On Fri, 23 Nov 2007, Grant Likely wrote:
> From: Grant Likely <[EMAIL PROTECTED]>
>
> This patch adds HDC support for the Cypress c67x00 family of devices.
>
> Signed-off-by: Grant Likely <[EMAIL PROTECTED]>
> +static void c67x00_sched_done(unsigned long __c67x00)
> +{
> + struct c67x00_hcd *c67x00 = (struct c67x00_hcd *)__c67x00;
> + struct c67x00_urb_priv *urbp, *tmp;
> + struct usb_hcd *hcd = c67x00_hcd_to_hcd(c67x00);
> + struct urb *urb;
> + int status;
> +
> + spin_lock(&c67x00->lock);
> +
> + /* Loop over the done list and give back all the urbs */
> + list_for_each_entry_safe(urbp, tmp, &c67x00->done_list, hep_node) {
> + urb = urbp->urb;
> + status = urbp->status;
> +
> + c67x00_release_urb(c67x00, urb);
> +
> + usb_hcd_unlink_urb_from_ep(hcd, urb);
> + usb_hcd_giveback_urb(hcd, urb, status);
> + }
> + spin_unlock(&c67x00->lock);
> +}
You need to release the spinlock around the call to
usb_hcd_giveback_urb(). Otherwise you will deadlock if the completion
routine submits another URB.
Alan Stern
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