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| author | Adrian Hunter <adrian.hunter@nokia.com> | 2010-11-24 13:23:21 +0200 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2011-01-19 14:41:21 -0800 |
| commit | 4fb699b408b559107f1e1b47d176d33361446b69 (patch) | |
| tree | d9143f8d15980a77df872d2c5c564bdc58885e13 | |
| parent | 35a78fa48678926464138aab3a4dede4503befb5 (diff) | |
| download | linux-stable-4fb699b408b559107f1e1b47d176d33361446b69.tar.gz linux-stable-4fb699b408b559107f1e1b47d176d33361446b69.tar.bz2 linux-stable-4fb699b408b559107f1e1b47d176d33361446b69.zip | |
omap: DMA: clear interrupt status correctly
When clearing the DMA channel, clear all status bits.
When handling a DMA interrupt, clear only the interrupt
status bits that have been read and are passed to the
channel's interrupt handler, not every status bit.
Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: G, Manjunath Kondaiah <manjugk@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
| -rw-r--r-- | arch/arm/plat-omap/dma.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c index c4b2b478b1a5..85363084cc1a 100644 --- a/arch/arm/plat-omap/dma.c +++ b/arch/arm/plat-omap/dma.c @@ -53,7 +53,7 @@ enum { DMA_CHAIN_STARTED, DMA_CHAIN_NOTSTARTED }; #endif #define OMAP_DMA_ACTIVE 0x01 -#define OMAP2_DMA_CSR_CLEAR_MASK 0xffe +#define OMAP2_DMA_CSR_CLEAR_MASK 0xffffffff #define OMAP_FUNC_MUX_ARM_BASE (0xfffe1000 + 0xec) @@ -1873,7 +1873,7 @@ static int omap2_dma_handle_ch(int ch) printk(KERN_INFO "DMA misaligned error with device %d\n", dma_chan[ch].dev_id); - p->dma_write(OMAP2_DMA_CSR_CLEAR_MASK, CSR, ch); + p->dma_write(status, CSR, ch); p->dma_write(1 << ch, IRQSTATUS_L0, ch); /* read back the register to flush the write */ p->dma_read(IRQSTATUS_L0, ch); @@ -1893,10 +1893,9 @@ static int omap2_dma_handle_ch(int ch) OMAP_DMA_CHAIN_INCQHEAD(chain_id); status = p->dma_read(CSR, ch); + p->dma_write(status, CSR, ch); } - p->dma_write(status, CSR, ch); - if (likely(dma_chan[ch].callback != NULL)) dma_chan[ch].callback(ch, status, dma_chan[ch].data); |