evie/android_kernel_oneplus_msm8998
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msm: mdss: Fix potential null pointer dereference

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Add NULL checks before accessing potential null pointers.

Change-Id: Ibdecaa7664c21a0acf57a3dd2c473f7407520f6b
Signed-off-by: Raghavendra Ambadas <rambad@codeaurora.org>
This commit is contained in:
raghavendra ambadas 2018-10-08 14:46:33 +05:30 • committed by Gerrit - the friendly Code Review server
parent 3b8fc0b7a3
commit 41a86ae25e
1 changed files with 9 additions and 0 deletions
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9
drivers/video/fbdev/msm/mdss_mdp_overlay.c
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@ -6375,6 +6375,15 @@ void mdss_mdp_footswitch_ctrl_handler(bool on)
static void mdss_mdp_signal_retire_fence(struct msm_fb_data_type *mfd,
int retire_cnt)
{
struct mdss_overlay_private *mdp5_data;
if (!mfd)
return;
mdp5_data = mfd_to_mdp5_data(mfd);
if (!mdp5_data->ctl || !mdp5_data->ctl->ops.remove_vsync_handler)
return;
__vsync_retire_signal(mfd, retire_cnt);
pr_debug("Signaled (%d) pending retire fence\n", retire_cnt);
}