From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Date: Sun, 26 Sep 2021 15:07:18 +0200
Subject: iommu/tegra-smmu: Use devm_bitmap_zalloc when applicable
Git-commit: 89374244a43e51137ade6d22849ef73876f94a2b
Patch-mainline: v5.16-rc1
References: bsc#1205701

'smmu->asids' is a bitmap. So use 'devm_kzalloc()' to simplify code,
improve the semantic of the code and avoid some open-coded arithmetic in
allocator arguments.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/2c0f4da80c3b5ef83299c651f69a563034c1c6cb.1632661557.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
 drivers/iommu/tegra-smmu.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
index 0a281833f611..e900e3c46903 100644
--- a/drivers/iommu/tegra-smmu.c
+++ b/drivers/iommu/tegra-smmu.c
@@ -1079,7 +1079,6 @@ struct tegra_smmu *tegra_smmu_probe(struct device *dev,
 				    struct tegra_mc *mc)
 {
 	struct tegra_smmu *smmu;
-	size_t size;
 	u32 value;
 	int err;
 
@@ -1097,9 +1096,7 @@ struct tegra_smmu *tegra_smmu_probe(struct device *dev,
 	 */
 	mc->smmu = smmu;
 
-	size = BITS_TO_LONGS(soc->num_asids) * sizeof(long);
-
-	smmu->asids = devm_kzalloc(dev, size, GFP_KERNEL);
+	smmu->asids = devm_bitmap_zalloc(dev, soc->num_asids, GFP_KERNEL);
 	if (!smmu->asids)
 		return ERR_PTR(-ENOMEM);