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sh: guard cookie consistency across termination in the DMA driver 

If all descriptors on a channel are terminated or the channel is released,
update the completed cookie counter to match the last cookie. This prevents
inconsistency warning on resumed DMA operation.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
wifi-calibration
Guennadi Liakhovetski 2010-05-21 15:30:12 +00:00 committed by Paul Mundt
parent 7a5c106a0e
commit 9255f1deec
1 changed files with 4 additions and 0 deletions
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4
drivers/dma/shdma.c
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@ -722,6 +722,10 @@ static void sh_dmae_chan_ld_cleanup(struct sh_dmae_chan *sh_chan, bool all)
{
while (__ld_cleanup(sh_chan, all))
;
if (all)
/* Terminating - forgive uncompleted cookies */
sh_chan->completed_cookie = sh_chan->common.cookie;
}
static void sh_chan_xfer_ld_queue(struct sh_dmae_chan *sh_chan)