[PATCH] iommu: ipmmu-vmsa: avoid Wformat-security warning

[Arnd Bergmann <arnd@kernel.org>]

From: Arnd Bergmann <arnd@arndb.de>

iommu_device_sysfs_add() requires a constant format string, otherwise
a W=1 build produces a warning:

drivers/iommu/ipmmu-vmsa.c:1093:62: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security]
 1093 |         ret = iommu_device_sysfs_add(&mmu->iommu, &pdev->dev, NULL, dev_name(&pdev->dev));
      |                                                                     ^~~~~~~~~~~~~~~~~~~~
drivers/iommu/ipmmu-vmsa.c:1093:62: note: treat the string as an argument to avoid this
 1093 |         ret = iommu_device_sysfs_add(&mmu->iommu, &pdev->dev, NULL, dev_name(&pdev->dev));
      |                                                                     ^
      |                                                                     "%s",

This was an old bug but I saw it now because the code was changed as part
of commit d9d3cede4167 ("iommu/ipmmu-vmsa: Register in a sensible order").

Fixes: 7af9a5fdb9e0 ("iommu/ipmmu-vmsa: Use iommu_device_sysfs_add()/remove()")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/iommu/ipmmu-vmsa.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c
index e424b279a8cd..90341b24a811 100644
--- a/drivers/iommu/ipmmu-vmsa.c
+++ b/drivers/iommu/ipmmu-vmsa.c
@@ -1090,7 +1090,8 @@ static int ipmmu_probe(struct platform_device *pdev)
 	if (mmu->features->has_cache_leaf_nodes && ipmmu_is_root(mmu))
 		return 0;
 
-	ret = iommu_device_sysfs_add(&mmu->iommu, &pdev->dev, NULL, dev_name(&pdev->dev));
+	ret = iommu_device_sysfs_add(&mmu->iommu, &pdev->dev, NULL, "%s",
+				     dev_name(&pdev->dev));
 	if (ret)
 		return ret;
 
-- 
2.39.5