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From: Dan Carpenter <dan.carpenter@oracle.com>
To: David Woodhouse <dwmw2@infradead.org>,
	Megha Dey <megha.dey@linux.intel.com>
Cc: kernel-janitors@vger.kernel.org, iommu@lists.linux-foundation.org
Subject: [PATCH] iommu/vt-d: Unlock on error paths
Date: Thu, 12 Mar 2020 11:37:30 +0000	[thread overview]
Message-ID: <20200312113730.GF20562@mwanda> (raw)

There were a couple places where we need to unlock before returning.

Fixes: 91391b919e19 ("iommu/vt-d: Populate debugfs if IOMMUs are detected")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 drivers/iommu/intel-iommu-debugfs.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/intel-iommu-debugfs.c b/drivers/iommu/intel-iommu-debugfs.c
index 8d24c4d85cc2..6a495b103972 100644
--- a/drivers/iommu/intel-iommu-debugfs.c
+++ b/drivers/iommu/intel-iommu-debugfs.c
@@ -289,11 +289,12 @@ static int dmar_translation_struct_show(struct seq_file *m, void *unused)
 		sts = dmar_readl(iommu->reg + DMAR_GSTS_REG);
 		if (!(sts & DMA_GSTS_TES)) {
 			seq_puts(m, "DMA Remapping is not enabled\n");
-			return 0;
+			goto unlock;
 		}
 		root_tbl_walk(m, iommu);
 		seq_putc(m, '\n');
 	}
+unlock:
 	rcu_read_unlock();
 
 	return 0;
@@ -444,7 +445,7 @@ static int ir_translation_struct_show(struct seq_file *m, void *unused)
 		sts = dmar_readl(iommu->reg + DMAR_GSTS_REG);
 		if (!(sts & DMA_GSTS_IRES)) {
 			seq_puts(m, "Interrupt Remapping is not enabled\n");
-			return 0;
+			goto unlock;
 		}
 
 		if (iommu->ir_table) {
@@ -475,6 +476,7 @@ static int ir_translation_struct_show(struct seq_file *m, void *unused)
 		}
 		seq_putc(m, '\n');
 	}
+unlock:
 	rcu_read_unlock();
 
 	return 0;
-- 
2.20.1

WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <dan.carpenter@oracle.com>
To: David Woodhouse <dwmw2@infradead.org>,
	Megha Dey <megha.dey@linux.intel.com>
Cc: kernel-janitors@vger.kernel.org, iommu@lists.linux-foundation.org
Subject: [PATCH] iommu/vt-d: Unlock on error paths
Date: Thu, 12 Mar 2020 14:37:30 +0300	[thread overview]
Message-ID: <20200312113730.GF20562@mwanda> (raw)

There were a couple places where we need to unlock before returning.

Fixes: 91391b919e19 ("iommu/vt-d: Populate debugfs if IOMMUs are detected")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 drivers/iommu/intel-iommu-debugfs.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/intel-iommu-debugfs.c b/drivers/iommu/intel-iommu-debugfs.c
index 8d24c4d85cc2..6a495b103972 100644
--- a/drivers/iommu/intel-iommu-debugfs.c
+++ b/drivers/iommu/intel-iommu-debugfs.c
@@ -289,11 +289,12 @@ static int dmar_translation_struct_show(struct seq_file *m, void *unused)
 		sts = dmar_readl(iommu->reg + DMAR_GSTS_REG);
 		if (!(sts & DMA_GSTS_TES)) {
 			seq_puts(m, "DMA Remapping is not enabled\n");
-			return 0;
+			goto unlock;
 		}
 		root_tbl_walk(m, iommu);
 		seq_putc(m, '\n');
 	}
+unlock:
 	rcu_read_unlock();
 
 	return 0;
@@ -444,7 +445,7 @@ static int ir_translation_struct_show(struct seq_file *m, void *unused)
 		sts = dmar_readl(iommu->reg + DMAR_GSTS_REG);
 		if (!(sts & DMA_GSTS_IRES)) {
 			seq_puts(m, "Interrupt Remapping is not enabled\n");
-			return 0;
+			goto unlock;
 		}
 
 		if (iommu->ir_table) {
@@ -475,6 +476,7 @@ static int ir_translation_struct_show(struct seq_file *m, void *unused)
 		}
 		seq_putc(m, '\n');
 	}
+unlock:
 	rcu_read_unlock();
 
 	return 0;
-- 
2.20.1

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             reply	other threads:[~2020-03-12 11:37 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-12 11:37 Dan Carpenter [this message]
2020-03-12 11:37 ` [PATCH] iommu/vt-d: Unlock on error paths Dan Carpenter
2020-03-12 12:02 ` Lu Baolu
2020-03-12 12:02   ` Lu Baolu
2020-03-12 12:55   ` Dan Carpenter
2020-03-12 12:55     ` Dan Carpenter

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