usb: xhci: Set 'Error Count' to 0 for isoch endpoints
Per xHCI spec, 'Error Count' should be set to 0 for isoch endpoints.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index dfb188d..93737b0 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -511,6 +511,7 @@
unsigned int mult;
unsigned int max_burst;
unsigned int avg_trb_len;
+ unsigned int err_count = 0;
out_ctx = virt_dev->out_ctx;
in_ctx = virt_dev->in_ctx;
@@ -588,9 +589,12 @@
cpu_to_le32(MAX_PACKET
(get_unaligned(&endpt_desc->wMaxPacketSize)));
+ /* Allow 3 retries for everything but isoc, set CErr = 3 */
+ if (!usb_endpoint_xfer_isoc(endpt_desc))
+ err_count = 3;
ep_ctx[ep_index]->ep_info2 |=
cpu_to_le32(MAX_BURST(max_burst) |
- ((3 & ERROR_COUNT_MASK) << ERROR_COUNT_SHIFT));
+ ERROR_COUNT(err_count));
trb_64 = (uintptr_t)
virt_dev->eps[ep_index].ring->enqueue;