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Commit 34f11e59 authored by Hans de Goede's avatar Hans de Goede Committed by Sarah Sharp
Browse files

uas: Add uas_find_endpoints() helper function 



This is a preparation patch for adding better descriptor validation.

Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarSarah Sharp <sarah.a.sharp@linux.intel.com>
parent 97172a66

drivers/usb/storage/uas.c

+23 −11
Original line number Diff line number Diff line
@@ -898,16 +898,11 @@ static int uas_switch_interface(struct usb_device *udev, 
			intf->altsetting[0].desc.bInterfaceNumber, alt);

}



static void uas_configure_endpoints(struct uas_dev_info *devinfo)

static int uas_find_endpoints(struct usb_host_interface *alt,

			      struct usb_host_endpoint *eps[])

{

	struct usb_host_endpoint *eps[4] = { };

	struct usb_interface *intf = devinfo->intf;

	struct usb_device *udev = devinfo->udev;

	struct usb_host_endpoint *endpoint = intf->cur_altsetting->endpoint;

	unsigned i, n_endpoints = intf->cur_altsetting->desc.bNumEndpoints;



	devinfo->uas_sense_old = 0;

	devinfo->cmnd = NULL;

	struct usb_host_endpoint *endpoint = alt->endpoint;

	unsigned i, n_endpoints = alt->desc.bNumEndpoints;



	for (i = 0; i < n_endpoints; i++) {

		unsigned char *extra = endpoint[i].extra;
@@ -924,12 +919,29 @@ static void uas_configure_endpoints(struct uas_dev_info *devinfo) 
		}

	}



	if (!eps[0] || !eps[1] || !eps[2] || !eps[3])

		return -ENODEV;



	return 0;

}



static void uas_configure_endpoints(struct uas_dev_info *devinfo)

{

	struct usb_host_endpoint *eps[4] = { };

	struct usb_device *udev = devinfo->udev;

	int r;



	devinfo->uas_sense_old = 0;

	devinfo->cmnd = NULL;



	r = uas_find_endpoints(devinfo->intf->cur_altsetting, eps);



	/*

	 * Assume that if we didn't find a control pipe descriptor, we're

	 * Assume that if we didn't find a proper set of descriptors, we're

	 * using a device with old firmware that happens to be set up like

	 * this.

	 */

	if (!eps[0]) {

	if (r != 0) {

		devinfo->cmd_pipe = usb_sndbulkpipe(udev, 1);

		devinfo->status_pipe = usb_rcvbulkpipe(udev, 1);

		devinfo->data_in_pipe = usb_rcvbulkpipe(udev, 2);