diff options
| author | David Vrabel <david.vrabel@csr.com> | 2009-04-08 19:36:32 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-04-17 19:50:28 +0200 |
| commit | 5936ac7f93965931c508e1928d142076998ce65d (patch) | |
| tree | ab6eafd9032dd6bf4b9b35d1c799745de2487000 /drivers/usb/wusbcore | |
| parent | WUSB: disconnect all devices when stopping a WUSB HCD (diff) | |
| download | linux-5936ac7f93965931c508e1928d142076998ce65d.tar.xz linux-5936ac7f93965931c508e1928d142076998ce65d.zip | |
WUSB: fix oops when completing URBs for disconnected devices
Fix an oops in wusbhc_giveback_urb() if the wusb device had disconnected
while an urb was in progress. Also release the ref count obtained here.
Signed-off-by: David Vrabel <david.vrabel@csr.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/wusbcore')
| -rw-r--r-- | drivers/usb/wusbcore/devconnect.c | 2 | ||||
| -rw-r--r-- | drivers/usb/wusbcore/wusbhc.c | 6 |
2 files changed, 6 insertions, 2 deletions
diff --git a/drivers/usb/wusbcore/devconnect.c b/drivers/usb/wusbcore/devconnect.c index 63f200e4efb1..4ac4300a3f9a 100644 --- a/drivers/usb/wusbcore/devconnect.c +++ b/drivers/usb/wusbcore/devconnect.c @@ -267,6 +267,8 @@ static void wusbhc_devconnect_acked_work(struct work_struct *work) mutex_lock(&wusbhc->mutex); wusbhc_devconnect_acked(wusbhc, wusb_dev); mutex_unlock(&wusbhc->mutex); + + wusb_dev_put(wusb_dev); } /* diff --git a/drivers/usb/wusbcore/wusbhc.c b/drivers/usb/wusbcore/wusbhc.c index 07c63a31c799..3638cc68529f 100644 --- a/drivers/usb/wusbcore/wusbhc.c +++ b/drivers/usb/wusbcore/wusbhc.c @@ -339,13 +339,15 @@ void wusbhc_giveback_urb(struct wusbhc *wusbhc, struct urb *urb, int status) { struct wusb_dev *wusb_dev = __wusb_dev_get_by_usb_dev(wusbhc, urb->dev); - if (status == 0) { + if (status == 0 && wusb_dev) { wusb_dev->entry_ts = jiffies; - /* wusbhc_devconnect_acked() can't be called from from + /* wusbhc_devconnect_acked() can't be called from atomic context so defer it to a work queue. */ if (!list_empty(&wusb_dev->cack_node)) queue_work(wusbd, &wusb_dev->devconnect_acked_work); + else + wusb_dev_put(wusb_dev); } usb_hcd_giveback_urb(&wusbhc->usb_hcd, urb, status); |