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Sat, 10 Jan 2026 08:48:11 -0800 (PST) Received: from localhost.localdomain ([202.120.237.35]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-121f248bb6esm19509083c88.12.2026.01.10.08.48.07 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Sat, 10 Jan 2026 08:48:11 -0800 (PST) From: Miaoqian Lin To: Alex Deucher , =?UTF-8?q?Christian=20K=C3=B6nig?= , David Airlie , Simona Vetter , Hawking Zhang , Tao Zhou , YiPeng Chai , Lijo Lazar , amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Cc: linmq006@gmail.com, stable@vger.kernel.org Subject: [PATCH] drm/amd/ras: use proper error checking for kthread_run return Date: Sun, 11 Jan 2026 00:47:55 +0800 Message-Id: <20260110164800.39203-1-linmq006@gmail.com> X-Mailer: git-send-email 2.39.5 (Apple Git-154) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" kthread_run() returns an error pointer on failure, not NULL. Replace NULL check with IS_ERR and use PTR_ERR to propagate the real error from kthread_run. Fixes: ea61341b9014 ("drm/amd/ras: Add thread to handle ras events") Cc: stable@vger.kernel.org Signed-off-by: Miaoqian Lin --- drivers/gpu/drm/amd/ras/rascore/ras_process.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/ras/rascore/ras_process.c b/drivers/gpu/dr= m/amd/ras/rascore/ras_process.c index 3267dcdb169c..c001074c8c56 100644 --- a/drivers/gpu/drm/amd/ras/rascore/ras_process.c +++ b/drivers/gpu/drm/amd/ras/rascore/ras_process.c @@ -248,9 +248,10 @@ int ras_process_init(struct ras_core_context *ras_core) =20 ras_proc->ras_process_thread =3D kthread_run(ras_process_thread, (void *)ras_core, "ras_process_thread"); - if (!ras_proc->ras_process_thread) { + if (IS_ERR(ras_proc->ras_process_thread)) { RAS_DEV_ERR(ras_core->dev, "Failed to create ras_process_thread.\n"); - ret =3D -ENOMEM; + ret =3D PTR_ERR(ras_proc->ras_process_thread); + ras_proc->ras_process_thread =3D NULL; goto err; } =20 --=20 2.39.5 (Apple Git-154)