thompsa 2008-07-28 16:09:22 UTC
FreeBSD src repository
Modified files: (Branch: RELENG_7)
sys/dev/usb ehci.c ohci.c
Log:
SVN rev 180899 on 2008-07-28 16:09:22Z by thompsa
MFC r177459
Workaround design botch in usb: blindly mixing bus_dma with PIO does not
work on architectures with a write-back cache as the PIO writes end up
in the cache which the sync(BUS_DMASYNC_POSTREAD) in usb_transfer_complete
then discards; compensate in the xfer methods that do PIO by pushing the
writes out of the cache before usb_transfer_complete is called.
Revision Changes Path
1.56.2.2 +16 -0 src/sys/dev/usb/ehci.c
1.170.2.1 +16 -0 src/sys/dev/usb/ohci.c
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