From: Dan Carpenter <dan.carpenter@oracle.com> To: Alex Deucher <alexander.deucher-5C7GfCeVMHo@public.gmane.org>, Kevin Wang <kevin1.wang-5C7GfCeVMHo@public.gmane.org> Cc: "David (ChunMing) Zhou" <David1.Zhou-5C7GfCeVMHo@public.gmane.org>, "Chengming Gui" <Jack.Gui-5C7GfCeVMHo@public.gmane.org>, "David Airlie" <airlied-cv59FeDIM0c@public.gmane.org>, kernel-janitors-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org, "Huang Rui" <ray.huang-5C7GfCeVMHo@public.gmane.org>, "Daniel Vetter" <daniel-/w4YWyX8dFk@public.gmane.org>, "Likun Gao" <Likun.Gao-5C7GfCeVMHo@public.gmane.org>, "Christian König" <christian.koenig-5C7GfCeVMHo@public.gmane.org> Subject: [PATCH] drm/amd/powerplay: Fix double unlock bug in smu_sys_set_pp_table() Date: Thu, 21 Mar 2019 06:28:22 +0000 [thread overview] Message-ID: <20190321062822.GD21489@kadam> (raw) We already unlocked a few lines earlier so this code unlocks twice on the success path. Fixes: 5809d7420f97 ("drm/amd/powerplay: implement sysfs of pp_table for smu11 (v2)") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> --- I'm not sure what this bug looks like at runtime, but it's slightly weird that no one noticed. This is from static analysis and I haven't tested it myself. drivers/gpu/drm/amd/powerplay/amdgpu_smu.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c index 00b7c885772b..7e8c74da6a74 100644 --- a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c +++ b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c @@ -187,6 +187,8 @@ int smu_sys_set_pp_table(struct smu_context *smu, void *buf, size_t size) if (ret) pr_info("smu reset failed, ret = %d\n", ret); + return ret; + failed: mutex_unlock(&smu->mutex); return ret; -- 2.17.1
WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <dan.carpenter-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org> To: Alex Deucher <alexander.deucher-5C7GfCeVMHo@public.gmane.org>, Kevin Wang <kevin1.wang-5C7GfCeVMHo@public.gmane.org> Cc: "David (ChunMing) Zhou" <David1.Zhou-5C7GfCeVMHo@public.gmane.org>, "Chengming Gui" <Jack.Gui-5C7GfCeVMHo@public.gmane.org>, "David Airlie" <airlied-cv59FeDIM0c@public.gmane.org>, kernel-janitors-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org, "Huang Rui" <ray.huang-5C7GfCeVMHo@public.gmane.org>, "Daniel Vetter" <daniel-/w4YWyX8dFk@public.gmane.org>, "Likun Gao" <Likun.Gao-5C7GfCeVMHo@public.gmane.org>, "Christian König" <christian.koenig-5C7GfCeVMHo@public.gmane.org> Subject: [PATCH] drm/amd/powerplay: Fix double unlock bug in smu_sys_set_pp_table() Date: Thu, 21 Mar 2019 09:28:22 +0300 [thread overview] Message-ID: <20190321062822.GD21489@kadam> (raw) We already unlocked a few lines earlier so this code unlocks twice on the success path. Fixes: 5809d7420f97 ("drm/amd/powerplay: implement sysfs of pp_table for smu11 (v2)") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> --- I'm not sure what this bug looks like at runtime, but it's slightly weird that no one noticed. This is from static analysis and I haven't tested it myself. drivers/gpu/drm/amd/powerplay/amdgpu_smu.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c index 00b7c885772b..7e8c74da6a74 100644 --- a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c +++ b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c @@ -187,6 +187,8 @@ int smu_sys_set_pp_table(struct smu_context *smu, void *buf, size_t size) if (ret) pr_info("smu reset failed, ret = %d\n", ret); + return ret; + failed: mutex_unlock(&smu->mutex); return ret; -- 2.17.1 _______________________________________________ amd-gfx mailing list amd-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/amd-gfx
next reply other threads:[~2019-03-21 6:28 UTC|newest] Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-03-21 6:28 Dan Carpenter [this message] 2019-03-21 6:28 ` [PATCH] drm/amd/powerplay: Fix double unlock bug in smu_sys_set_pp_table() Dan Carpenter 2019-03-21 6:52 ` Huang, Ray 2019-03-21 6:52 ` Huang, Ray [not found] ` <MN2PR12MB3309B7C391B32EB8F5F87676EC420-rweVpJHSKTpWdvXm18W95QdYzm3356FpvxpqHgZTriW3zl9H0oFU5g@public.gmane.org> 2019-03-21 8:20 ` Julia Lawall 2019-03-21 8:20 ` Julia Lawall 2019-03-21 8:23 ` Dan Carpenter 2019-03-21 8:23 ` Dan Carpenter 2019-03-21 8:26 ` Julia Lawall 2019-03-21 8:26 ` Julia Lawall 2019-03-21 7:06 ` Wang, Kevin(Yang)
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