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author | Franck Bui-Huu <fbh.work@gmail.com> | 2006-05-24 16:57:28 +0200 |
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committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-06-21 15:04:13 -0700 |
commit | 3428cc43d23f125dcb31c981aa91535dd3c4cb0d (patch) | |
tree | 6217a74b7bb3d475a88ab7437d7fcdaa64fab53c /drivers | |
parent | 80b47853b19114dd53e83e15bf1db3e183a66824 (diff) | |
download | op-kernel-dev-3428cc43d23f125dcb31c981aa91535dd3c4cb0d.zip op-kernel-dev-3428cc43d23f125dcb31c981aa91535dd3c4cb0d.tar.gz |
[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: 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>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/usb/storage/transport.c | 38 |
1 files changed, 10 insertions, 28 deletions
diff --git a/drivers/usb/storage/transport.c b/drivers/usb/storage/transport.c index 7ca896a..038f458 100644 --- a/drivers/usb/storage/transport.c +++ b/drivers/usb/storage/transport.c @@ -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; |