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31 lines
1.1 KiB
Diff
31 lines
1.1 KiB
Diff
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From 0103035be2b28a8dbb5ccc207c61043d5eb1bc18 Mon Sep 17 00:00:00 2001
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From: Jonathan Bell <jonathan@raspberrypi.com>
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Date: Fri, 10 Mar 2023 14:21:42 +0000
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Subject: [PATCH] usb: xhci: drop and add the endpoint context in
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xhci_fixup_endpoint()
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Setting both the Drop and Add bits on the input context prevents the
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corruption of split transactions seen with the BCM2711 XHCI controller,
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which is a dwc3 variant.
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This is a downstream feature that allows usbhid to restrict polling
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intervals on mice and keyboards, and was only tested on a VL805 which
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didn't complain about the fact the endpoint got added twice.
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Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>
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---
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drivers/usb/host/xhci.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/drivers/usb/host/xhci.c
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+++ b/drivers/usb/host/xhci.c
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@@ -1730,7 +1730,7 @@ static void xhci_fixup_endpoint(struct u
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return;
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}
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ctrl_ctx->add_flags = xhci_get_endpoint_flag_from_index(ep_index);
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- ctrl_ctx->drop_flags = 0;
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+ ctrl_ctx->drop_flags = ctrl_ctx->add_flags;
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spin_unlock_irqrestore(&xhci->lock, flags);
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