Lars-Peter Clausen 50db2050fa dmaengine: xilinx: Introduce synchronize() callback ... The Xilinx dmaengine driver uses a tasklet to process completed descriptors and execute their callbacks. Currently consumers of the DMA channel have to no method of synchronization against this tasklet when using the Xilinx dmaengine drivers. This can lead to race conditions when the consumer frees resources that are accessed in the callback before the tasklet has finished running. It is not enough to just call dmaengine_terminal_all() since on a multi-processor system the tasklet can run concurrently to it and might call the callback after dmaengine_terminate_all() has already finished. To mitigate this issue implement the synchronize() callback for the driver, which will wait until the tasklet has finished. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Link: https://lore.kernel.org/r/20210313125311.4823-1-lars@metafoo.de Signed-off-by: Vinod Koul <vkoul@kernel.org>		2021-03-16 16:15:32 +05:30
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Makefile	dmaengine: xilinx: dpdma: Add the Xilinx DisplayPort DMA engine driver	2020-07-17 11:37:59 +05:30
xilinx_dma.c	dmaengine: xilinx: Introduce synchronize() callback	2021-03-16 16:15:32 +05:30
xilinx_dpdma.c	dmaengine: xilinx: dpdma: convert tasklets to use new tasklet_setup() API	2020-10-07 15:22:09 +05:30
zynqmp_dma.c	dmaengine: zynqmp_dma: fix kernel-doc style for tasklet	2020-10-08 15:18:46 +05:30