dmaengine: dw-edma: Fix scatter-gather address calculation
commit5.4-rM2-2.2.x-imx-squashed05655541c9
upstream. Fix the source and destination physical address calculation of a peripheral device on scatter-gather implementation. This issue manifested during tests using a 64 bits architecture system. The abnormal behavior wasn't visible before due to all previous tests were done using 32 bits architecture system, that masked his effect. Fixes:e63d79d1ff
("dmaengine: Add Synopsys eDMA IP core driver") Cc: stable@vger.kernel.org Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com> Link: https://lore.kernel.org/r/8d3ab7e2ba96563fe3495b32f60077fffb85307d.1597327623.git.gustavo.pimentel@synopsys.com Signed-off-by: Vinod Koul <vkoul@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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9f4ab0172e
commit
f84804af09
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@ -391,7 +391,7 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer)
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if (xfer->cyclic) {
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burst->dar = xfer->xfer.cyclic.paddr;
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} else {
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burst->dar = sg_dma_address(sg);
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burst->dar = dst_addr;
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/* Unlike the typical assumption by other
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* drivers/IPs the peripheral memory isn't
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* a FIFO memory, in this case, it's a
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@ -399,14 +399,13 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer)
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* and destination addresses are increased
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* by the same portion (data length)
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*/
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src_addr += sg_dma_len(sg);
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}
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} else {
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burst->dar = dst_addr;
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if (xfer->cyclic) {
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burst->sar = xfer->xfer.cyclic.paddr;
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} else {
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burst->sar = sg_dma_address(sg);
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burst->sar = src_addr;
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/* Unlike the typical assumption by other
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* drivers/IPs the peripheral memory isn't
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* a FIFO memory, in this case, it's a
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@ -414,12 +413,14 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer)
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* and destination addresses are increased
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* by the same portion (data length)
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*/
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dst_addr += sg_dma_len(sg);
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}
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}
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if (!xfer->cyclic)
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if (!xfer->cyclic) {
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src_addr += sg_dma_len(sg);
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dst_addr += sg_dma_len(sg);
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sg = sg_next(sg);
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}
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}
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return vchan_tx_prep(&chan->vc, &desc->vd, xfer->flags);
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