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authorAlan Stern <stern@rowland.harvard.edu>2006-06-01 13:52:56 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2006-06-21 15:04:15 -0700
commit47104b0dd32cec467574822b0dc3517b3de3f0ad (patch)
tree7cc1a012b3351275249c15fbdfc608a1774762b4 /drivers/usb/storage/usb.c
parent7de18d8bf4b470752e799e219b38b6dff4b49993 (diff)
downloadop-kernel-dev-47104b0dd32cec467574822b0dc3517b3de3f0ad.zip
op-kernel-dev-47104b0dd32cec467574822b0dc3517b3de3f0ad.tar.gz
[PATCH] usb-storage: use usb_reset_composite_device
This patch (as701) modifies usb-storage to take advantage of the new usb_reset_composite_device() API. Now we will be able to safely request port resets even if other drivers are bound to a mass-storage device. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/storage/usb.c')
-rw-r--r--drivers/usb/storage/usb.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c
index 0142fe8..e232c7c 100644
--- a/drivers/usb/storage/usb.c
+++ b/drivers/usb/storage/usb.c
@@ -221,6 +221,37 @@ static int storage_resume(struct usb_interface *iface)
#endif /* CONFIG_PM */
/*
+ * The next two routines get called just before and just after
+ * a USB port reset, whether from this driver or a different one.
+ */
+
+static void storage_pre_reset(struct usb_interface *iface)
+{
+ struct us_data *us = usb_get_intfdata(iface);
+
+ US_DEBUGP("%s\n", __FUNCTION__);
+
+ /* Make sure no command runs during the reset */
+ mutex_lock(&us->dev_mutex);
+}
+
+static void storage_post_reset(struct usb_interface *iface)
+{
+ struct us_data *us = usb_get_intfdata(iface);
+
+ US_DEBUGP("%s\n", __FUNCTION__);
+
+ /* Report the reset to the SCSI core */
+ scsi_lock(us_to_host(us));
+ usb_stor_report_bus_reset(us);
+ scsi_unlock(us_to_host(us));
+
+ /* FIXME: Notify the subdrivers that they need to reinitialize
+ * the device */
+ mutex_unlock(&us->dev_mutex);
+}
+
+/*
* fill_inquiry_response takes an unsigned char array (which must
* be at least 36 characters) and populates the vendor name,
* product name, and revision fields. Then the array is copied
@@ -1002,6 +1033,8 @@ static struct usb_driver usb_storage_driver = {
.suspend = storage_suspend,
.resume = storage_resume,
#endif
+ .pre_reset = storage_pre_reset,
+ .post_reset = storage_post_reset,
.id_table = storage_usb_ids,
};
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