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Commit 2d950c32 authored by Manu Gautam's avatar Manu Gautam Committed by Mayank Rana
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usb: xhci: Set bulk EP maxpacket to 8 for buggy FS devices 



Some FS devices report maxpacket size as 4 for their BULK EPs
which is incorrect as per USB specification. This results in
ep_config command to controller timing out and enumeration fails.
As minimum maxpacket size for FS is 8, hence override the same
for such devices.

CRs-fixed: 1002876
Change-Id: I70c2210b4eb93f557eef306fcbc11308b7b33e07
Signed-off-by: default avatarManu Gautam <mgautam@codeaurora.org>
Signed-off-by: default avatarMayank Rana <mrana@codeaurora.org>
parent 79d42bd7

drivers/usb/host/xhci-mem.c

+5 −0
Original line number Diff line number Diff line
@@ -1507,6 +1507,11 @@ int xhci_endpoint_init(struct xhci_hcd *xhci, 
	/* Some devices get this wrong */

	if (usb_endpoint_xfer_bulk(&ep->desc) && udev->speed == USB_SPEED_HIGH)

		max_packet = 512;



	if (usb_endpoint_xfer_bulk(&ep->desc) && udev->speed == USB_SPEED_FULL

				&& max_packet < 8)

		max_packet = 8;



	/* xHCI 1.0 and 1.1 indicates that ctrl ep avg TRB Length should be 8 */

	if (usb_endpoint_xfer_control(&ep->desc) && xhci->hci_version >= 0x100)

		avg_trb_len = 8;