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Fix for deadlock in USB device side mode.

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MFC after:	3 days
This commit is contained in:
Hans Petter Selasky 2014-08-05 06:38:21 +00:00
parent c65494287f
commit c3ccd2bf8c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=269566
1 changed files with 13 additions and 6 deletions
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19
sys/dev/usb/usb_device.c
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@ -448,6 +448,17 @@ usb_endpoint_foreach(struct usb_device *udev, struct usb_endpoint *ep)
return (NULL);
}
#if USB_HAVE_UGEN
static uint16_t
usb_get_refcount(struct usb_device *udev)
{
if (usb_proc_is_called_from(USB_BUS_EXPLORE_PROC(udev->bus)) ||
usb_proc_is_called_from(USB_BUS_CONTROL_XFER_PROC(udev->bus)))
return (1);
return (2);
}
#endif
/*------------------------------------------------------------------------*
* usb_wait_pending_ref_locked
*
@ -460,9 +471,7 @@ static void
usb_wait_pending_ref_locked(struct usb_device *udev)
{
#if USB_HAVE_UGEN
const uint16_t refcount =
usb_proc_is_called_from(
USB_BUS_EXPLORE_PROC(udev->bus)) ? 1 : 2;
const uint16_t refcount = usb_get_refcount(udev);
DPRINTF("Refcount = %d\n", (int)refcount);
@ -493,9 +502,7 @@ static void
usb_ref_restore_locked(struct usb_device *udev)
{
#if USB_HAVE_UGEN
const uint16_t refcount =
usb_proc_is_called_from(
USB_BUS_EXPLORE_PROC(udev->bus)) ? 1 : 2;
const uint16_t refcount = usb_get_refcount(udev);
DPRINTF("Refcount = %d\n", (int)refcount);