Re: [PATCH] ocxl: fix signed comparison with less than zero

[Frederic Barrat <fbarrat@linux.vnet.ibm.com>]

Le 30/01/2018 à 16:11, Colin King a écrit :
> From: Colin Ian King <colin.king@canonical.com>
> 
> Currently the comparison of used < 0 is always false because
> uses is a size_t. Fix this by making used a ssize_t type.
> 
> Detected by Coccinelle:
> drivers/misc/ocxl/file.c:320:6-10: WARNING: Unsigned expression
> compared with zero: used < 0
> 
> Fixes: 5ef3166e8a32 ("ocxl: Driver code for 'generic' opencapi devices")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> ---

Thanks!
Acked-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>

>   drivers/misc/ocxl/file.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/misc/ocxl/file.c b/drivers/misc/ocxl/file.c
> index c90c1a578d2f..1287e4430e6b 100644
> --- a/drivers/misc/ocxl/file.c
> +++ b/drivers/misc/ocxl/file.c
> @@ -277,7 +277,7 @@ static ssize_t afu_read(struct file *file, char __user *buf, size_t count,
>   	struct ocxl_context *ctx = file->private_data;
>   	struct ocxl_kernel_event_header header;
>   	ssize_t rc;
> -	size_t used = 0;
> +	ssize_t used = 0;
>   	DEFINE_WAIT(event_wait);
> 
>   	memset(&header, 0, sizeof(header));
>