OpenBSD / src / lcRTvzB / Transfers that span multiple TRBs which wrap around the ring and

OpenBSD/src lcRTvzB — sys/dev/usb xhci.c

2019-02-21 22:44:44 UTC by patrick on ⎇

HEAD

   Transfers that span multiple TRBs which wrap around the ring and
   thus have the Link TRB inbetween must have the Chain Bit set in the
   Link TRB.  Otherwise xHCI controllers might think that the transfer
   ends at that point.

   Fixes an issue that was most prominently seen as Invalid CSW error
   when using umass0 on octeon and i.MX8M.

   Tested by visa@
   ok mpi@

Version	Delta		File
1.91	+9	-5	sys/dev/usb/xhci.c
	+9	-5	1 files

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