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media: vpss: fix a potential NULL pointer dereference

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[ Upstream commit e08f076123 ]

In case ioremap fails, the fix returns -ENOMEM to avoid NULL
pointer dereference.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Acked-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Kangjie Lu 2019-03-22 22:51:06 -04:00 • committed by Greg Kroah-Hartman
commit 6fb470ace8
1 changed files with 5 additions and 0 deletions
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5
drivers/media/platform/davinci/vpss.c
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@ -518,6 +518,11 @@ static int __init vpss_init(void)
return -EBUSY;
oper_cfg.vpss_regs_base2 = ioremap(VPSS_CLK_CTRL, 4);
if (unlikely(!oper_cfg.vpss_regs_base2)) {
release_mem_region(VPSS_CLK_CTRL, 4);
return -ENOMEM;
}
writel(VPSS_CLK_CTRL_VENCCLKEN |
VPSS_CLK_CTRL_DACCLKEN, oper_cfg.vpss_regs_base2);