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Message-Id: <20190311195516.137772-14-sashal@kernel.org>
Date: Mon, 11 Mar 2019 15:54:38 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Yizhuo <yzhai003@....edu>, Tony Lindgren <tony@...mide.com>,
Sasha Levin <sashal@...nel.org>, linux-omap@...r.kernel.org
Subject: [PATCH AUTOSEL 4.20 14/52] ARM: OMAP2+: Variable "reg" in function omap4_dsi_mux_pads() could be uninitialized
From: Yizhuo <yzhai003@....edu>
[ Upstream commit dc30e70391376ba3987aeb856ae6d9c0706534f1 ]
In function omap4_dsi_mux_pads(), local variable "reg" could
be uninitialized if function regmap_read() returns -EINVAL.
However, it will be used directly in the later context, which
is potentially unsafe.
Signed-off-by: Yizhuo <yzhai003@....edu>
Signed-off-by: Tony Lindgren <tony@...mide.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
arch/arm/mach-omap2/display.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mach-omap2/display.c b/arch/arm/mach-omap2/display.c
index f86b72d1d59e..1444b4b4bd9f 100644
--- a/arch/arm/mach-omap2/display.c
+++ b/arch/arm/mach-omap2/display.c
@@ -83,6 +83,7 @@ static int omap4_dsi_mux_pads(int dsi_id, unsigned lanes)
u32 enable_mask, enable_shift;
u32 pipd_mask, pipd_shift;
u32 reg;
+ int ret;
if (dsi_id == 0) {
enable_mask = OMAP4_DSI1_LANEENABLE_MASK;
@@ -98,7 +99,11 @@ static int omap4_dsi_mux_pads(int dsi_id, unsigned lanes)
return -ENODEV;
}
- regmap_read(omap4_dsi_mux_syscon, OMAP4_DSIPHY_SYSCON_OFFSET, ®);
+ ret = regmap_read(omap4_dsi_mux_syscon,
+ OMAP4_DSIPHY_SYSCON_OFFSET,
+ ®);
+ if (ret)
+ return ret;
reg &= ~enable_mask;
reg &= ~pipd_mask;
--
2.19.1
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