staging/mei: fix check for allocating host client id
MEI_CLIENTS_MAX is 255 and host_client_id is u8 therefore
for check to work we need to first assign the return value
of find_first_zero_bit to unsigned long variable
Fix warning
drivers/staging/mei/main.c: In function mei_open
drivers/staging/mei/main.c:260:2: warning: comparison is always false due to limited range of data type
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/mei/main.c b/drivers/staging/mei/main.c
index 410b5d4..1ea04b3 100644
--- a/drivers/staging/mei/main.c
+++ b/drivers/staging/mei/main.c
@@ -228,8 +228,9 @@
static int mei_open(struct inode *inode, struct file *file)
{
struct mei_cl *cl;
- int err;
struct mei_device *dev;
+ unsigned long cl_id;
+ int err;
err = -ENODEV;
if (!mei_device)
@@ -255,14 +256,16 @@
if (dev->open_handle_count >= MEI_MAX_OPEN_HANDLE_COUNT)
goto out_unlock;
- cl->host_client_id = find_first_zero_bit(dev->host_clients_map,
- MEI_CLIENTS_MAX);
- if (cl->host_client_id > MEI_CLIENTS_MAX)
+ cl_id = find_first_zero_bit(dev->host_clients_map, MEI_CLIENTS_MAX);
+ if (cl_id >= MEI_CLIENTS_MAX)
goto out_unlock;
+ cl->host_client_id = cl_id;
+
dev_dbg(&dev->pdev->dev, "client_id = %d\n", cl->host_client_id);
dev->open_handle_count++;
+
list_add_tail(&cl->link, &dev->file_list);
set_bit(cl->host_client_id, dev->host_clients_map);
