[media] pvrusb2: fix smatch errors

These are false positives, but still easy to fix.

pvrusb2-hdw.c:3676 pvr2_send_request_ex() error: we previously assumed 'write_data' could be null (see line 3648)
pvrusb2-hdw.c:3829 pvr2_send_request_ex() error: we previously assumed 'read_data' could be null (see line 3649)

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

diff --git a/drivers/media/usb/pvrusb2/pvrusb2-hdw.c b/drivers/media/usb/pvrusb2/pvrusb2-hdw.c
index 1a093e5..83e9a3e 100644 (file)
--- a/drivers/media/usb/pvrusb2/pvrusb2-hdw.c
+++ b/drivers/media/usb/pvrusb2/pvrusb2-hdw.c
@@ -3672,11 +3672,10 @@ static int pvr2_send_request_ex(struct pvr2_hdw *hdw,
 
 
        hdw->cmd_debug_state = 1;
-       if (write_len) {
+       if (write_len && write_data)
                hdw->cmd_debug_code = ((unsigned char *)write_data)[0];
-       } else {
+       else
                hdw->cmd_debug_code = 0;
-       }
        hdw->cmd_debug_write_len = write_len;
        hdw->cmd_debug_read_len = read_len;
 
@@ -3688,7 +3687,7 @@ static int pvr2_send_request_ex(struct pvr2_hdw *hdw,
        setup_timer(&timer, pvr2_ctl_timeout, (unsigned long)hdw);
        timer.expires = jiffies + timeout;
 
-       if (write_len) {
+       if (write_len && write_data) {
                hdw->cmd_debug_state = 2;
                /* Transfer write data to internal buffer */
                for (idx = 0; idx < write_len; idx++) {
@@ -3795,7 +3794,7 @@ static int pvr2_send_request_ex(struct pvr2_hdw *hdw,
                        goto done;
                }
        }
-       if (read_len) {
+       if (read_len && read_data) {
                /* Validate results of read request */
                if ((hdw->ctl_read_urb->status != 0) &&
                    (hdw->ctl_read_urb->status != -ENOENT) &&