[PATCH 4/6] dma: coh901318_lli: set residue only if dma is in progress
From: andriy.shevchenko@linux.intel.com (Andy Shevchenko)
Date: 2013-02-12 10:58:59
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lkml
Subsystem:
dma generic offload engine subsystem, the rest · Maintainers:
Vinod Koul, Linus Torvalds
When status is DMA_SUCCESS the residue should be zero. Otherwise it's a bug. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Linus Walleij <redacted> Cc: linux-arm-kernel at lists.infradead.org --- drivers/dma/coh901318.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c
index a2f079a..797940e 100644
--- a/drivers/dma/coh901318.c
+++ b/drivers/dma/coh901318.c@@ -2355,7 +2355,9 @@ coh901318_tx_status(struct dma_chan *chan, dma_cookie_t cookie, enum dma_status ret; ret = dma_cookie_status(chan, cookie, txstate); - /* FIXME: should be conditional on ret != DMA_SUCCESS? */ + if (ret == DMA_SUCCESS) + return ret; + dma_set_residue(txstate, coh901318_get_bytes_left(chan)); if (ret == DMA_IN_PROGRESS && cohc->stopped)
--
1.7.10.4