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USB: xHCI: Missed Service Error Event process

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This patch adds mechanism to process Missed Service Error Event.
Sometimes the xHC is unable to process the isoc TDs in time, it will
generate Missed Service Error Event. In this case some TDs on the ring are
not processed and missed. When encounter a Missed Servce Error Event, set
the skip flag of the ep, and process the missed TDs until reach the next
processed TD, then clear the skip flag.

Signed-off-by: Andiry Xu <andiry.xu@amd.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Andiry Xu
2010-07-22 15:23:25 -07:00
committed by Greg Kroah-Hartman
parent 986a92d448
commit d18240db79
3 changed files with 115 additions and 48 deletions
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1
drivers/usb/host/xhci-mem.c
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@@ -1124,6 +1124,7 @@ int xhci_endpoint_init(struct xhci_hcd *xhci,
virt_dev->num_rings_cached--;
xhci_reinit_cached_ring(xhci, virt_dev->eps[ep_index].new_ring);
}
virt_dev->eps[ep_index].skip = false;
ep_ring = virt_dev->eps[ep_index].new_ring;
ep_ctx->deq = ep_ring->first_seg->dma | ep_ring->cycle_state;