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drm/fb-helper: Do the 'max_conn_count' zero check

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Since we cannot make sure the 'max_conn_count' will always be none
zero from the users, and then if max_conn_count equals to zero, the
kcalloc() will return ZERO_SIZE_PTR, which equals to ((void *)16).

So this patch fix this with just doing the 'max_conn_count' zero check
in the front of drm_fb_helper_init().

Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
CC: Jani Nikula <jani.nikula@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Xiubo Li 2014-03-10 09:33:58 +08:00 committed by Daniel Vetter
parent 409bbf1e3d
commit 04cfe97eb1
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/drm_fb_helper.c
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@ -516,6 +516,9 @@ int drm_fb_helper_init(struct drm_device *dev,
struct drm_crtc *crtc;
int i;
if (!max_conn_count)
return -EINVAL;
fb_helper->dev = dev;
INIT_LIST_HEAD(&fb_helper->kernel_fb_list);