linux/drivers/dma, branch v5.5

ioat: ioat_alloc_ring() failure handling.

2019-12-27T06:36:06Z

If dma_alloc_coherent() returns NULL in ioat_alloc_ring(), ring allocation must not proceed. Until now, if the first call to dma_alloc_coherent() in ioat_alloc_ring() returned NULL, the processing could proceed, failing with NULL-pointer dereferencing further down the line. Signed-off-by: Alexander Barabash Acked-by: Dave Jiang Link: https://lore.kernel.org/r/75e9c0e84c3345d693c606c64f8b9ab5@x13pwhopdag1307.AMER.DELL.COM Signed-off-by: Vinod Koul

dmaengine: virt-dma: Fix access after free in vchan_complete()

2019-12-23T07:53:24Z

vchan_vdesc_fini() is freeing up 'vd' so the access to vd->tx_result is via already freed up memory. Move the vchan_vdesc_fini() after invoking the callback to avoid this. Fixes: 09d5b702b0f97 ("dmaengine: virt-dma: store result on dma descriptor") Signed-off-by: Peter Ujfalusi Reviewed-by: Alexandru Ardelean Link: https://lore.kernel.org/r/20191220131100.21804-1-peter.ujfalusi@ti.com Signed-off-by: Vinod Koul

dmaengine: k3dma: Avoid null pointer traversal

2019-12-23T07:51:14Z

In some cases we seem to submit two transactions in a row, which causes us to lose track of the first. If we then cancel the request, we may still get an interrupt, which traverses a null ds_run value. So try to avoid starting a new transaction if the ds_run value is set. While this patch avoids the null pointer crash, I've had some reports of the k3dma driver still getting confused, which suggests the ds_run/ds_done value handling still isn't quite right. However, I've not run into an issue recently with it so I think this patch is worth pushing upstream to avoid the crash. Signed-off-by: John Stultz [add ss tag] Link: https://lore.kernel.org/r/20191218190906.6641-1-john.stultz@linaro.org Signed-off-by: Vinod Koul

dmaengine: dma-jz4780: Also break descriptor chains on JZ4725B

2019-12-11T10:55:58Z

It turns out that the JZ4725B displays the same buggy behaviour as the JZ4740 that was described in commit f4c255f1a747 ("dmaengine: dma-jz4780: Break descriptor chains on JZ4740"). Work around it by using the same workaround previously used for the JZ4740. Fixes commit f4c255f1a747 ("dmaengine: dma-jz4780: Break descriptor chains on JZ4740") Cc: Signed-off-by: Paul Cercueil Link: https://lore.kernel.org/r/20191210165545.59690-1-paul@crapouillou.net Signed-off-by: Vinod Koul

dmaengine: Fix Kconfig indentation

2019-11-22T05:46:26Z

Adjust indentation from spaces to tab (+optional two spaces) as in coding style with command like: $ sed -e 's/^ /\t/' -i */Kconfig Signed-off-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/1574306348-29212-1-git-send-email-krzk@kernel.org Signed-off-by: Vinod Koul

dmaengine: sf-pdma: move macro to header file

2019-11-22T05:45:28Z

The place where the macro, SF_PDMA_REG_BASE(), is cause kernel-doc using wrong function declaration. Move it to header file. Signed-off-by: Green Wan Link: https://lore.kernel.org/r/20191118143554.16129-2-green.wan@sifive.com Signed-off-by: Vinod Koul

dmaengine: sf-pdma: replace /** with /* for non-function comment

2019-11-22T05:45:28Z

There are several comments starting from "/**" but not for function comment purpose. It causes kernel-doc parsing wrong string. Replace "/**" with "/*" to fix them. Signed-off-by: Green Wan Link: https://lore.kernel.org/r/20191118143554.16129-1-green.wan@sifive.com Signed-off-by: Vinod Koul

dmaengine: ti: edma: fix missed failure handling

2019-11-22T05:43:42Z

When devm_kcalloc fails, it forgets to call edma_free_slot. Replace direct return with failure handler to fix it. Fixes: 1be5336bc7ba ("dmaengine: edma: New device tree binding") Signed-off-by: Chuhong Yuan Link: https://lore.kernel.org/r/20191118073802.28424-1-hslester96@gmail.com Signed-off-by: Vinod Koul

dmaengine: mmp_pdma: add missed of_dma_controller_free

2019-11-22T05:21:30Z

The driver calls of_dma_controller_register in probe but does not free it in remove. Add the call to fix it. Signed-off-by: Chuhong Yuan Link: https://lore.kernel.org/r/20191115083153.12334-1-hslester96@gmail.com Signed-off-by: Vinod Koul

dmaengine: mmp_tdma: add missed of_dma_controller_free

2019-11-22T05:21:29Z

The driver calls of_dma_controller_register in probe but does not free it in remove. Add the call to fix it. Signed-off-by: Chuhong Yuan Link: https://lore.kernel.org/r/20191115083100.12220-1-hslester96@gmail.com Signed-off-by: Vinod Koul