evie/android_kernel_oneplus_msm8998
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msm: mdss: avoid flagging error for retire fence fd

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For cases such as the rotator interface, flags to
indicate retire fence file descriptors are not set.
Do not return error while copying these file descriptors
for such interfaces. This avoids the driver from setting
false positive error flags to user space processes in
usecases where retire fence fd is not present.

CRs-Fixed: 663793
Change-Id: I7918520764c364ee11f469ea757c38ef46bf93cd
Signed-off-by: Manoj Rao <manojraj@codeaurora.org>
This commit is contained in:
Manoj Rao 2014-05-23 16:13:06 -07:00 • committed by David Keitel
parent f02ba80f41
commit fe3b4ba16e
1 changed files with 7 additions and 2 deletions
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9
drivers/video/fbdev/msm/mdss_compat_utils.c
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@ -133,8 +133,13 @@ static int mdss_fb_compat_buf_sync(struct fb_info *info, unsigned int cmd,
return -EFAULT;
if (copy_in_user(compat_ptr(buf_sync32->retire_fen_fd),
buf_sync->retire_fen_fd,
sizeof(int)))
return -EFAULT;
sizeof(int))) {
if (buf_sync->flags & MDP_BUF_SYNC_FLAG_RETIRE_FENCE)
return -EFAULT;
else
pr_debug("%s: no retire fence fd for wb\n",
__func__);
}
return ret;
}