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ocxl: fix signed comparison with less than zero 

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: 5ef3166e8a ("ocxl: Driver code for 'generic' opencapi devices")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Acked-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Colin Ian King 2018-01-30 15:11:44 +00:00 committed by Michael Ellerman
parent 6cc3f91bf6
commit dedab7f0d3
1 changed files with 1 additions and 1 deletions
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2
drivers/misc/ocxl/file.c
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@ -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_context *ctx = file->private_data;
struct ocxl_kernel_event_header header; struct ocxl_kernel_event_header header;
ssize_t rc; ssize_t rc;
size_t used = 0; ssize_t used = 0;
DEFINE_WAIT(event_wait); DEFINE_WAIT(event_wait);
memset(&header, 0, sizeof(header)); memset(&header, 0, sizeof(header));