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drm/simpledrm: Fix an NULL vs IS_ERR() bug

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The devm_memremap() function doesn't return NULL, it returns error
pointers.

Fixes: 9a10c7e651 ("drm/simpledrm: Add support for system memory framebuffers")
Signed-off-by: Dan Carpenter <error27@gmail.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/Y9JHzImRcUaa0mi1@kili
(cherry picked from commit e566507bf2)
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
This commit is contained in:
Dan Carpenter 2023-01-26 12:28:44 +03:00 committed by Thomas Zimmermann
parent aebd8f0c6f
commit 9bdd9424bf
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/tiny/simpledrm.c
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@ -719,8 +719,8 @@ static struct simpledrm_device *simpledrm_device_create(struct drm_driver *drv,
drm_dbg(dev, "using system memory framebuffer at %pr\n", mem);
screen_base = devm_memremap(dev->dev, mem->start, resource_size(mem), MEMREMAP_WC);
if (!screen_base)
return ERR_PTR(-ENOMEM);
if (IS_ERR(screen_base))
return screen_base;
iosys_map_set_vaddr(&sdev->screen_base, screen_base);
} else {