diff options
| author | Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | 2013-07-24 10:12:41 +0400 |
|---|---|---|
| committer | Simon Horman <horms+renesas@verge.net.au> | 2013-07-31 05:10:17 +0400 |
| commit | 3c4d9276626c93477af0b0b9d46b4dcb37e2eed2 (patch) | |
| tree | 2b0e90112bfc90870094b08cb460db443a0d2779 /drivers/dma/sh | |
| parent | 16b551dd22cc7edacb952f7a2e175f36c3aa4bdb (diff) | |
| download | linux-3c4d9276626c93477af0b0b9d46b4dcb37e2eed2.tar.xz | |
shdma: fixup sh_dmae_get_partial() calculation error
sh_desc->hw.tcr is controlling real data size,
and, register TCR is controlling data transfer count
which was xmit_shifted value of hw.tcr.
Current sh_dmae_get_partial() is calculating in different unit.
This patch fixes it.
This bug has been present since c014906a870ce70e009def0c9d170ccabeb0be63
("dmaengine: shdma: extend .device_terminate_all() to record partial
transfer"), which was added in 2.6.34-rc1.
Cc: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Diffstat (limited to 'drivers/dma/sh')
| -rw-r--r-- | drivers/dma/sh/shdma.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/dma/sh/shdma.c b/drivers/dma/sh/shdma.c index b67f45f5c271..5039fbc88254 100644 --- a/drivers/dma/sh/shdma.c +++ b/drivers/dma/sh/shdma.c @@ -400,8 +400,8 @@ static size_t sh_dmae_get_partial(struct shdma_chan *schan, shdma_chan); struct sh_dmae_desc *sh_desc = container_of(sdesc, struct sh_dmae_desc, shdma_desc); - return (sh_desc->hw.tcr - sh_dmae_readl(sh_chan, TCR)) << - sh_chan->xmit_shift; + return sh_desc->hw.tcr - + (sh_dmae_readl(sh_chan, TCR) << sh_chan->xmit_shift); } /* Called from error IRQ or NMI */ |