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OMAPFB: Fix possible null pointer dereferencing

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Commit 952cbaaa9b8beacc425f9aedf370468cbb737a2c (OMAPFB: Change
dssdev->manager references) added checks for OMAPFB_WAITFORVSYNC ioctl
to verify that the display, output and overlay manager exist. However,
the code erroneously uses && for each part, which means that
OMAPFB_WAITFORVSYNC may crash the kernel if no display, output or
manager is associated with the framebuffer.

This patch fixes the issue by using ||.

Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Tushar Behera 2012-11-19 10:40:15 +05:30 committed by Tomi Valkeinen
parent dffc70ade1
commit c415187b68
1 changed files with 1 additions and 1 deletions
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2
drivers/video/omap2/omapfb/omapfb-ioctl.c
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@ -787,7 +787,7 @@ int omapfb_ioctl(struct fb_info *fbi, unsigned int cmd, unsigned long arg)
case OMAPFB_WAITFORVSYNC:
DBG("ioctl WAITFORVSYNC\n");
if (!display && !display->output && !display->output->manager) {
if (!display || !display->output || !display->output->manager) {
r = -EINVAL;
break;
}