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(parent: a1a4a16) | patch
USB: Allow transfer_buffer with transfer_dma
authorTony Lindgren <tony@atomide.com>
Fri, 4 May 2007 18:08:51 +0000 (11:08 -0700)
committerTony Lindgren <tony@atomide.com>
Fri, 4 May 2007 18:08:51 +0000 (11:08 -0700)
commit51f66c5d7f73234bca4c869562d3a8342d1ad99e
tree93a6ea112608e9b8d83061a3927737053bcdc168tree | snapshot
parenta1a4a1615abe50a702c2874814355c9f3ed59f1dcommit | diff
USB: Allow transfer_buffer with transfer_dma

Some host controller drivers may need a PIO fallback when a DMA channel
is temporarily unavailable.  This patch provides an address that such
drivers can use for PIO in those cases, and nulls that field out when
no such address is available (highmem) which should help usbmon.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
drivers/usb/core/message.c diff | blob | history
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