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backlight: qcom-wled: Fix unsigned comparison to zero 

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: 775d2ffb4a ("backlight: qcom-wled: Restructure the driver for WLED3")
Signed-off-by: Chen Zhou <chenzhou10@huawei.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Reviewed-by: Kiran Gunda <kgunda@codeaurora.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Chen Zhou 2020-01-22 09:32:40 +08:00 committed by Lee Jones
parent c8fdcc8672
commit 7af43a7669
1 changed files with 2 additions and 2 deletions
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4
drivers/video/backlight/qcom-wled.c
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@ -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[] = {