linux-kernel - [PATCH 5.10 036/137] drm/i915/selftests: Fix return value check in live_breadcrumbs

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Date:   Tue,  8 Jun 2021 20:26:16 +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, Hulk Robot <hulkci@...wei.com>,
        Zhihao Cheng <chengzhihao1@...wei.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...el.com>,
        Jani Nikula <jani.nikula@...el.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 036/137] drm/i915/selftests: Fix return value check in live_breadcrumbs_smoketest()

From: Zhihao Cheng <chengzhihao1@...wei.com>

[ Upstream commit 10c1f0cbcea93beec5d3bdc02b1a3b577b4985e7 ]

In case of error, the function live_context() returns ERR_PTR() and never
returns NULL. The NULL test in the return value check should be replaced
with IS_ERR().

Fixes: 52c0fdb25c7c ("drm/i915: Replace global breadcrumbs with per-context interrupt tracking")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Zhihao Cheng <chengzhihao1@...wei.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@...el.com>
Link: https://patchwork.freedesktop.org/patch/msgid/33c46ef24cd547d0ad21dc106441491a@intel.com
[tursulin: Wrap commit text, fix Fixes: tag.]
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@...el.com>
(cherry picked from commit 8f4caef8d5401b42c6367d46c23da5e0e8111516)
Signed-off-by: Jani Nikula <jani.nikula@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/i915/selftests/i915_request.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/selftests/i915_request.c b/drivers/gpu/drm/i915/selftests/i915_request.c
index e424a6d1a68c..7a72faf29f27 100644
--- a/drivers/gpu/drm/i915/selftests/i915_request.c
+++ b/drivers/gpu/drm/i915/selftests/i915_request.c
@@ -1391,8 +1391,8 @@ static int live_breadcrumbs_smoketest(void *arg)
 
 	for (n = 0; n < smoke[0].ncontexts; n++) {
 		smoke[0].contexts[n] = live_context(i915, file);
-		if (!smoke[0].contexts[n]) {
-			ret = -ENOMEM;
+		if (IS_ERR(smoke[0].contexts[n])) {
+			ret = PTR_ERR(smoke[0].contexts[n]);
 			goto out_contexts;
 		}
 	}
-- 
2.30.2