From 44ab30b056149bd59dd7989a593dd25ead6007fd Mon Sep 17 00:00:00 2001
From: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Date: Thu, 6 Jan 2022 11:03:26 +0800
Subject: [PATCH] drm/panfrost: Check for error num after setting mask
Git-commit: 44ab30b056149bd59dd7989a593dd25ead6007fd
Patch-mainline: v5.18-rc1
References: git-fixes
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.
Fixes: f3ba91228e8e ("drm/panfrost: Add initial panfrost driver")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
[steve: fix Fixes: line]
Reviewed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220106030326.2620942-1-jiasheng@iscas.ac.cn
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/gpu/drm/panfrost/panfrost_gpu.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/panfrost/panfrost_gpu.c b/drivers/gpu/drm/panfrost/panfrost_gpu.c
index bbe628b306ee..f8355de6e335 100644
--- a/drivers/gpu/drm/panfrost/panfrost_gpu.c
+++ b/drivers/gpu/drm/panfrost/panfrost_gpu.c
@@ -360,8 +360,11 @@ int panfrost_gpu_init(struct panfrost_device *pfdev)
panfrost_gpu_init_features(pfdev);
- dma_set_mask_and_coherent(pfdev->dev,
+ err = dma_set_mask_and_coherent(pfdev->dev,
DMA_BIT_MASK(FIELD_GET(0xff00, pfdev->features.mmu_features)));
+ if (err)
+ return err;
+
dma_set_max_seg_size(pfdev->dev, UINT_MAX);
irq = platform_get_irq_byname(to_platform_device(pfdev->dev), "gpu");
--
2.31.1