[PATCH 2/3] drm/amdgpu: change bank cache lock type to spinlock

[Yang Wang]

modify the lock type to 'spinlock' to avoid schedule issue
in interrupt context.

Signed-off-by: Yang Wang <kevinyang.wang at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_mca.c | 11 +++++------
 drivers/gpu/drm/amd/amdgpu/amdgpu_mca.h |  2 +-
 2 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mca.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_mca.c
index 0c9a271c5028..f743fd6a5a13 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mca.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mca.c
@@ -233,7 +233,7 @@ int amdgpu_mca_init(struct amdgpu_device *adev)
 
 	for (i = 0; i < ARRAY_SIZE(mca->mca_caches); i++) {
 		mca_cache = &mca->mca_caches[i];
-		mutex_init(&mca_cache->lock);
+		spin_lock_init(&mca_cache->lock);
 		amdgpu_mca_bank_set_init(&mca_cache->mca_set);
 	}
 
@@ -251,7 +251,6 @@ void amdgpu_mca_fini(struct amdgpu_device *adev)
 	for (i = 0; i < ARRAY_SIZE(mca->mca_caches); i++) {
 		mca_cache = &mca->mca_caches[i];
 		amdgpu_mca_bank_set_release(&mca_cache->mca_set);
-		mutex_destroy(&mca_cache->lock);
 	}
 }
 
@@ -456,9 +455,9 @@ static int amdgpu_mca_add_mca_set_to_cache(struct amdgpu_device *adev, enum amdg
 	struct mca_bank_cache *mca_cache = &adev->mca.mca_caches[type];
 	int ret;
 
-	mutex_lock(&mca_cache->lock);
+	spin_lock(&mca_cache->lock);
 	ret = amdgpu_mca_bank_set_merge(&mca_cache->mca_set, new);
-	mutex_unlock(&mca_cache->lock);
+	spin_unlock(&mca_cache->lock);
 
 	return ret;
 }
@@ -488,10 +487,10 @@ int amdgpu_mca_smu_log_ras_error(struct amdgpu_device *adev, enum amdgpu_ras_blo
 	}
 
 	/* dispatch mca set again if mca cache has valid data */
-	mutex_lock(&mca_cache->lock);
+	spin_lock(&mca_cache->lock);
 	if (mca_cache->mca_set.nr_entries)
 		ret = amdgpu_mca_dispatch_mca_set(adev, blk, type, &mca_cache->mca_set, err_data);
-	mutex_unlock(&mca_cache->lock);
+	spin_unlock(&mca_cache->lock);
 
 out_mca_release:
 	amdgpu_mca_bank_set_release(&mca_set);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mca.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mca.h
index e80323ff90c1..c3c184c88dad 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mca.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mca.h
@@ -84,7 +84,7 @@ struct mca_bank_set {
 
 struct mca_bank_cache {
 	struct mca_bank_set mca_set;
-	struct mutex lock;
+	spinlock_t lock;
 };
 
 struct amdgpu_mca {
-- 
2.34.1