linux-kernel - [PATCH 5.14 13/48] drm/amdkfd: handle svm migrate init error

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Message-Id: <20211008112720.466324257@linuxfoundation.org>
Date:   Fri,  8 Oct 2021 13:27:49 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Philip Yang <Philip.Yang@....com>,
        Felix Kuehling <Felix.Kuehling@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.14 13/48] drm/amdkfd: handle svm migrate init error

From: Philip Yang <Philip.Yang@....com>

[ Upstream commit 7d6687200a939176847090bbde5cb79a82792a2f ]

If svm migration init failed to create pgmap for device memory, set
pgmap type to 0 to disable device SVM support capability.

Signed-off-by: Philip Yang <Philip.Yang@....com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c
index dab290a4d19d..165e0ebb619d 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c
@@ -894,6 +894,9 @@ int svm_migrate_init(struct amdgpu_device *adev)
 	r = devm_memremap_pages(adev->dev, pgmap);
 	if (IS_ERR(r)) {
 		pr_err("failed to register HMM device memory\n");
+
+		/* Disable SVM support capability */
+		pgmap->type = 0;
 		devm_release_mem_region(adev->dev, res->start,
 					res->end - res->start + 1);
 		return PTR_ERR(r);
-- 
2.33.0