linux-kernel - [PATCH] drm/test/shmem: set a DMA mask for the mock device

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Date: Mon, 26 Feb 2024 12:00:27 +0100
From: Marco Pagani <marpagan@...hat.com>
To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Daniel Vetter <daniel@...ll.ch>
Cc: Marco Pagani <marpagan@...hat.com>,
	Guenter Roeck <linux@...ck-us.net>,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] drm/test/shmem: set a DMA mask for the mock device

Set a DMA mask for the mock device to avoid warnings generated in
dma_map_sgtable().

Reported-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Marco Pagani <marpagan@...hat.com>
---
 drivers/gpu/drm/tests/drm_gem_shmem_test.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/tests/drm_gem_shmem_test.c b/drivers/gpu/drm/tests/drm_gem_shmem_test.c
index 91202e40cde9..d691b29a4312 100644
--- a/drivers/gpu/drm/tests/drm_gem_shmem_test.c
+++ b/drivers/gpu/drm/tests/drm_gem_shmem_test.c
@@ -341,11 +341,15 @@ static int drm_gem_shmem_test_init(struct kunit *test)
 {
 	struct device *dev;
 	struct drm_device *drm_dev;
+	int ret;
 
 	/* Allocate a parent device */
 	dev = drm_kunit_helper_alloc_device(test);
 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, dev);
 
+	ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(64));
+	KUNIT_EXPECT_EQ(test, ret, 0);
+
 	/*
 	 * The DRM core will automatically initialize the GEM core and create
 	 * a DRM Memory Manager object which provides an address space pool
-- 
2.43.2