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path: root/drivers/usb/storage/usb.c
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Diffstat (limited to 'drivers/usb/storage/usb.c')
-rw-r--r--drivers/usb/storage/usb.c25
1 files changed, 13 insertions, 12 deletions
diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c
index dbcf23980ff..dd108634348 100644
--- a/drivers/usb/storage/usb.c
+++ b/drivers/usb/storage/usb.c
@@ -55,6 +55,7 @@
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/kthread.h>
+#include <linux/mutex.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
@@ -188,7 +189,7 @@ static int storage_suspend(struct usb_interface *iface, pm_message_t message)
struct us_data *us = usb_get_intfdata(iface);
/* Wait until no command is running */
- down(&us->dev_semaphore);
+ mutex_lock(&us->dev_mutex);
US_DEBUGP("%s\n", __FUNCTION__);
if (us->suspend_resume_hook)
@@ -198,7 +199,7 @@ static int storage_suspend(struct usb_interface *iface, pm_message_t message)
/* When runtime PM is working, we'll set a flag to indicate
* whether we should autoresume when a SCSI request arrives. */
- up(&us->dev_semaphore);
+ mutex_unlock(&us->dev_mutex);
return 0;
}
@@ -206,14 +207,14 @@ static int storage_resume(struct usb_interface *iface)
{
struct us_data *us = usb_get_intfdata(iface);
- down(&us->dev_semaphore);
+ mutex_lock(&us->dev_mutex);
US_DEBUGP("%s\n", __FUNCTION__);
if (us->suspend_resume_hook)
(us->suspend_resume_hook)(us, US_RESUME);
iface->dev.power.power_state.event = PM_EVENT_ON;
- up(&us->dev_semaphore);
+ mutex_unlock(&us->dev_mutex);
return 0;
}
@@ -276,12 +277,12 @@ static int usb_stor_control_thread(void * __us)
US_DEBUGP("*** thread awakened.\n");
/* lock the device pointers */
- down(&(us->dev_semaphore));
+ mutex_lock(&(us->dev_mutex));
/* if the device has disconnected, we are free to exit */
if (test_bit(US_FLIDX_DISCONNECTING, &us->flags)) {
US_DEBUGP("-- exiting\n");
- up(&(us->dev_semaphore));
+ mutex_unlock(&us->dev_mutex);
break;
}
@@ -370,7 +371,7 @@ SkipForAbort:
scsi_unlock(host);
/* unlock the device pointers */
- up(&(us->dev_semaphore));
+ mutex_unlock(&us->dev_mutex);
} /* for (;;) */
scsi_host_put(host);
@@ -815,8 +816,8 @@ static void quiesce_and_remove_host(struct us_data *us)
* The thread will exit when it sees the DISCONNECTING flag. */
/* Wait for the current command to finish, then remove the host */
- down(&us->dev_semaphore);
- up(&us->dev_semaphore);
+ mutex_lock(&us->dev_mutex);
+ mutex_unlock(&us->dev_mutex);
/* queuecommand won't accept any new commands and the control
* thread won't execute a previously-queued command. If there
@@ -870,9 +871,9 @@ retry:
/* For bulk-only devices, determine the max LUN value */
if (us->protocol == US_PR_BULK &&
!(us->flags & US_FL_SINGLE_LUN)) {
- down(&us->dev_semaphore);
+ mutex_lock(&us->dev_mutex);
us->max_lun = usb_stor_Bulk_max_lun(us);
- up(&us->dev_semaphore);
+ mutex_unlock(&us->dev_mutex);
}
scsi_scan_host(us_to_host(us));
printk(KERN_DEBUG "usb-storage: device scan complete\n");
@@ -912,7 +913,7 @@ static int storage_probe(struct usb_interface *intf,
us = host_to_us(host);
memset(us, 0, sizeof(struct us_data));
- init_MUTEX(&(us->dev_semaphore));
+ mutex_init(&(us->dev_mutex));
init_MUTEX_LOCKED(&(us->sema));
init_completion(&(us->notify));
init_waitqueue_head(&us->delay_wait);