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From: Felix Kuehling <Felix.Kuehling@amd.com>
To: dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org
Subject: [PATCH 2/2] drm/amdkfd: Cleanup kfd_process if init_cwsr_apu fails
Date: Fri, 12 Feb 2021 01:40:34 -0500	[thread overview]
Message-ID: <20210212064034.29912-2-Felix.Kuehling@amd.com> (raw)
In-Reply-To: <20210212064034.29912-1-Felix.Kuehling@amd.com>

If init_cwsr_apu fails, we currently leave the kfd_process structure in
place anyway. The next kfd_open will then succeed, using the existing
kfd_process structure. Fix that by cleaning up the kfd_process after a
failure in init_cwsr_apu.

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_process.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
index 145cd0a17d50..a4d7682289bb 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
@@ -775,10 +775,8 @@ struct kfd_process *kfd_create_process(struct file *filep)
 			goto out;
 
 		ret = kfd_process_init_cwsr_apu(process, filep);
-		if (ret) {
-			process = ERR_PTR(ret);
-			goto out;
-		}
+		if (ret)
+			goto out_destroy;
 
 		if (!procfs.kobj)
 			goto out;
@@ -826,6 +824,14 @@ struct kfd_process *kfd_create_process(struct file *filep)
 	mutex_unlock(&kfd_processes_mutex);
 
 	return process;
+
+out_destroy:
+	hash_del_rcu(&process->kfd_processes);
+	mutex_unlock(&kfd_processes_mutex);
+	synchronize_srcu(&kfd_processes_srcu);
+	/* kfd_process_free_notifier will trigger the cleanup */
+	mmu_notifier_put(&process->mmu_notifier);
+	return ERR_PTR(ret);
 }
 
 struct kfd_process *kfd_get_process(const struct task_struct *thread)
-- 
2.17.1

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dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

WARNING: multiple messages have this Message-ID (diff)
From: Felix Kuehling <Felix.Kuehling@amd.com>
To: dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org
Subject: [PATCH 2/2] drm/amdkfd: Cleanup kfd_process if init_cwsr_apu fails
Date: Fri, 12 Feb 2021 01:40:34 -0500	[thread overview]
Message-ID: <20210212064034.29912-2-Felix.Kuehling@amd.com> (raw)
In-Reply-To: <20210212064034.29912-1-Felix.Kuehling@amd.com>

If init_cwsr_apu fails, we currently leave the kfd_process structure in
place anyway. The next kfd_open will then succeed, using the existing
kfd_process structure. Fix that by cleaning up the kfd_process after a
failure in init_cwsr_apu.

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_process.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
index 145cd0a17d50..a4d7682289bb 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
@@ -775,10 +775,8 @@ struct kfd_process *kfd_create_process(struct file *filep)
 			goto out;
 
 		ret = kfd_process_init_cwsr_apu(process, filep);
-		if (ret) {
-			process = ERR_PTR(ret);
-			goto out;
-		}
+		if (ret)
+			goto out_destroy;
 
 		if (!procfs.kobj)
 			goto out;
@@ -826,6 +824,14 @@ struct kfd_process *kfd_create_process(struct file *filep)
 	mutex_unlock(&kfd_processes_mutex);
 
 	return process;
+
+out_destroy:
+	hash_del_rcu(&process->kfd_processes);
+	mutex_unlock(&kfd_processes_mutex);
+	synchronize_srcu(&kfd_processes_srcu);
+	/* kfd_process_free_notifier will trigger the cleanup */
+	mmu_notifier_put(&process->mmu_notifier);
+	return ERR_PTR(ret);
 }
 
 struct kfd_process *kfd_get_process(const struct task_struct *thread)
-- 
2.17.1

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amd-gfx mailing list
amd-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/amd-gfx

  reply	other threads:[~2021-02-12  6:41 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-12  6:40 [PATCH 1/2] drm/amdkfd: Use mmu_notifier_get Felix Kuehling
2021-02-12  6:40 ` Felix Kuehling
2021-02-12  6:40 ` Felix Kuehling [this message]
2021-02-12  6:40   ` [PATCH 2/2] drm/amdkfd: Cleanup kfd_process if init_cwsr_apu fails Felix Kuehling
2021-02-16 19:50   ` philip yang
2021-02-16 19:50     ` philip yang

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