Commit a80c203c authored by Mathias Nyman's avatar Mathias Nyman Committed by Greg Kroah-Hartman

xhci: fix giving back URB with incorrect status regression in 5.12

5.12 kernel changes how xhci handles cancelled URBs and halted
endpoints. Among these changes cancelled and stalled URBs are no longer
given back before they are cleared from xHC hardware cache.

These changes unfortunately cleared the -EPIPE status of a stalled
transfer in one case before giving bak the URB, causing a USB card reader
to fail from working.

Fixes: 674f8438 ("xhci: split handling halted endpoints into two steps")
Cc: <stable@vger.kernel.org> # 5.12
Reported-by: default avatarPeter Ganzhorn <peter.ganzhorn@googlemail.com>
Tested-by: default avatarPeter Ganzhorn <peter.ganzhorn@googlemail.com>
Signed-off-by: default avatarMathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20210525074100.1154090-2-mathias.nyman@linux.intel.comSigned-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent e6809703
...@@ -828,14 +828,10 @@ static void xhci_giveback_invalidated_tds(struct xhci_virt_ep *ep) ...@@ -828,14 +828,10 @@ static void xhci_giveback_invalidated_tds(struct xhci_virt_ep *ep)
list_for_each_entry_safe(td, tmp_td, &ep->cancelled_td_list, list_for_each_entry_safe(td, tmp_td, &ep->cancelled_td_list,
cancelled_td_list) { cancelled_td_list) {
/*
* Doesn't matter what we pass for status, since the core will
* just overwrite it (because the URB has been unlinked).
*/
ring = xhci_urb_to_transfer_ring(ep->xhci, td->urb); ring = xhci_urb_to_transfer_ring(ep->xhci, td->urb);
if (td->cancel_status == TD_CLEARED) if (td->cancel_status == TD_CLEARED)
xhci_td_cleanup(ep->xhci, td, ring, 0); xhci_td_cleanup(ep->xhci, td, ring, td->status);
if (ep->xhci->xhc_state & XHCI_STATE_DYING) if (ep->xhci->xhc_state & XHCI_STATE_DYING)
return; return;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment