[PATCH][next] soundwire: qcom: Fix a u8 comparison with less than zero

[PATCH][next] soundwire: qcom: Fix a u8 comparison with less than zero

[Colin King]

From: Colin Ian King <colin.king@canonical.com>

Variable devnum is being checked for a less than zero error return
however the comparison will always be false because devnum is an 8 bit
unsigned integer. Fix this by making devnum an int.  Also there is no
need to iniitialize devnum with zero as this value is no read, so
remove the redundant assignment.

Addresses-Coverity: ("Unsigned compared against 0")
Fixes: c7d49c76d1d5 ("soundwire: qcom: add support to new interrupts")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
 drivers/soundwire/qcom.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c
index b08ecb9b418c..ec86c4e53fdb 100644
--- a/drivers/soundwire/qcom.c
+++ b/drivers/soundwire/qcom.c
@@ -428,7 +428,7 @@ static irqreturn_t qcom_swrm_irq_handler(int irq, void *dev_id)
 	struct qcom_swrm_ctrl *swrm = dev_id;
 	u32 value, intr_sts, intr_sts_masked, slave_status;
 	u32 i;
-	u8 devnum = 0;
+	int devnum;
 	int ret = IRQ_HANDLED;
 
 	swrm->reg_read(swrm, SWRM_INTERRUPT_STATUS, &intr_sts);
-- 
2.30.2

Re: [PATCH][next] soundwire: qcom: Fix a u8 comparison with less than zero

[Bjorn Andersson]

On Wed 31 Mar 09:09 CDT 2021, Colin King wrote:

> From: Colin Ian King <colin.king@canonical.com>
> 
> Variable devnum is being checked for a less than zero error return
> however the comparison will always be false because devnum is an 8 bit
> unsigned integer. Fix this by making devnum an int.  Also there is no
> need to iniitialize devnum with zero as this value is no read, so
> remove the redundant assignment.
> 
> Addresses-Coverity: ("Unsigned compared against 0")
> Fixes: c7d49c76d1d5 ("soundwire: qcom: add support to new interrupts")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>

> ---
>  drivers/soundwire/qcom.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c
> index b08ecb9b418c..ec86c4e53fdb 100644
> --- a/drivers/soundwire/qcom.c
> +++ b/drivers/soundwire/qcom.c
> @@ -428,7 +428,7 @@ static irqreturn_t qcom_swrm_irq_handler(int irq, void *dev_id)
>  	struct qcom_swrm_ctrl *swrm = dev_id;
>  	u32 value, intr_sts, intr_sts_masked, slave_status;
>  	u32 i;
> -	u8 devnum = 0;
> +	int devnum;
>  	int ret = IRQ_HANDLED;
>  
>  	swrm->reg_read(swrm, SWRM_INTERRUPT_STATUS, &intr_sts);
> -- 
> 2.30.2
> 

Re: [PATCH][next] soundwire: qcom: Fix a u8 comparison with less than zero

[patchwork-bot+linux-arm-msm]

Hello:

This patch was applied to qcom/linux.git (refs/heads/for-next):

On Wed, 31 Mar 2021 15:09:44 +0100 you wrote:
> From: Colin Ian King <colin.king@canonical.com>
> 
> Variable devnum is being checked for a less than zero error return
> however the comparison will always be false because devnum is an 8 bit
> unsigned integer. Fix this by making devnum an int.  Also there is no
> need to iniitialize devnum with zero as this value is no read, so
> remove the redundant assignment.
> 
> [...]

Here is the summary with links:
  - [next] soundwire: qcom: Fix a u8 comparison with less than zero
    https://git.kernel.org/qcom/c/b26b48749b18

You are awesome, thank you!
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