linux-kernel - [PATCH] platform/x86/amd/pmf: Fix missing error code in amd_pmf_init_smart

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Date: Mon, 26 Feb 2024 06:40:10 -0800
From: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
To: Shyam Sundar S K <Shyam-sundar.S-k@....com>,
        Hans de Goede <hdegoede@...hat.com>,
        Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
        Mario Limonciello <mario.limonciello@....com>,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: kernel-janitors@...r.kernel.org, dan.carpenter@...aro.org,
        Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
Subject: [PATCH] platform/x86/amd/pmf: Fix missing error code in amd_pmf_init_smart_pc()

On the error path, assign -ENOMEM to ret when memory allocation of
"dev->prev_data" fails.

Fixes: e70961505808 ("platform/x86/amd/pmf: Fixup error handling for amd_pmf_init_smart_pc()")
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@...cle.com>
---
This is based on static analysis with smatch, only compile tested
---
 drivers/platform/x86/amd/pmf/tee-if.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/x86/amd/pmf/tee-if.c b/drivers/platform/x86/amd/pmf/tee-if.c
index 8527dca9cf56..dcbe8f85e122 100644
--- a/drivers/platform/x86/amd/pmf/tee-if.c
+++ b/drivers/platform/x86/amd/pmf/tee-if.c
@@ -458,8 +458,10 @@ int amd_pmf_init_smart_pc(struct amd_pmf_dev *dev)
 	amd_pmf_hex_dump_pb(dev);
 
 	dev->prev_data = kzalloc(sizeof(*dev->prev_data), GFP_KERNEL);
-	if (!dev->prev_data)
+	if (!dev->prev_data) {
+		ret = -ENOMEM;
 		goto error;
+	}
 
 	ret = amd_pmf_start_policy_engine(dev);
 	if (ret)
-- 
2.39.3