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drm/exynos: fix return value check in lowlevel_buffer_allocate()
In case of error, the function drm_prime_pages_to_sg() returns ERR_PTR() and never returns NULL. The NULL test in the return value check should be replaced with IS_ERR(). Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Inki Dae <inki.dae@samsung.com>
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@ -91,9 +91,9 @@ static int lowlevel_buffer_allocate(struct drm_device *dev,
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}
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buf->sgt = drm_prime_pages_to_sg(buf->pages, nr_pages);
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if (!buf->sgt) {
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if (IS_ERR(buf->sgt)) {
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DRM_ERROR("failed to get sg table.\n");
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ret = -ENOMEM;
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ret = PTR_ERR(buf->sgt);
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goto err_free_attrs;
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}
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