Documentation/usb/bulk-streams.txt says:
All stream IDs will be deallocated when the driver releases the interface, to
ensure that drivers that don't support streams will be able to use the endpoint
This commit actually implements this.
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
drivers/usb/core/driver.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index f7841d4..a44ff12 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -369,8 +369,9 @@ static int usb_unbind_interface(struct device *dev)
{
struct usb_driver *driver = to_usb_driver(dev->driver);
struct usb_interface *intf = to_usb_interface(dev);
+ struct usb_host_endpoint *ep, *eps[USB_MAXENDPOINTS];
struct usb_device *udev;
- int error, r, lpm_disable_error;
+ int i, j, error, r, lpm_disable_error;
intf->condition = USB_INTERFACE_UNBINDING;
@@ -394,6 +395,15 @@ static int usb_unbind_interface(struct device *dev)
driver->disconnect(intf);
usb_cancel_queued_reset(intf);
+ /* Free streams */
+ for (i = 0, j = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
+ ep = &intf->cur_altsetting->endpoint[i];
+ if (usb_endpoint_xfer_bulk(&ep->desc) && ep->has_streams)
+ eps[j++] = ep;
+ }
+ if (j)
+ usb_free_streams(intf, eps, j, GFP_KERNEL);
+
/* Reset other interface state.
* We cannot do a Set-Interface if the device is suspended or
* if it is prepared for a system sleep (since installing a new
--
1.8.3.1
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