* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-#include <linux/config.h>
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/slab.h>
/* This is the completion handler which will wake us up when an URB
* completes.
*/
-static void usb_stor_blocking_completion(struct urb *urb, struct pt_regs *regs)
+static void usb_stor_blocking_completion(struct urb *urb)
{
struct completion *urb_done_ptr = (struct completion *)urb->context;
complete(urb_done_ptr);
}
-
-/* This is the timeout handler which will cancel an URB when its timeout
- * expires.
- */
-static void timeout_handler(unsigned long us_)
-{
- struct us_data *us = (struct us_data *) us_;
-
- if (test_and_clear_bit(US_FLIDX_URB_ACTIVE, &us->flags)) {
- US_DEBUGP("Timeout -- cancelling URB\n");
- usb_unlink_urb(us->current_urb);
- }
-}
/* This is the common part of the URB message submission code
*
static int usb_stor_msg_common(struct us_data *us, int timeout)
{
struct completion urb_done;
- struct timer_list to_timer;
+ long timeleft;
int status;
/* don't submit URBs during abort/disconnect processing */
}
}
- /* submit the timeout timer, if a timeout was requested */
- if (timeout > 0) {
- init_timer(&to_timer);
- to_timer.expires = jiffies + timeout;
- to_timer.function = timeout_handler;
- to_timer.data = (unsigned long) us;
- add_timer(&to_timer);
- }
-
/* wait for the completion of the URB */
- wait_for_completion(&urb_done);
- clear_bit(US_FLIDX_URB_ACTIVE, &us->flags);
+ timeleft = wait_for_completion_interruptible_timeout(
+ &urb_done, timeout ? : MAX_SCHEDULE_TIMEOUT);
- /* clean up the timeout timer */
- if (timeout > 0)
- del_timer_sync(&to_timer);
+ clear_bit(US_FLIDX_URB_ACTIVE, &us->flags);
+
+ if (timeleft <= 0) {
+ US_DEBUGP("%s -- cancelling URB\n",
+ timeleft == 0 ? "Timeout" : "Signal");
+ usb_kill_urb(us->current_urb);
+ }
/* return the URB status */
return us->current_urb->status;
return USB_STOR_XFER_ERROR;
return USB_STOR_XFER_STALLED;
- /* timeout or excessively long NAK */
- case -ETIMEDOUT:
- US_DEBUGP("-- timeout or NAK\n");
- return USB_STOR_XFER_ERROR;
-
/* babble - the device tried to send more than we wanted to read */
case -EOVERFLOW:
US_DEBUGP("-- babble\n");
US_DEBUGP("%s: xfer %u bytes, %d entries\n", __FUNCTION__,
length, num_sg);
result = usb_sg_init(&us->current_sg, us->pusb_dev, pipe, 0,
- sg, num_sg, length, SLAB_NOIO);
+ sg, num_sg, length, GFP_NOIO);
if (result) {
US_DEBUGP("usb_sg_init returned %d\n", result);
return USB_STOR_XFER_ERROR;
* device reset. */
Handle_Errors:
- /* Let the SCSI layer know we are doing a reset, set the
- * RESETTING bit, and clear the ABORTING bit so that the reset
- * may proceed. */
+ /* Set the RESETTING bit, and clear the ABORTING bit so that
+ * the reset may proceed. */
scsi_lock(us_to_host(us));
- usb_stor_report_bus_reset(us);
set_bit(US_FLIDX_RESETTING, &us->flags);
clear_bit(US_FLIDX_ABORTING, &us->flags);
scsi_unlock(us_to_host(us));
+ /* We must release the device lock because the pre_reset routine
+ * will want to acquire it. */
+ mutex_unlock(&us->dev_mutex);
result = usb_stor_port_reset(us);
+ mutex_lock(&us->dev_mutex);
+
if (result < 0) {
scsi_lock(us_to_host(us));
usb_stor_report_device_reset(us);
0, us->ifnum, NULL, 0);
}
-/* Issue a USB port reset to the device. But don't do anything if
- * there's more than one interface in the device, so that other users
- * are not affected. */
+/* Issue a USB port reset to the device. The caller must not hold
+ * us->dev_mutex.
+ */
int usb_stor_port_reset(struct us_data *us)
{
- int result, rc;
+ int result, rc_lock;
- if (test_bit(US_FLIDX_DISCONNECTING, &us->flags)) {
- result = -EIO;
- US_DEBUGP("No reset during disconnect\n");
- } else if (us->pusb_dev->actconfig->desc.bNumInterfaces != 1) {
- result = -EBUSY;
- US_DEBUGP("Refusing to reset a multi-interface device\n");
- } else {
- result = rc =
- usb_lock_device_for_reset(us->pusb_dev, us->pusb_intf);
- if (result < 0) {
- US_DEBUGP("unable to lock device for reset: %d\n",
- result);
+ result = rc_lock =
+ usb_lock_device_for_reset(us->pusb_dev, us->pusb_intf);
+ if (result < 0)
+ US_DEBUGP("unable to lock device for reset: %d\n", result);
+ else {
+ /* Were we disconnected while waiting for the lock? */
+ if (test_bit(US_FLIDX_DISCONNECTING, &us->flags)) {
+ result = -EIO;
+ US_DEBUGP("No reset during disconnect\n");
} else {
- result = usb_reset_device(us->pusb_dev);
- if (rc)
- usb_unlock_device(us->pusb_dev);
- US_DEBUGP("usb_reset_device returns %d\n", result);
+ result = usb_reset_composite_device(
+ us->pusb_dev, us->pusb_intf);
+ US_DEBUGP("usb_reset_composite_device returns %d\n",
+ result);
}
+ if (rc_lock)
+ usb_unlock_device(us->pusb_dev);
}
return result;
}