> -----Original Message-----
> From: Shilimkar, Santosh
> Sent: Thursday, September 25, 2008 3:31 PM
> To: linux-omap@xxxxxxxxxxxxxxx
> Cc: Pandita, Vikram
> Subject: [PATCH] ARM: OMAP3: DMA: Fix for sDMA Errata 1.113
>
> From: Santosh Shilimkar <santosh.shilimkar@xxxxxx>
>
> SDMA channel is not disabled after transaction error. So
> explicitly disable it.
>
> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@xxxxxx>
> Acked By : Nishant kamat <nskamat@xxxxxx>
> ---
> Index: linux-omap-2.6/arch/arm/plat-omap/dma.c
> ===================================================================
> --- linux-omap-2.6.orig/arch/arm/plat-omap/dma.c 2008-09-23 16:41:23.000000000 +0530
> +++ linux-omap-2.6/arch/arm/plat-omap/dma.c 2008-09-25 14:54:00.162059260 +0530
> @@ -1849,9 +1849,22 @@ static int omap2_dma_handle_ch(int ch)
> printk(KERN_INFO
> "DMA synchronization event drop occurred
> with device "
> "%d\n", dma_chan[ch].dev_id);
> - if (unlikely(status & OMAP2_DMA_TRANS_ERR_IRQ))
> + if (unlikely(status & OMAP2_DMA_TRANS_ERR_IRQ)) {
> printk(KERN_INFO "DMA transaction error with
> device %d\n",
> dma_chan[ch].dev_id);
> + if (cpu_class_is_omap2()) {
> + /* Errata: sDMA Channel is not disabled
> + * after a transaction error. So we explicitely
> + * disable the channel
> + */
> + u32 ccr;
> +
> + ccr = dma_read(CCR(ch));
> + ccr &= ~OMAP_DMA_CCR_EN;
> + dma_write(ccr, CCR(ch));
> + dma_chan[ch].flags &= ~OMAP_DMA_ACTIVE;
> + }
> + }
> if (unlikely(status & OMAP2_DMA_SECURE_ERR_IRQ))
> printk(KERN_INFO "DMA secure error with device %d\n",
> dma_chan[ch].dev_id);
Tony,
What about this patch ?--
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