linux-kernel - [PATCH] iommu/tegra-smmu: fix error checking for debugfs_create

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Message-ID: <20231025110140.2034650-1-dario.binacchi@amarulasolutions.com>
Date:   Wed, 25 Oct 2023 13:01:31 +0200
From:   Dario Binacchi <dario.binacchi@...rulasolutions.com>
To:     linux-kernel@...r.kernel.org
Cc:     Dario Binacchi <dario.binacchi@...rulasolutions.com>,
        Joerg Roedel <joro@...tes.org>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Krishna Reddy <vdumpa@...dia.com>,
        Robin Murphy <robin.murphy@....com>,
        Thierry Reding <thierry.reding@...il.com>,
        Will Deacon <will@...nel.org>, iommu@...ts.linux.dev,
        linux-tegra@...r.kernel.org
Subject: [PATCH] iommu/tegra-smmu: fix error checking for debugfs_create_dir()

The return value of debugfs_create_dir() should be checked using the
IS_ERR() function.

Signed-off-by: Dario Binacchi <dario.binacchi@...rulasolutions.com>
---

 drivers/iommu/tegra-smmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
index e445f80d0226..cd1d80c4c673 100644
--- a/drivers/iommu/tegra-smmu.c
+++ b/drivers/iommu/tegra-smmu.c
@@ -1056,7 +1056,7 @@ DEFINE_SHOW_ATTRIBUTE(tegra_smmu_clients);
 static void tegra_smmu_debugfs_init(struct tegra_smmu *smmu)
 {
 	smmu->debugfs = debugfs_create_dir("smmu", NULL);
-	if (!smmu->debugfs)
+	if (IS_ERR(smmu->debugfs))
 		return;
 
 	debugfs_create_file("swgroups", S_IRUGO, smmu->debugfs, smmu,
-- 
2.42.0