Because of the possible failure of the dma_supported(), the dma_set_mask_and_coherent() may return error num. Therefore, it should be better to check it and return the error if fails. Also, we can create a variable for the mask to solve the alignment issue. Fixes: 334dd38a3878 ("drm/v3d: Set dma_mask as well as coherent_dma_mask") Signed-off-by: Jiasheng Jiang <jiasheng@xxxxxxxxxxx> Reviewed-by: Melissa Wen <mwen@xxxxxxxxxx> --- Changelog: v1 -> v2 * Change 1. Add a variable for the mask. --- drivers/gpu/drm/v3d/v3d_drv.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/v3d/v3d_drv.c b/drivers/gpu/drm/v3d/v3d_drv.c index 9403c3b36aca..6407a006d6ec 100644 --- a/drivers/gpu/drm/v3d/v3d_drv.c +++ b/drivers/gpu/drm/v3d/v3d_drv.c @@ -221,6 +221,7 @@ static int v3d_platform_drm_probe(struct platform_device *pdev) int ret; u32 mmu_debug; u32 ident1; + u64 mask; v3d = devm_drm_dev_alloc(dev, &v3d_drm_driver, struct v3d_dev, drm); @@ -240,8 +241,11 @@ static int v3d_platform_drm_probe(struct platform_device *pdev) return ret; mmu_debug = V3D_READ(V3D_MMU_DEBUG_INFO); - dma_set_mask_and_coherent(dev, - DMA_BIT_MASK(30 + V3D_GET_FIELD(mmu_debug, V3D_MMU_PA_WIDTH))); + mask = DMA_BIT_MASK(30 + V3D_GET_FIELD(mmu_debug, V3D_MMU_PA_WIDTH)); + ret = dma_set_mask_and_coherent(dev, mask); + if (ret) + return ret; + v3d->va_width = 30 + V3D_GET_FIELD(mmu_debug, V3D_MMU_VA_WIDTH); ident1 = V3D_READ(V3D_HUB_IDENT1); -- 2.25.1