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usb-storage: change remaining semaphore to completion 

This patch (as1090) converts the one remaining semaphore in
usb-storage into a completion.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Cc: Matthew Dharm <mdharm-usb@one-eyed-alien.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern 2008-05-01 15:36:13 -04:00 committed by Greg Kroah-Hartman
parent 7e4d6c3879
commit 7119e3c37f
3 changed files with 6 additions and 6 deletions
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2
drivers/usb/storage/scsiglue.c
View File

@ -248,7 +248,7 @@ static int queuecommand(struct scsi_cmnd *srb,
/* enqueue the command and wake up the control thread */
srb->scsi_done = done;
us->srb = srb;
up(&(us->sema));
complete(&us->cmnd_ready);
return 0;
}

6
drivers/usb/storage/usb.c
View File

@ -312,7 +312,7 @@ static int usb_stor_control_thread(void * __us)
for(;;) {
US_DEBUGP("*** thread sleeping.\n");
if(down_interruptible(&us->sema))
if (wait_for_completion_interruptible(&us->cmnd_ready))
break;
US_DEBUGP("*** thread awakened.\n");
@ -825,7 +825,7 @@ static void usb_stor_release_resources(struct us_data *us)
*/
US_DEBUGP("-- sending exit command to thread\n");
set_bit(US_FLIDX_DISCONNECTING, &us->dflags);
up(&us->sema);
complete(&us->cmnd_ready);
if (us->ctl_thread)
kthread_stop(us->ctl_thread);
@ -975,7 +975,7 @@ static int storage_probe(struct usb_interface *intf,
us = host_to_us(host);
memset(us, 0, sizeof(struct us_data));
mutex_init(&(us->dev_mutex));
init_MUTEX_LOCKED(&(us->sema));
init_completion(&us->cmnd_ready);
init_completion(&(us->notify));
init_waitqueue_head(&us->delay_wait);
init_completion(&us->scanning_done);

2
drivers/usb/storage/usb.h
View File

@ -148,7 +148,7 @@ struct us_data {
struct task_struct *ctl_thread; /* the control thread */
/* mutual exclusion and synchronization structures */
struct semaphore sema; /* to sleep thread on */
struct completion cmnd_ready; /* to sleep thread on */
struct completion notify; /* thread begin/end */
wait_queue_head_t delay_wait; /* wait during scan, reset */
struct completion scanning_done; /* wait for scan thread */