linux-kernel - [PATCH] iommu/vt-d: remove unneeded validity check on dev

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Message-Id: <20220313150337.593650-1-usama.anjum@collabora.com>
Date:   Sun, 13 Mar 2022 20:03:37 +0500
From:   Muhammad Usama Anjum <usama.anjum@...labora.com>
To:     David Woodhouse <dwmw2@...radead.org>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>
Cc:     Muhammad Usama Anjum <usama.anjum@...labora.com>,
        kernel@...labora.com, iommu@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] iommu/vt-d: remove unneeded validity check on dev

dev_iommu_priv_get() is being used at the top of this function which
dereferences dev. Dev cannot be NULL after this. Remove the validity
check on dev and simplify the code.

Signed-off-by: Muhammad Usama Anjum <usama.anjum@...labora.com>
---
 drivers/iommu/intel/iommu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index df5c62ecf942b..f79edbbd651a4 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -2502,7 +2502,7 @@ static struct dmar_domain *dmar_insert_one_dev_info(struct intel_iommu *iommu,
 		}
 	}
 
-	if (dev && domain_context_mapping(domain, dev)) {
+	if (domain_context_mapping(domain, dev)) {
 		dev_err(dev, "Domain context map failed\n");
 		dmar_remove_one_dev_info(dev);
 		return NULL;
-- 
2.30.2