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| author | Chunyan Zhang <chunyan.zhang@unisoc.com> | 2023-03-31 11:31:23 +0800 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2023-03-31 10:12:51 +0200 |
| commit | 9afea57384d4ae7b2034593eac7fa76c7122762a (patch) | |
| tree | 5bd711826f720f3086f673599e47c7b690767d74 /drivers/iommu/sprd-iommu.c | |
| parent | e8d018dd0257f744ca50a729e3d042cf2ec9da65 (diff) | |
| download | linux-9afea57384d4ae7b2034593eac7fa76c7122762a.tar.gz linux-9afea57384d4ae7b2034593eac7fa76c7122762a.tar.bz2 linux-9afea57384d4ae7b2034593eac7fa76c7122762a.zip | |
iommu/sprd: Release dma buffer to avoid memory leak
When attaching to a domain, the driver would alloc a DMA buffer which
is used to store address mapping table, and it need to be released
when the IOMMU domain is freed.
Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Link: https://lore.kernel.org/r/20230331033124.864691-2-zhang.lyra@gmail.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/sprd-iommu.c')
| -rw-r--r-- | drivers/iommu/sprd-iommu.c | 29 |
1 files changed, 22 insertions, 7 deletions
diff --git a/drivers/iommu/sprd-iommu.c b/drivers/iommu/sprd-iommu.c index ae94d74b73f4..7df1f730c778 100644 --- a/drivers/iommu/sprd-iommu.c +++ b/drivers/iommu/sprd-iommu.c @@ -151,13 +151,6 @@ static struct iommu_domain *sprd_iommu_domain_alloc(unsigned int domain_type) return &dom->domain; } -static void sprd_iommu_domain_free(struct iommu_domain *domain) -{ - struct sprd_iommu_domain *dom = to_sprd_domain(domain); - - kfree(dom); -} - static void sprd_iommu_first_vpn(struct sprd_iommu_domain *dom) { struct sprd_iommu_device *sdev = dom->sdev; @@ -230,6 +223,28 @@ static void sprd_iommu_hw_en(struct sprd_iommu_device *sdev, bool en) sprd_iommu_update_bits(sdev, reg_cfg, mask, 0, val); } +static void sprd_iommu_cleanup(struct sprd_iommu_domain *dom) +{ + size_t pgt_size; + + /* Nothing need to do if the domain hasn't been attached */ + if (!dom->sdev) + return; + + pgt_size = sprd_iommu_pgt_size(&dom->domain); + dma_free_coherent(dom->sdev->dev, pgt_size, dom->pgt_va, dom->pgt_pa); + dom->sdev = NULL; + sprd_iommu_hw_en(dom->sdev, false); +} + +static void sprd_iommu_domain_free(struct iommu_domain *domain) +{ + struct sprd_iommu_domain *dom = to_sprd_domain(domain); + + sprd_iommu_cleanup(dom); + kfree(dom); +} + static int sprd_iommu_attach_device(struct iommu_domain *domain, struct device *dev) { |