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Revert "usb-storage: implement autosuspend" 

This reverts commit 8dfe4b1486.

There are a number of issues still remaining in usb-storage autosuspend,
so, to be safe, we need to revert this for now.

Acked-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Greg Kroah-Hartman 2007-09-13 06:01:24 -07:00
parent 7d2c592609
commit d526875deb
2 changed files with 11 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/usb/storage/scsiglue.c
View File

@ -285,15 +285,10 @@ static int device_reset(struct scsi_cmnd *srb)
US_DEBUGP("%s called\n", __FUNCTION__);
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);
}
/* lock the device pointers and do the reset */
mutex_lock(&(us->dev_mutex));
result = us->transport_reset(us);
mutex_unlock(&us->dev_mutex);
return result < 0 ? FAILED : SUCCESS;
}

27
drivers/usb/storage/usb.c
View File

@ -184,14 +184,16 @@ static int storage_suspend(struct usb_interface *iface, pm_message_t message)
{
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;
}
@ -200,11 +202,13 @@ static int storage_resume(struct usb_interface *iface)
{
struct us_data *us = usb_get_intfdata(iface);
US_DEBUGP("%s\n", __FUNCTION__);
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;
}
@ -302,7 +306,6 @@ static int usb_stor_control_thread(void * __us)
{
struct us_data *us = (struct us_data *)__us;
struct Scsi_Host *host = us_to_host(us);
int autopm_rc;
for(;;) {
US_DEBUGP("*** thread sleeping.\n");
@ -311,9 +314,6 @@ static int usb_stor_control_thread(void * __us)
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));
@ -372,12 +372,6 @@ static int usb_stor_control_thread(void * __us)
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));
@ -420,10 +414,6 @@ static int usb_stor_control_thread(void * __us)
/* 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 */
@ -941,7 +931,6 @@ static int usb_stor_scan_thread(void * __us)
/* Should we unbind if no devices were detected? */
}
usb_autopm_put_interface(us->pusb_intf);
complete_and_exit(&us->scanning_done, 0);
}
@ -1027,7 +1016,6 @@ static int storage_probe(struct usb_interface *intf,
goto BadDevice;
}
usb_autopm_get_interface(intf); /* dropped in the scanning thread */
wake_up_process(th);
return 0;
@ -1065,7 +1053,6 @@ static struct usb_driver usb_storage_driver = {
.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)