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>

diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c
index 4b9530a7bf6529fe8454fb02db19c089bbfa6f4c..434b1ff22e3181e28ce48baaef00ee02501fe79a 100644 (file)
--- a/drivers/dma/xilinx/xilinx_dma.c
+++ b/drivers/dma/xilinx/xilinx_dma.c
@@ -3077,7 +3077,7 @@ static int xilinx_dma_probe(struct platform_device *pdev)
                xdev->ext_addr = false;
 
        /* Set the dma mask bits */
-       dma_set_mask(xdev->dev, DMA_BIT_MASK(addr_width));
+       dma_set_mask_and_coherent(xdev->dev, DMA_BIT_MASK(addr_width));
 
        /* Initialize the DMA engine */
        xdev->common.dev = &pdev->dev;