US_DEBUGP("%s called\n", __FUNCTION__);
- /* lock the device pointers and do the reset */
- mutex_lock(&(us->dev_mutex));
- result = us->transport_reset(us);
- mutex_unlock(&us->dev_mutex);
+ result = usb_autopm_get_interface(us->pusb_intf);
+ if (result == 0) {
+
+ /* lock the device pointers and do the reset */
+ mutex_lock(&(us->dev_mutex));
+ result = us->transport_reset(us);
+ mutex_unlock(&us->dev_mutex);
+ usb_autopm_put_interface(us->pusb_intf);
+ }
return result < 0 ? FAILED : SUCCESS;
}
{
struct us_data *us = usb_get_intfdata(iface);
+ US_DEBUGP("%s\n", __FUNCTION__);
+
/* Wait until no command is running */
mutex_lock(&us->dev_mutex);
- US_DEBUGP("%s\n", __FUNCTION__);
if (us->suspend_resume_hook)
(us->suspend_resume_hook)(us, US_SUSPEND);
- /* When runtime PM is working, we'll set a flag to indicate
- * whether we should autoresume when a SCSI request arrives. */
-
mutex_unlock(&us->dev_mutex);
return 0;
}
{
struct us_data *us = usb_get_intfdata(iface);
- mutex_lock(&us->dev_mutex);
-
US_DEBUGP("%s\n", __FUNCTION__);
+
if (us->suspend_resume_hook)
(us->suspend_resume_hook)(us, US_RESUME);
- mutex_unlock(&us->dev_mutex);
return 0;
}
{
struct us_data *us = (struct us_data *)__us;
struct Scsi_Host *host = us_to_host(us);
+ int autopm_rc;
current->flags |= PF_NOFREEZE;
US_DEBUGP("*** thread awakened.\n");
+ /* Autoresume the device */
+ autopm_rc = usb_autopm_get_interface(us->pusb_intf);
+
/* lock the device pointers */
mutex_lock(&(us->dev_mutex));
us->srb->result = SAM_STAT_GOOD;
}
+ /* Did the autoresume fail? */
+ else if (autopm_rc < 0) {
+ US_DEBUGP("Could not wake device\n");
+ us->srb->result = DID_ERROR << 16;
+ }
+
/* we've got a command, let's do it! */
else {
US_DEBUG(usb_stor_show_command(us->srb));
/* unlock the device pointers */
mutex_unlock(&us->dev_mutex);
+
+ /* Start an autosuspend */
+ if (autopm_rc == 0)
+ usb_autopm_put_interface(us->pusb_intf);
} /* for (;;) */
/* Wait until we are told to stop */
}
scsi_host_put(us_to_host(us));
+ usb_autopm_put_interface(us->pusb_intf);
complete_and_exit(&threads_gone, 0);
}
* start it up. */
scsi_host_get(us_to_host(us));
atomic_inc(&total_threads);
+ usb_autopm_get_interface(intf); /* dropped in the scanning thread */
wake_up_process(th);
return 0;
.pre_reset = storage_pre_reset,
.post_reset = storage_post_reset,
.id_table = storage_usb_ids,
+ .supports_autosuspend = 1,
};
static int __init usb_stor_init(void)