linux-brain/drivers/dma/xilinx
Radhey Shyam Pandey 2c89a856fa dmaengine: xilinx_dma: Set DMA mask for coherent APIs
[ Upstream commit aac6c0f90799d66b8989be1e056408f33fd99fe6 ]

The xilinx dma driver uses the consistent allocations, so for correct
operation also set the DMA mask for coherent APIs. It fixes the below
kernel crash with dmatest client when DMA IP is configured with 64-bit
address width and linux is booted from high (>4GB) memory.

Call trace:
[  489.531257]  dma_alloc_from_pool+0x8c/0x1c0
[  489.535431]  dma_direct_alloc+0x284/0x330
[  489.539432]  dma_alloc_attrs+0x80/0xf0
[  489.543174]  dma_pool_alloc+0x160/0x2c0
[  489.547003]  xilinx_cdma_prep_memcpy+0xa4/0x180
[  489.551524]  dmatest_func+0x3cc/0x114c
[  489.555266]  kthread+0x124/0x130
[  489.558486]  ret_from_fork+0x10/0x3c
[  489.562051] ---[ end trace 248625b2d596a90a ]---

Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Reviewed-by: Harini Katakam <harini.katakam@xilinx.com>
Link: https://lore.kernel.org/r/1629363528-30347-1-git-send-email-radhey.shyam.pandey@xilinx.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-09-26 14:07:11 +02:00
..
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
xilinx_dma.c dmaengine: xilinx_dma: Set DMA mask for coherent APIs 2021-09-26 14:07:11 +02:00
zynqmp_dma.c dmaengine: zynqmp_dma: Fix PM reference leak in zynqmp_dma_alloc_chan_resourc() 2021-06-30 08:47:45 -04:00