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uas: Allow uas_use_uas_driver to return usb-storage flags 

uas_use_uas_driver may set some US_FL_foo flags during detection, currently
these are stored in a local variable and then throw away, but these may be
of interest to the caller, so add an extra parameter to (optionally) return
the detected flags, and use this in the uas driver.

Cc: stable@vger.kernel.org # 3.16
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Hans de Goede 2015-04-21 11:20:30 +02:00 committed by Greg Kroah-Hartman
parent b787f68c36
commit a5011d44f0
3 changed files with 9 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/usb/storage/uas-detect.h
View File

@ -51,7 +51,8 @@ static int uas_find_endpoints(struct usb_host_interface *alt,
}
static int uas_use_uas_driver(struct usb_interface *intf,
const struct usb_device_id *id)
const struct usb_device_id *id,
unsigned long *flags_ret)
{
struct usb_host_endpoint *eps[4] = { };
struct usb_device *udev = interface_to_usbdev(intf);
@ -132,5 +133,8 @@ static int uas_use_uas_driver(struct usb_interface *intf,
return 0;
}
if (flags_ret)
*flags_ret = flags;
return 1;
}

6
drivers/usb/storage/uas.c
View File

@ -887,8 +887,9 @@ static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id)
struct Scsi_Host *shost = NULL;
struct uas_dev_info *devinfo;
struct usb_device *udev = interface_to_usbdev(intf);
unsigned long dev_flags;
if (!uas_use_uas_driver(intf, id))
if (!uas_use_uas_driver(intf, id, &dev_flags))
return -ENODEV;
if (uas_switch_interface(udev, intf))
@ -910,8 +911,7 @@ static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id)
devinfo->udev = udev;
devinfo->resetting = 0;
devinfo->shutdown = 0;
devinfo->flags = id->driver_info;
usb_stor_adjust_quirks(udev, &devinfo->flags);
devinfo->flags = dev_flags;
init_usb_anchor(&devinfo->cmd_urbs);
init_usb_anchor(&devinfo->sense_urbs);
init_usb_anchor(&devinfo->data_urbs);

2
drivers/usb/storage/usb.c
View File

@ -1080,7 +1080,7 @@ static int storage_probe(struct usb_interface *intf,
/* If uas is enabled and this device can do uas then ignore it. */
#if IS_ENABLED(CONFIG_USB_UAS)
if (uas_use_uas_driver(intf, id))
if (uas_use_uas_driver(intf, id, NULL))
return -ENXIO;
#endif