From 47104b0dd32cec467574822b0dc3517b3de3f0ad Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Thu, 1 Jun 2006 13:52:56 -0400 Subject: [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 Signed-off-by: Greg Kroah-Hartman --- drivers/usb/storage/usb.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) (limited to 'drivers/usb/storage/usb.c') diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c index 0142fe82f6b8..e232c7c89909 100644 --- a/drivers/usb/storage/usb.c +++ b/drivers/usb/storage/usb.c @@ -220,6 +220,37 @@ 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, @@ -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, }; -- cgit v1.2.3