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usb: xhci: Free the right ring in xhci_add_endpoint() 

In the xhci_add_endpoint(), a new ring was allocated and saved at
xhci_virt_ep->new_ring. Hence, when error happens, we need to free
the allocated ring before returning error.

Current code frees xhci_virt_ep->ring instead of the new_ring. This
patch fixes this.

Cc: <stable@vger.kernel.org>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Lu Baolu 2017-09-18 17:39:12 +03:00 committed by Greg Kroah-Hartman
parent b2a542bbb3
commit 9821786d7c
1 changed files with 2 additions and 1 deletions
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3
drivers/usb/host/xhci.c
View File

@ -1703,7 +1703,8 @@ static int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev,
if (xhci->quirks & XHCI_MTK_HOST) {
ret = xhci_mtk_add_ep_quirk(hcd, udev, ep);
if (ret < 0) {
xhci_free_endpoint_ring(xhci, virt_dev, ep_index);
xhci_ring_free(xhci, virt_dev->eps[ep_index].new_ring);
virt_dev->eps[ep_index].new_ring = NULL;
return ret;
}
}