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ARM: OMAP2+: Variable "reg" in function omap4_dsi_mux_pads() could be uninitialized

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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@ucr.edu>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Yizhuo 2019-01-25 22:32:20 -08:00 committed by Tony Lindgren
parent 072167d13c
commit dc30e70391
1 changed files with 6 additions and 1 deletions
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7
arch/arm/mach-omap2/display.c
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@ -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, &reg);
ret = regmap_read(omap4_dsi_mux_syscon,
OMAP4_DSIPHY_SYSCON_OFFSET,
&reg);
if (ret)
return ret;
reg &= ~enable_mask;
reg &= ~pipd_mask;