ASoC: fsl_dma: Pass the proper device for dma mapping routines
The driver should pass a device that specifies internal DMA ops, but substream->pcm is just a logical device, and thus doesn't have arch- specific dma callbacks, therefore following bug appears: Freescale Synchronous Serial Interface (SSI) ASoC Driver ------------[ cut here ]------------ kernel BUG at arch/powerpc/include/asm/dma-mapping.h:237! Oops: Exception in kernel mode, sig: 5 [#1] ... NIP [c02259c4] snd_malloc_dev_pages+0x58/0xac LR [c0225c74] snd_dma_alloc_pages+0xf8/0x108 Call Trace: [df02bde0] [df02be2c] 0xdf02be2c (unreliable) [df02bdf0] [c0225c74] snd_dma_alloc_pages+0xf8/0x108 [df02be10] [c023a100] fsl_dma_new+0x68/0x124 [df02be20] [c02342ac] soc_new_pcm+0x1bc/0x234 [df02bea0] [c02343dc] snd_soc_new_pcms+0xb8/0x148 [df02bed0] [c023824c] cs4270_probe+0x34/0x124 [df02bef0] [c0232fe8] snd_soc_instantiate_card+0x1a4/0x2f4 [df02bf20] [c0233164] snd_soc_instantiate_cards+0x2c/0x68 [df02bf30] [c0234704] snd_soc_register_platform+0x60/0x80 [df02bf50] [c03d5664] fsl_soc_platform_init+0x18/0x28 ... This patch fixes the issue by using card's device instead. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-by: Timur Tabi <timur@freescale.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
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@ -300,7 +300,7 @@ static int fsl_dma_new(struct snd_card *card, struct snd_soc_dai *dai,
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if (!card->dev->coherent_dma_mask)
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card->dev->coherent_dma_mask = fsl_dma_dmamask;
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ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, pcm->dev,
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ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, card->dev,
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fsl_dma_hardware.buffer_bytes_max,
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&pcm->streams[0].substream->dma_buffer);
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if (ret) {
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@ -310,7 +310,7 @@ static int fsl_dma_new(struct snd_card *card, struct snd_soc_dai *dai,
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return -ENOMEM;
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}
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ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, pcm->dev,
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ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, card->dev,
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fsl_dma_hardware.buffer_bytes_max,
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&pcm->streams[1].substream->dma_buffer);
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if (ret) {
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@ -418,7 +418,7 @@ static int fsl_dma_open(struct snd_pcm_substream *substream)
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return -EBUSY;
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}
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dma_private = dma_alloc_coherent(substream->pcm->dev,
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dma_private = dma_alloc_coherent(substream->pcm->card->dev,
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sizeof(struct fsl_dma_private), &ld_buf_phys, GFP_KERNEL);
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if (!dma_private) {
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dev_err(substream->pcm->card->dev,
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@ -445,7 +445,7 @@ static int fsl_dma_open(struct snd_pcm_substream *substream)
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dev_err(substream->pcm->card->dev,
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"can't register ISR for IRQ %u (ret=%i)\n",
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dma_private->irq, ret);
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dma_free_coherent(substream->pcm->dev,
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dma_free_coherent(substream->pcm->card->dev,
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sizeof(struct fsl_dma_private),
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dma_private, dma_private->ld_buf_phys);
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return ret;
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@ -778,13 +778,13 @@ static int fsl_dma_close(struct snd_pcm_substream *substream)
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free_irq(dma_private->irq, dma_private);
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if (dma_private->ld_buf_phys) {
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dma_unmap_single(substream->pcm->dev,
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dma_unmap_single(substream->pcm->card->dev,
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dma_private->ld_buf_phys,
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sizeof(dma_private->link), DMA_TO_DEVICE);
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}
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/* Deallocate the fsl_dma_private structure */
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dma_free_coherent(substream->pcm->dev,
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dma_free_coherent(substream->pcm->card->dev,
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sizeof(struct fsl_dma_private),
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dma_private, dma_private->ld_buf_phys);
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substream->runtime->private_data = NULL;
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