linux-kernel - [PATCH 5.4 155/320] drm/lima: fix warning when CONFIG_DEBUG_SG=y & CONFIG_DMA_API

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Message-Id: <20220124183958.901709370@linuxfoundation.org>
Date:   Mon, 24 Jan 2022 19:42:19 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Vasily Khoruzhick <anarsoul@...il.com>,
        Roman Stratiienko <r.stratiienko@...il.com>,
        Qiang Yu <yuq825@...il.com>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 155/320] drm/lima: fix warning when CONFIG_DEBUG_SG=y & CONFIG_DMA_API_DEBUG=y

From: Qiang Yu <yuq825@...il.com>

[ Upstream commit 89636a06fa2ee7826a19c39c19a9bc99ab9340a9 ]

Otherwise get following warning:

DMA-API: lima 1c40000.gpu: mapping sg segment longer than device claims to support [len=4149248] [max=65536]

See: https://gitlab.freedesktop.org/mesa/mesa/-/issues/5496

Reviewed-by: Vasily Khoruzhick <anarsoul@...il.com>
Reported-by: Roman Stratiienko <r.stratiienko@...il.com>
Signed-off-by: Qiang Yu <yuq825@...il.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211031041604.187216-1-yuq825@gmail.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/lima/lima_device.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/lima/lima_device.c b/drivers/gpu/drm/lima/lima_device.c
index d86b8d81a483a..155971c57b2d5 100644
--- a/drivers/gpu/drm/lima/lima_device.c
+++ b/drivers/gpu/drm/lima/lima_device.c
@@ -293,6 +293,7 @@ int lima_device_init(struct lima_device *ldev)
 	struct resource *res;
 
 	dma_set_coherent_mask(ldev->dev, DMA_BIT_MASK(32));
+	dma_set_max_seg_size(ldev->dev, UINT_MAX);
 
 	err = lima_clk_init(ldev);
 	if (err)
-- 
2.34.1