linux-kernel - [PATCH AUTOSEL 5.5 095/542] backlight: qcom-wled: Fix unsigned comparison to zero

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Message-Id: <20200214154854.6746-95-sashal@kernel.org>
Date:   Fri, 14 Feb 2020 10:41:27 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Chen Zhou <chenzhou10@...wei.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Kiran Gunda <kgunda@...eaurora.org>,
        Lee Jones <lee.jones@...aro.org>,
        Sasha Levin <sashal@...nel.org>, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org
Subject: [PATCH AUTOSEL 5.5 095/542] backlight: qcom-wled: Fix unsigned comparison to zero

From: Chen Zhou <chenzhou10@...wei.com>

[ Upstream commit 7af43a76695db71a57203793fb9dd3c81a5783b1 ]

Fixes coccicheck warning:
./drivers/video/backlight/qcom-wled.c:1104:5-15:
	WARNING: Unsigned expression compared with zero: string_len > 0

The unsigned variable string_len is assigned a return value from the call
to of_property_count_elems_of_size(), which may return negative error code.

Fixes: 775d2ffb4af6 ("backlight: qcom-wled: Restructure the driver for WLED3")
Signed-off-by: Chen Zhou <chenzhou10@...wei.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>
Reviewed-by: Daniel Thompson <daniel.thompson@...aro.org>
Reviewed-by: Kiran Gunda <kgunda@...eaurora.org>
Signed-off-by: Lee Jones <lee.jones@...aro.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/video/backlight/qcom-wled.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c
index d46052d8ff415..3d276b30a78c9 100644
--- a/drivers/video/backlight/qcom-wled.c
+++ b/drivers/video/backlight/qcom-wled.c
@@ -956,8 +956,8 @@ static int wled_configure(struct wled *wled, int version)
 	struct wled_config *cfg = &wled->cfg;
 	struct device *dev = wled->dev;
 	const __be32 *prop_addr;
-	u32 size, val, c, string_len;
-	int rc, i, j;
+	u32 size, val, c;
+	int rc, i, j, string_len;
 
 	const struct wled_u32_opts *u32_opts = NULL;
 	const struct wled_u32_opts wled3_opts[] = {
-- 
2.20.1