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[PATCH] usb-storage: get rid of the timer during URB submission

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This patch uses completion timeout instead of a timer to implement
a timeout when submitting an URB.

It also put the task in interruptible state instead of an
uninterruptible one while waiting for the completion.

Signed-off-by: Franck Bui-Huu <vagabon.xyz@gmail.com>
Signed-off-by: Matthew Dharm <mdharm-usb@one-eyed-alien.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Franck Bui-Huu 2006-05-24 16:57:28 +02:00 committed by Greg Kroah-Hartman
parent 80b47853b1
commit 3428cc43d2
1 changed files with 10 additions and 28 deletions
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38
drivers/usb/storage/transport.c
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@ -115,19 +115,6 @@ static void usb_stor_blocking_completion(struct urb *urb, struct pt_regs *regs)
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
*
@ -138,7 +125,7 @@ static void timeout_handler(unsigned long us_)
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 */
@ -185,22 +172,17 @@ static int usb_stor_msg_common(struct us_data *us, int timeout)
}
}
/* 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_unlink_urb(us->current_urb);
}
/* return the URB status */
return us->current_urb->status;