Commit 3428cc43 authored by Franck Bui-Huu's avatar Franck Bui-Huu Committed by Greg Kroah-Hartman

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

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: default avatarFranck Bui-Huu <vagabon.xyz@gmail.com>
Signed-off-by: default avatarMatthew Dharm <mdharm-usb@one-eyed-alien.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 80b47853
...@@ -115,19 +115,6 @@ static void usb_stor_blocking_completion(struct urb *urb, struct pt_regs *regs) ...@@ -115,19 +115,6 @@ static void usb_stor_blocking_completion(struct urb *urb, struct pt_regs *regs)
complete(urb_done_ptr); 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 /* This is the common part of the URB message submission code
* *
...@@ -138,7 +125,7 @@ static void timeout_handler(unsigned long us_) ...@@ -138,7 +125,7 @@ static void timeout_handler(unsigned long us_)
static int usb_stor_msg_common(struct us_data *us, int timeout) static int usb_stor_msg_common(struct us_data *us, int timeout)
{ {
struct completion urb_done; struct completion urb_done;
struct timer_list to_timer; long timeleft;
int status; int status;
/* don't submit URBs during abort/disconnect processing */ /* don't submit URBs during abort/disconnect processing */
...@@ -185,22 +172,17 @@ static int usb_stor_msg_common(struct us_data *us, int timeout) ...@@ -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 the completion of the URB */
wait_for_completion(&urb_done); timeleft = wait_for_completion_interruptible_timeout(
clear_bit(US_FLIDX_URB_ACTIVE, &us->flags); &urb_done, timeout ? : MAX_SCHEDULE_TIMEOUT);
/* clean up the timeout timer */ clear_bit(US_FLIDX_URB_ACTIVE, &us->flags);
if (timeout > 0)
del_timer_sync(&to_timer); if (timeleft <= 0) {
US_DEBUGP("%s -- cancelling URB\n",
timeleft == 0 ? "Timeout" : "Signal");
usb_unlink_urb(us->current_urb);
}
/* return the URB status */ /* return the URB status */
return us->current_urb->status; return us->current_urb->status;
......
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