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usb: xhci: Set 'Error Count' to 0 for isoch endpoints

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Per xHCI spec, 'Error Count' should be set to 0 for isoch endpoints.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Bin Meng 2017-09-18 06:40:49 -07:00 committed by Marek Vasut
parent fa483b2c75
commit ab2b727dc0
1 changed files with 5 additions and 1 deletions
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6
drivers/usb/host/xhci.c
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@ -511,6 +511,7 @@ static int xhci_set_configuration(struct usb_device *udev)
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 @@ static int xhci_set_configuration(struct usb_device *udev)
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;