提交 aa8f6123 编写于 作者: G Gerd Hoffmann 提交者: Greg Kroah-Hartman

uas: new function to cancel data urbs

Add uas_unlink_data_urbs function to cancel in-flight data urbs.
Moves existing code into a separate function.

[ v2: also drop the locking, just call usb_unlink_urb no matter what,
      which is safe because the usb core guarantees the completion
      callback is called only once ]
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
上级 6a099c63
......@@ -87,6 +87,15 @@ static DECLARE_WORK(uas_work, uas_do_work);
static DEFINE_SPINLOCK(uas_work_lock);
static LIST_HEAD(uas_work_list);
static void uas_unlink_data_urbs(struct uas_dev_info *devinfo,
struct uas_cmd_info *cmdinfo)
{
if (cmdinfo->data_in_urb)
usb_unlink_urb(cmdinfo->data_in_urb);
if (cmdinfo->data_out_urb)
usb_unlink_urb(cmdinfo->data_out_urb);
}
static void uas_do_work(struct work_struct *work)
{
struct uas_cmd_info *cmdinfo;
......@@ -274,16 +283,9 @@ static void uas_stat_cmplt(struct urb *urb)
uas_sense(urb, cmnd);
if (cmnd->result != 0) {
/* cancel data transfers on error */
if (cmdinfo->state & DATA_IN_URB_INFLIGHT) {
spin_unlock_irqrestore(&devinfo->lock, flags);
usb_unlink_urb(cmdinfo->data_in_urb);
spin_lock_irqsave(&devinfo->lock, flags);
}
if (cmdinfo->state & DATA_OUT_URB_INFLIGHT) {
spin_unlock_irqrestore(&devinfo->lock, flags);
usb_unlink_urb(cmdinfo->data_out_urb);
spin_lock_irqsave(&devinfo->lock, flags);
}
spin_unlock_irqrestore(&devinfo->lock, flags);
uas_unlink_data_urbs(devinfo, cmdinfo);
spin_lock_irqsave(&devinfo->lock, flags);
}
cmdinfo->state &= ~COMMAND_INFLIGHT;
uas_try_complete(cmnd, __func__);
......
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