shithub: riscv

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ref: c474179f9a6428bb81a78d20f43cf982125d5d34
parent: 2c3e60d95b0beafa25845b401ed9996ebe8100fb
author: cinap_lenrek <cinap_lenrek@felloff.net>
date: Sat May 9 22:43:39 EDT 2020

usbxhci: fix wrong control endpoint 0 output device context address

the calculation for the control endpoint0 output device context
missed the context size scaling shift, resulting in botched
stall handling as we would not read the correct endpoint status
value.

note, this calculation only affected control endpoint 0, which
was handled separately from all other endpoints.

--- a/sys/src/9/port/usbxhci.c

+++ b/sys/src/9/port/usbxhci.c

@@ -1239,7 +1239,7 @@

 	slot->nep = 1;

 	ring->slot = slot;

 	ring->doorbell = &ctlr->dba[slot->id];

-	ring->ctx = &slot->obase[8];

+	ring->ctx = &slot->obase[8<<ctlr->csz];

 	/* (input) control context */

 	w = slot->ibase;