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xHCI: Cleanup isoc transfer ring when TD length mismatch found

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When a TD length mismatch is found during isoc TRB enqueue, it directly
returns -EINVAL. However, isoc transfer is partially enqueued at this time,
and the ring should be cleared.

This should be backported to kernels as old as 2.6.36, which contain the
commit 522989a27c7badb608155b1f1dea3487ed431f74 "xhci: Fix failed
enqueue in the middle of isoch TD."

Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Andiry Xu 2012-01-18 17:47:12 +08:00 committed by Sarah Sharp
parent 7c24814f7e
commit cf840551a8
1 changed files with 2 additions and 1 deletions
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3
drivers/usb/host/xhci-ring.c
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@ -3324,7 +3324,8 @@ static int xhci_queue_isoc_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
/* Check TD length */
if (running_total != td_len) {
xhci_err(xhci, "ISOC TD length unmatch\n");
return -EINVAL;
ret = -EINVAL;
goto cleanup;
}
}