From: Johan Hovold Date: Tue, 1 Oct 2019 08:49:06 +0000 (+0200) Subject: USB: usblp: fix runtime PM after driver unbind X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=9a31535859bfd8d1c3ed391f5e9247cd87bb7909;p=linux.git USB: usblp: fix runtime PM after driver unbind Since commit c2b71462d294 ("USB: core: Fix bug caused by duplicate interface PM usage counter") USB drivers must always balance their runtime PM gets and puts, including when the driver has already been unbound from the interface. Leaving the interface with a positive PM usage counter would prevent a later bound driver from suspending the device. Fixes: c2b71462d294 ("USB: core: Fix bug caused by duplicate interface PM usage counter") Cc: stable Signed-off-by: Johan Hovold Link: https://lore.kernel.org/r/20191001084908.2003-3-johan@kernel.org Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/class/usblp.c b/drivers/usb/class/usblp.c index 7fea4999d3529..fb8bd60c83f48 100644 --- a/drivers/usb/class/usblp.c +++ b/drivers/usb/class/usblp.c @@ -461,10 +461,12 @@ static int usblp_release(struct inode *inode, struct file *file) mutex_lock(&usblp_mutex); usblp->used = 0; - if (usblp->present) { + if (usblp->present) usblp_unlink_urbs(usblp); - usb_autopm_put_interface(usblp->intf); - } else /* finish cleanup from disconnect */ + + usb_autopm_put_interface(usblp->intf); + + if (!usblp->present) /* finish cleanup from disconnect */ usblp_cleanup(usblp); mutex_unlock(&usblp_mutex); return 0;