linux-kernel - [PATCH] iommufd: Fix uninitialized rc in iommufd_access

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Message-ID: <20250227200729.85030-1-nicolinc@nvidia.com>
Date: Thu, 27 Feb 2025 12:07:29 -0800
From: Nicolin Chen <nicolinc@...dia.com>
To: <jgg@...dia.com>
CC: <kevin.tian@...el.com>, <iommu@...ts.linux.dev>,
	<linux-kernel@...r.kernel.org>
Subject: [PATCH] iommufd: Fix uninitialized rc in iommufd_access_rw()

Reported by smatch:
drivers/iommu/iommufd/device.c:1392 iommufd_access_rw() error: uninitialized symbol 'rc'.

Fixes: 8d40205f6093 ("iommufd: Add kAPI toward external drivers for kernel access")
Cc: stable@...r.kernel.org
Reported-by: kernel test robot <lkp@...el.com>
Reported-by: Dan Carpenter <error27@...il.com>
Closes: https://lore.kernel.org/r/202502271339.a2nWr9UA-lkp@intel.com/
[nicolinc: can't find an original report but only in "old smatch warnings"]
Signed-off-by: Nicolin Chen <nicolinc@...dia.com>
---
 drivers/iommu/iommufd/device.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/iommufd/device.c b/drivers/iommu/iommufd/device.c
index 6dccbf7217f5..b812ae40f382 100644
--- a/drivers/iommu/iommufd/device.c
+++ b/drivers/iommu/iommufd/device.c
@@ -1348,7 +1348,7 @@ int iommufd_access_rw(struct iommufd_access *access, unsigned long iova,
 	struct io_pagetable *iopt;
 	struct iopt_area *area;
 	unsigned long last_iova;
-	int rc;
+	int rc = 0;
 
 	if (!length)
 		return -EINVAL;
-- 
2.34.1