ath10k: spectral: Simplify error checking
diff mbox

Message ID 1507491026-28690-1-git-send-email-chris.gekas@gmail.com
State New
Headers show

Commit Message

Christos Gkekas Oct. 8, 2017, 7:30 p.m. UTC
Variable val is unsigned so checking whether it is less than zero is
redundant.

Signed-off-by: Christos Gkekas <chris.gekas@gmail.com>
---
 drivers/net/wireless/ath/ath10k/spectral.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

Comments

Kalle Valo Oct. 13, 2017, 12:28 p.m. UTC | #1
Christos Gkekas <chris.gekas@gmail.com> writes:

> Variable val is unsigned so checking whether it is less than zero is
> redundant.
>
> Signed-off-by: Christos Gkekas <chris.gekas@gmail.com>
> ---
>  drivers/net/wireless/ath/ath10k/spectral.c | 5 +----
>  1 file changed, 1 insertion(+), 4 deletions(-)
>
> diff --git a/drivers/net/wireless/ath/ath10k/spectral.c b/drivers/net/wireless/ath/ath10k/spectral.c
> index dd9cc09..1867937 100644
> --- a/drivers/net/wireless/ath/ath10k/spectral.c
> +++ b/drivers/net/wireless/ath/ath10k/spectral.c
> @@ -403,10 +403,7 @@ static ssize_t write_file_spectral_count(struct file *file,
>  		return -EFAULT;
>  
>  	buf[len] = '\0';
> -	if (kstrtoul(buf, 0, &val))
> -		return -EINVAL;
> -
> -	if (val < 0 || val > 255)
> +	if (kstrtoul(buf, 0, &val) || val > 255)
>  		return -EINVAL;

Removing the check for negative is correct but I don't think you are
simplifying anything, on the contrary it's harder to read. Please keep
the two if statements separate.
Christos Gkekas Oct. 14, 2017, 8:12 a.m. UTC | #2
On 13/10/17 12:28:50 +0000, Kalle Valo wrote:
> Christos Gkekas <chris.gekas@gmail.com> writes:
> 
> > Variable val is unsigned so checking whether it is less than zero is
> > redundant.
> >
> > Signed-off-by: Christos Gkekas <chris.gekas@gmail.com>
> > ---
> >  drivers/net/wireless/ath/ath10k/spectral.c | 5 +----
> >  1 file changed, 1 insertion(+), 4 deletions(-)
> >
> > diff --git a/drivers/net/wireless/ath/ath10k/spectral.c b/drivers/net/wireless/ath/ath10k/spectral.c
> > index dd9cc09..1867937 100644
> > --- a/drivers/net/wireless/ath/ath10k/spectral.c
> > +++ b/drivers/net/wireless/ath/ath10k/spectral.c
> > @@ -403,10 +403,7 @@ static ssize_t write_file_spectral_count(struct file *file,
> >  		return -EFAULT;
> >  
> >  	buf[len] = '\0';
> > -	if (kstrtoul(buf, 0, &val))
> > -		return -EINVAL;
> > -
> > -	if (val < 0 || val > 255)
> > +	if (kstrtoul(buf, 0, &val) || val > 255)
> >  		return -EINVAL;
> 
> Removing the check for negative is correct but I don't think you are
> simplifying anything, on the contrary it's harder to read. Please keep
> the two if statements separate.
> 
> -- 
> Kalle Valo

You are right, will make the change and send a new patch.
Thanks for your time.

Christos Gkekas

Patch
diff mbox

diff --git a/drivers/net/wireless/ath/ath10k/spectral.c b/drivers/net/wireless/ath/ath10k/spectral.c
index dd9cc09..1867937 100644
--- a/drivers/net/wireless/ath/ath10k/spectral.c
+++ b/drivers/net/wireless/ath/ath10k/spectral.c
@@ -403,10 +403,7 @@  static ssize_t write_file_spectral_count(struct file *file,
 		return -EFAULT;
 
 	buf[len] = '\0';
-	if (kstrtoul(buf, 0, &val))
-		return -EINVAL;
-
-	if (val < 0 || val > 255)
+	if (kstrtoul(buf, 0, &val) || val > 255)
 		return -EINVAL;
 
 	mutex_lock(&ar->conf_mutex);