diff mbox series

NFC: nfcmrvl: fix error check return value of irq_of_parse_and_map()

Message ID 20220422084605.2775542-1-lv.ruyi@zte.com.cn (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series NFC: nfcmrvl: fix error check return value of irq_of_parse_and_map() | expand

Checks

Context Check Description
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix warning Target tree name not specified in the subject
netdev/cover_letter success Single patches do not need cover letters
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers success CCed 6 of 6 maintainers
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/verify_fixes success Fixes tag looks correct
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 8 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/tree_selection success Guessing tree name failed - patch did not apply

Commit Message

CGEL April 22, 2022, 8:46 a.m. UTC 
From: Lv Ruyi <lv.ruyi@zte.com.cn>

The irq_of_parse_and_map() function returns 0 on failure, and does not
return an negative value.

Fixes: 	b5b3e23e4cac ("NFC: nfcmrvl: add i2c driver")
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Lv Ruyi <lv.ruyi@zte.com.cn>
---
 drivers/nfc/nfcmrvl/i2c.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Krzysztof Kozlowski April 22, 2022, 10:30 a.m. UTC | #1 
On 22/04/2022 10:46, cgel.zte@gmail.com wrote:
> From: Lv Ruyi <lv.ruyi@zte.com.cn>
> 
> The irq_of_parse_and_map() function returns 0 on failure, and does not
> return an negative value.
> 
> Fixes: 	b5b3e23e4cac ("NFC: nfcmrvl: add i2c driver")

Some unneeded indentation above.

Except that:

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

> Reported-by: Zeal Robot <zealci@zte.com.cn>
> Signed-off-by: Lv Ruyi <lv.ruyi@zte.com.cn>




Best regards,
Krzysztof
Jakub Kicinski April 22, 2022, 11:09 p.m. UTC | #2 
On Fri, 22 Apr 2022 08:46:05 +0000 cgel.zte@gmail.com wrote:
> diff --git a/drivers/nfc/nfcmrvl/i2c.c b/drivers/nfc/nfcmrvl/i2c.c
> index ceef81d93ac9..7dcc97707363 100644
> --- a/drivers/nfc/nfcmrvl/i2c.c
> +++ b/drivers/nfc/nfcmrvl/i2c.c
> @@ -167,7 +167,7 @@ static int nfcmrvl_i2c_parse_dt(struct device_node *node,
>  		pdata->irq_polarity = IRQF_TRIGGER_RISING;
>  
>  	ret = irq_of_parse_and_map(node, 0);
> -	if (ret < 0) {
> +	if (!ret) {
>  		pr_err("Unable to get irq, error: %d\n", ret);
>  		return ret;

If ret is guaranteed to be 0 in this branch now, why print it, 
and how is it okay to return it from this function on error?

The usual low quality patch from the CGEL team :/
diff mbox series

Patch

diff --git a/drivers/nfc/nfcmrvl/i2c.c b/drivers/nfc/nfcmrvl/i2c.c
index ceef81d93ac9..7dcc97707363 100644
--- a/drivers/nfc/nfcmrvl/i2c.c
+++ b/drivers/nfc/nfcmrvl/i2c.c
@@ -167,7 +167,7 @@  static int nfcmrvl_i2c_parse_dt(struct device_node *node,
 		pdata->irq_polarity = IRQF_TRIGGER_RISING;
 
 	ret = irq_of_parse_and_map(node, 0);
-	if (ret < 0) {
+	if (!ret) {
 		pr_err("Unable to get irq, error: %d\n", ret);
 		return ret;
 	}