PERFORCE change 100813 for review
Warner Losh
imp at FreeBSD.org
Thu Jul 6 23:01:32 UTC 2006
http://perforce.freebsd.org/chv.cgi?CH=100813
Change 100813 by imp at imp_lighthouse on 2006/07/06 23:00:51
Even when there's a timeout (especially?) you need to flush
the cache properly. Why I didn't see this before now, I don't
know.
Affected files ...
.. //depot/projects/arm/src/sys/arm/at91/uart_dev_at91usart.c#34 edit
Differences ...
==== //depot/projects/arm/src/sys/arm/at91/uart_dev_at91usart.c#34 (text+ko) ====
@@ -568,6 +568,8 @@
// Not sure if there's a race here at fast baud rates
// we need to worry about.
WR4(&sc->sc_bas, PDC_PTCR, PDC_PTCR_RXTDIS);
+ bus_dmamap_sync(atsc->dmatag, atsc->ping->map,
+ BUS_DMASYNC_POSTREAD);
len = sc->sc_rxfifosz - RD4(&sc->sc_bas, PDC_RCR);
for (i = 0; i < len; i++)
uart_rx_put(sc, atsc->ping->buffer[i]);
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