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Commit 7a7b562d authored by Hans de Goede's avatar Hans de Goede Committed by Sarah Sharp
Browse files

usb: Clear host_endpoint->streams when implicitly freeing streams 



If streams are still allocated on device-reset or set-interface then the hcd
code implictly frees the streams. Clear host_endpoint->streams in this case
so that if a driver later tries to re-allocate them it won't run afoul of the
device already having streams check in usb_alloc_streams().

Note normally streams still being allocated at reset / set-intf  would be a
driver bug, but this can happen without it being a driver bug on reset-resume.

Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarSarah Sharp <sarah.a.sharp@linux.intel.com>
parent f7920884

drivers/usb/core/hub.c

+4 −1
Original line number Diff line number Diff line
@@ -5131,7 +5131,7 @@ static int usb_reset_and_verify_device(struct usb_device *udev) 
	struct usb_hcd			*hcd = bus_to_hcd(udev->bus);

	struct usb_device_descriptor	descriptor = udev->descriptor;

	struct usb_host_bos		*bos;

	int 				i, ret = 0;

	int				i, j, ret = 0;

	int				port1 = udev->portnum;



	if (udev->state == USB_STATE_NOTATTACHED ||
@@ -5257,6 +5257,9 @@ static int usb_reset_and_verify_device(struct usb_device *udev) 
				ret);

			goto re_enumerate;

		}

		/* Resetting also frees any allocated streams */

		for (j = 0; j < intf->cur_altsetting->desc.bNumEndpoints; j++)

			intf->cur_altsetting->endpoint[j].streams = 0;

	}



done:

drivers/usb/core/message.c

+5 −2
Original line number Diff line number Diff line
@@ -1293,8 +1293,7 @@ int usb_set_interface(struct usb_device *dev, int interface, int alternate) 
	struct usb_interface *iface;

	struct usb_host_interface *alt;

	struct usb_hcd *hcd = bus_to_hcd(dev->bus);

	int ret;

	int manual = 0;

	int i, ret, manual = 0;

	unsigned int epaddr;

	unsigned int pipe;
@@ -1329,6 +1328,10 @@ int usb_set_interface(struct usb_device *dev, int interface, int alternate) 
		mutex_unlock(hcd->bandwidth_mutex);

		return -ENOMEM;

	}

	/* Changing alt-setting also frees any allocated streams */

	for (i = 0; i < iface->cur_altsetting->desc.bNumEndpoints; i++)

		iface->cur_altsetting->endpoint[i].streams = 0;



	ret = usb_hcd_alloc_bandwidth(dev, NULL, iface->cur_altsetting, alt);

	if (ret < 0) {

		dev_info(&dev->dev, "Not enough bandwidth for altsetting %d\n",