Never retry after xacterr. The DMA engine cannot handle that properly
and may result in wrong transfer count and hang.
Signed-off-by: Aaro Koskinen <aaro.koski...@iki.fi>
---
drivers/staging/octeon-usb/octeon-hcd.c | 38 +++++----------------------------
1 file changed, 5 insertions(+), 33 deletions(-)
diff --git a/drivers/staging/octeon-usb/octeon-hcd.c
b/drivers/staging/octeon-usb/octeon-hcd.c
index ce96b20..05530e4 100644
--- a/drivers/staging/octeon-usb/octeon-hcd.c
+++ b/drivers/staging/octeon-usb/octeon-hcd.c
@@ -2685,40 +2685,12 @@ static int cvmx_usb_poll_channel(struct cvmx_usb_state
*usb, int channel)
CVMX_USB_COMPLETE_STALL);
} else if (usbc_hcint.s.xacterr) {
/*
- * We know at least one packet worked if we get a ACK or NAK.
- * Reset the retry counter
+ * XactErr as a response means the device signaled
+ * something wrong with the transfer. For example, PID
+ * toggle errors cause these.
*/
- if (usbc_hcint.s.nak || usbc_hcint.s.ack)
- transaction->retries = 0;
- transaction->retries++;
- if (transaction->retries > MAX_RETRIES) {
- /*
- * XactErr as a response means the device signaled
- * something wrong with the transfer. For example, PID
- * toggle errors cause these
- */
- cvmx_usb_perform_complete(usb, pipe, transaction,
- CVMX_USB_COMPLETE_XACTERR);
- } else {
- /*
- * If this was a split then clear our split in progress
- * marker
- */
- if (usb->active_split == transaction)
- usb->active_split = NULL;
- /*
- * Rewind to the beginning of the transaction by anding
- * off the split complete bit
- */
- transaction->stage &= ~1;
- pipe->split_sc_frame = -1;
- pipe->next_tx_frame += pipe->interval;
- if (pipe->next_tx_frame < usb->frame_number)
- pipe->next_tx_frame =
- usb->frame_number + pipe->interval -
- (usb->frame_number -
- pipe->next_tx_frame) % pipe->interval;
- }
+ cvmx_usb_perform_complete(usb, pipe, transaction,
+ CVMX_USB_COMPLETE_XACTERR);
} else if (usbc_hcint.s.bblerr) {
/* Babble Error (BblErr) */
cvmx_usb_perform_complete(usb, pipe, transaction,
--
2.2.0
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