Author: hselasky
Date: Fri Sep 20 10:56:13 2019
New Revision: 352554
URL: https://svnweb.freebsd.org/changeset/base/352554
Log:
The maximum TD size is 31 and not 15.
Found at: EuroBSDcon 2019
MFC after: 1 week
Sponsored by: Mellanox Technologies
Modified:
head/sys/dev/usb/controller/xhci.c
Modified: head/sys/dev/usb/controller/xhci.c
==============================================================================
--- head/sys/dev/usb/controller/xhci.c Fri Sep 20 09:45:38 2019
(r352553)
+++ head/sys/dev/usb/controller/xhci.c Fri Sep 20 10:56:13 2019
(r352554)
@@ -2003,7 +2003,7 @@ restart:
/* clear TD SIZE to zero, hence this is the last TRB */
/* remove chain bit because this is the last data TRB in the chain */
- td->td_trb[td->ntrb - 1].dwTrb2 &= ~htole32(XHCI_TRB_2_TDSZ_SET(15));
+ td->td_trb[td->ntrb - 1].dwTrb2 &= ~htole32(XHCI_TRB_2_TDSZ_SET(31));
td->td_trb[td->ntrb - 1].dwTrb3 &= ~htole32(XHCI_TRB_3_CHAIN_BIT);
/* remove CHAIN-BIT from last LINK TRB */
td->td_trb[td->ntrb].dwTrb3 &= ~htole32(XHCI_TRB_3_CHAIN_BIT);
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