linux-kernel - RE: [PATCH] gpu: drm: swsmu: fix error return code of smu_v11_0_set_allowed

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Message-ID: <DM6PR12MB26198FF9499CD3ADCCF93546E4969@DM6PR12MB2619.namprd12.prod.outlook.com>
Date:   Fri, 5 Mar 2021 04:02:49 +0000
From:   "Quan, Evan" <Evan.Quan@....com>
To:     Jia-Ju Bai <baijiaju1990@...il.com>,
        "Deucher, Alexander" <Alexander.Deucher@....com>,
        "Koenig, Christian" <Christian.Koenig@....com>,
        "airlied@...ux.ie" <airlied@...ux.ie>,
        "daniel@...ll.ch" <daniel@...ll.ch>,
        "Zhang, Hawking" <Hawking.Zhang@....com>,
        "Wang, Kevin(Yang)" <Kevin1.Wang@....com>,
        "Gao, Likun" <Likun.Gao@....com>
CC:     "amd-gfx@...ts.freedesktop.org" <amd-gfx@...ts.freedesktop.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] gpu: drm: swsmu: fix error return code of
 smu_v11_0_set_allowed_mask()

[AMD Public Use]

Thanks. Reviewed-by: Evan Quan <evan.quan@....com>

-----Original Message-----
From: Jia-Ju Bai <baijiaju1990@...il.com> 
Sent: Friday, March 5, 2021 11:54 AM
To: Deucher, Alexander <Alexander.Deucher@....com>; Koenig, Christian <Christian.Koenig@....com>; airlied@...ux.ie; daniel@...ll.ch; Quan, Evan <Evan.Quan@....com>; Zhang, Hawking <Hawking.Zhang@....com>; Wang, Kevin(Yang) <Kevin1.Wang@....com>; Gao, Likun <Likun.Gao@....com>
Cc: amd-gfx@...ts.freedesktop.org; dri-devel@...ts.freedesktop.org; linux-kernel@...r.kernel.org; Jia-Ju Bai <baijiaju1990@...il.com>
Subject: [PATCH] gpu: drm: swsmu: fix error return code of smu_v11_0_set_allowed_mask()

When bitmap_empty() or feature->feature_num triggers an error, no error return code of smu_v11_0_set_allowed_mask() is assigned.
To fix this bug, ret is assigned with -EINVAL as error return code.

Reported-by: TOTE Robot <oslab@...nghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1990@...il.com>
---
 drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c
index 90585461a56e..82731a932308 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c
@@ -747,8 +747,10 @@ int smu_v11_0_set_allowed_mask(struct smu_context *smu)
 	int ret = 0;
 	uint32_t feature_mask[2];
 
-	if (bitmap_empty(feature->allowed, SMU_FEATURE_MAX) || feature->feature_num < 64)
+	if (bitmap_empty(feature->allowed, SMU_FEATURE_MAX) || feature->feature_num < 64) {
+		ret = -EINVAL;
 		goto failed;
+	}
 
 	bitmap_copy((unsigned long *)feature_mask, feature->allowed, 64);
 
--
2.17.1