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| author | Mathias Nyman <mathias.nyman@linux.intel.com> | 2022-11-30 12:19:43 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-11-30 14:10:48 +0300 |
| commit | a1575120972ecd7baa6af6a69e4e7ea9213bde7c (patch) | |
| tree | dc5f64e7f0771163d10eb636cb80ebaed9110ba4 /drivers/usb/host/xhci-ring.c | |
| parent | c3bbacd61baace2f4fbab17012c3d149df2d50f1 (diff) | |
| download | linux-a1575120972ecd7baa6af6a69e4e7ea9213bde7c.tar.xz | |
xhci: Prevent infinite loop in transaction errors recovery for streams
Make sure to also limit the amount of soft reset retries for transaction
errors on streams in cases where the transaction error event doesn't point
to any specific TRB.
In these cases we don't know the TRB or stream ring, but we do know which
endpoint had the error.
To keep error counting simple and functional, move the current err_count
from ring structure to endpoint structure.
Cc: stable@vger.kernel.org
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20221130091944.2171610-6-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/xhci-ring.c')
| -rw-r--r-- | drivers/usb/host/xhci-ring.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c index f6af479188e8..039ec9734fcd 100644 --- a/drivers/usb/host/xhci-ring.c +++ b/drivers/usb/host/xhci-ring.c @@ -2458,7 +2458,7 @@ static int process_bulk_intr_td(struct xhci_hcd *xhci, struct xhci_virt_ep *ep, switch (trb_comp_code) { case COMP_SUCCESS: - ep_ring->err_count = 0; + ep->err_count = 0; /* handle success with untransferred data as short packet */ if (ep_trb != td->last_trb || remaining) { xhci_warn(xhci, "WARN Successful completion on short TX\n"); @@ -2484,7 +2484,7 @@ static int process_bulk_intr_td(struct xhci_hcd *xhci, struct xhci_virt_ep *ep, break; case COMP_USB_TRANSACTION_ERROR: if (xhci->quirks & XHCI_NO_SOFT_RETRY || - (ep_ring->err_count++ > MAX_SOFT_RETRY) || + (ep->err_count++ > MAX_SOFT_RETRY) || le32_to_cpu(slot_ctx->tt_info) & TT_SLOT) break; @@ -2565,8 +2565,14 @@ static int handle_tx_event(struct xhci_hcd *xhci, case COMP_USB_TRANSACTION_ERROR: case COMP_INVALID_STREAM_TYPE_ERROR: case COMP_INVALID_STREAM_ID_ERROR: - xhci_handle_halted_endpoint(xhci, ep, 0, NULL, - EP_SOFT_RESET); + xhci_dbg(xhci, "Stream transaction error ep %u no id\n", + ep_index); + if (ep->err_count++ > MAX_SOFT_RETRY) + xhci_handle_halted_endpoint(xhci, ep, 0, NULL, + EP_HARD_RESET); + else + xhci_handle_halted_endpoint(xhci, ep, 0, NULL, + EP_SOFT_RESET); goto cleanup; case COMP_RING_UNDERRUN: case COMP_RING_OVERRUN: |