From: Kangjie Lu kjlu@umn.edu
[ Upstream commit e08f0761234def47961d3252eac09ccedfe4c6a0 ]
In case ioremap fails, the fix returns -ENOMEM to avoid NULL pointer dereference.
Signed-off-by: Kangjie Lu kjlu@umn.edu 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 --- drivers/media/platform/davinci/vpss.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/media/platform/davinci/vpss.c b/drivers/media/platform/davinci/vpss.c index 3f079ac1b080..be91b0c7d20b 100644 --- a/drivers/media/platform/davinci/vpss.c +++ b/drivers/media/platform/davinci/vpss.c @@ -509,6 +509,11 @@ 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);