The patch titled
at73c213: fix DMA size at the end of DMA buffer
has been removed from the -mm tree. Its filename was
at73c213-fix-dma-size-at-the-end-of-dma-buffer.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: at73c213: fix DMA size at the end of DMA buffer
From: Atsushi Nemoto <anemo@xxxxxxxxxxxxx>
The interrupt handler always provide runtime->period_size data, but it should
provide additional residual data when the pointer back to zero.
This patch fixes periodic click noise when runtime->buffer_size was not
multiple of runtime->period_size.
Signed-off-by: Atsushi Nemoto <anemo@xxxxxxxxxxxxx>
Cc: Hans-Christian Egtvedt <hcegtvedt@xxxxxxxxx>
Cc: Jaroslav Kysela <perex@xxxxxxxx>
Cc: Haavard Skinnemoen <hskinnemoen@xxxxxxxxx>
Cc: Andrew Victor <avictor.za@xxxxxxxxx>
Cc: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
sound/spi/at73c213.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff -puN sound/spi/at73c213.c~at73c213-fix-dma-size-at-the-end-of-dma-buffer sound/spi/at73c213.c
--- a/sound/spi/at73c213.c~at73c213-fix-dma-size-at-the-end-of-dma-buffer
+++ a/sound/spi/at73c213.c
@@ -356,6 +356,7 @@ static irqreturn_t snd_at73c213_interrup
u32 status;
int offset;
int block_size;
+ int size;
int next_period;
int retval = IRQ_NONE;
@@ -373,11 +374,14 @@ static irqreturn_t snd_at73c213_interrup
next_period = 0;
offset = block_size * next_period;
+ size = runtime->period_size * runtime->channels;
+ if (next_period == runtime->periods - 1)
+ size += (runtime->buffer_size % runtime->period_size)
+ * runtime->channels;
ssc_writel(chip->ssc->regs, PDC_TNPR,
(long)runtime->dma_addr + offset);
- ssc_writel(chip->ssc->regs, PDC_TNCR,
- runtime->period_size * runtime->channels);
+ ssc_writel(chip->ssc->regs, PDC_TNCR, size);
retval = IRQ_HANDLED;
}
_
Patches currently in -mm which might be from anemo@xxxxxxxxxxxxx are
git-alsa-tiwai.patch
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