dmaengine i.MX dma: check sg entries for valid addresses and lengths
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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@ -243,6 +243,21 @@ static struct dma_async_tx_descriptor *imxdma_prep_slave_sg(
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else
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else
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dmamode = DMA_MODE_WRITE;
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dmamode = DMA_MODE_WRITE;
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switch (imxdmac->word_size) {
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case DMA_SLAVE_BUSWIDTH_4_BYTES:
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if (sgl->length & 3 || sgl->dma_address & 3)
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return NULL;
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break;
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case DMA_SLAVE_BUSWIDTH_2_BYTES:
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if (sgl->length & 1 || sgl->dma_address & 1)
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return NULL;
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break;
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case DMA_SLAVE_BUSWIDTH_1_BYTE:
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break;
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default:
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return NULL;
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}
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ret = imx_dma_setup_sg(imxdmac->imxdma_channel, sgl, sg_len,
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ret = imx_dma_setup_sg(imxdmac->imxdma_channel, sgl, sg_len,
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dma_length, imxdmac->per_address, dmamode);
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dma_length, imxdmac->per_address, dmamode);
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if (ret)
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if (ret)
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