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

[Frederic Barrat]

Le 30/01/2018 à 16:11, Colin King a écrit :

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

Thanks!
Acked-by: Frederic Barrat <fbar...@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));