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Correct cache handling for xfer requests marked URQ_REQUEST: many (if not

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all uses) involve a read but usbd_start_transfer only does a PREWRITE; change
this to BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE as I'm not sure if any
users do write+read.

Reviewed by:	cognet, imp
MFC after:	1 month
This commit is contained in:
Sam Leffler 2008-03-20 16:04:13 +00:00
parent f9f98a6a18
commit 4b539f02f5
1 changed files with 2 additions and 1 deletions
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3
sys/dev/usb/usbdi.c
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@ -384,7 +384,8 @@ usbd_start_transfer(void *arg, bus_dma_segment_t *segs, int nseg, int error)
* sync the dmamap for the request data in the SETUP
* packet.
*/
bus_dmamap_sync(tag, dmap->map, BUS_DMASYNC_PREWRITE);
bus_dmamap_sync(tag, dmap->map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
} else
bus_dmamap_sync(tag, dmap->map, BUS_DMASYNC_PREREAD);
}