From: Johan Hovold Date: Thu, 19 Sep 2019 08:30:39 +0000 (+0200) Subject: USB: legousbtower: fix open after failed reset request X-Git-Tag: v4.9.197~22 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=397ef57498ee8c00c06dc8efe8ad6b5d6c4ddbb5;p=platform%2Fkernel%2Flinux-amlogic.git USB: legousbtower: fix open after failed reset request commit 0b074f6986751361ff442bc1127c1648567aa8d6 upstream. The driver would return with a nonzero open count in case the reset control request failed. This would prevent any further attempts to open the char dev until the device was disconnected. Fix this by incrementing the open count only on successful open. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Johan Hovold Cc: stable Link: https://lore.kernel.org/r/20190919083039.30898-5-johan@kernel.org Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/misc/legousbtower.c b/drivers/usb/misc/legousbtower.c index beb1ec8e54bb..80006cfe6a4f 100644 --- a/drivers/usb/misc/legousbtower.c +++ b/drivers/usb/misc/legousbtower.c @@ -354,7 +354,6 @@ static int tower_open (struct inode *inode, struct file *file) retval = -EBUSY; goto unlock_exit; } - dev->open_count = 1; /* reset the tower */ result = usb_control_msg (dev->udev, @@ -394,13 +393,14 @@ static int tower_open (struct inode *inode, struct file *file) dev_err(&dev->udev->dev, "Couldn't submit interrupt_in_urb %d\n", retval); dev->interrupt_in_running = 0; - dev->open_count = 0; goto unlock_exit; } /* save device in the file's private structure */ file->private_data = dev; + dev->open_count = 1; + unlock_exit: mutex_unlock(&dev->lock);