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authorLinus Torvalds <torvalds@woody.linux-foundation.org>2007-09-13 08:43:38 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-09-13 08:43:38 -0700
commit19299b1a722198830e39264a0f2edadd3fde74c2 (patch)
tree987d546dd5fb9c278e9fa908c81e1e7699f0033f
parentf3da54ba140c6427fa4a32913e1bf406f41b5dda (diff)
parentd526875deb42e0f4c0d31cb50b4e5bfaf19c3138 (diff)
downloadlinux-linaro-19299b1a722198830e39264a0f2edadd3fde74c2.tar.gz
Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/usb-2.6
* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/usb-2.6: Revert "usb-storage: implement autosuspend" USB: disable autosuspend by default for non-hubs
-rw-r--r--drivers/usb/core/quirks.c6
-rw-r--r--drivers/usb/storage/scsiglue.c13
-rw-r--r--drivers/usb/storage/usb.c27
3 files changed, 17 insertions, 29 deletions
diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index 7f17d0fd76c..ebf3dc20110 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -152,4 +152,10 @@ void usb_detect_quirks(struct usb_device *udev)
/* do any special quirk handling here if needed */
if (udev->quirks & USB_QUIRK_NO_AUTOSUSPEND)
usb_autosuspend_quirk(udev);
+
+ /* By default, disable autosuspend for all non-hubs */
+#ifdef CONFIG_USB_SUSPEND
+ if (udev->descriptor.bDeviceClass != USB_CLASS_HUB)
+ udev->autosuspend_delay = -1;
+#endif
}
diff --git a/drivers/usb/storage/scsiglue.c b/drivers/usb/storage/scsiglue.c
index 47e56079925..1ba19eaa197 100644
--- a/drivers/usb/storage/scsiglue.c
+++ b/drivers/usb/storage/scsiglue.c
@@ -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;
}
diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c
index 25e557d4fe6..59181667066 100644
--- a/drivers/usb/storage/usb.c
+++ b/drivers/usb/storage/usb.c
@@ -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 @@ SkipForAbort:
/* 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 @@ retry:
/* 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)