This is a note to let you know that I've just added the patch titled drm/panfrost: Check for error num after setting mask to the 5.17-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: drm-panfrost-check-for-error-num-after-setting-mask.patch and it can be found in the queue-5.17 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 3f12acecd0257591f08fcdfe5a5bb92edf755548 Author: Jiasheng Jiang <jiasheng@xxxxxxxxxxx> Date: Thu Jan 6 11:03:26 2022 +0800 drm/panfrost: Check for error num after setting mask [ Upstream commit 44ab30b056149bd59dd7989a593dd25ead6007fd ] 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@xxxxxxxxxxx> [Steve: fix Fixes: line] Reviewed-by: Steven Price <steven.price@xxxxxxx> Signed-off-by: Steven Price <steven.price@xxxxxxx> Link: https://patchwork.freedesktop.org/patch/msgid/20220106030326.2620942-1-jiasheng@xxxxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> 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");