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) {
@@ -1172,9 +1172,17 @@ 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;
--
1.7.9.2.315.g25a78