diff options
| -rw-r--r-- | drivers/usb/class/usblp.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/usb/class/usblp.c b/drivers/usb/class/usblp.c index 9696668e5752..2c4a359355ba 100644 --- a/drivers/usb/class/usblp.c +++ b/drivers/usb/class/usblp.c @@ -345,16 +345,17 @@ static int usblp_check_status(struct usblp *usblp, int err) unsigned char status, newerr = 0; int error; - error = usblp_read_status (usblp, usblp->statusbuf); - if (error < 0) { + mutex_lock(&usblp->mut); + if ((error = usblp_read_status(usblp, usblp->statusbuf)) < 0) { + mutex_unlock(&usblp->mut); if (printk_ratelimit()) printk(KERN_ERR "usblp%d: error %d reading printer status\n", usblp->minor, error); return 0; } - status = *usblp->statusbuf; + mutex_unlock(&usblp->mut); if (~status & LP_PERRORP) newerr = 3; |