At the moment iommu_free_table() only releases memory if
the table was initialized for the platform code use, i.e. it had
it_map initialized (which purpose is to track DMA memory space use).
With dynamic DMA windows, we will need to be able to release
iommu_table even if it was used for VFIO in which case it_map is NULL
so does the patch.
Signed-off-by: Alexey Kardashevskiy <aik@xxxxxxxxx>
---
Changes:
v11:
* fixed parameter checks
---
arch/powerpc/kernel/iommu.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c
index 3d47eb3..73eb39a 100644
--- a/arch/powerpc/kernel/iommu.c
+++ b/arch/powerpc/kernel/iommu.c
@@ -713,9 +713,11 @@ void iommu_free_table(struct iommu_table *tbl, const char *node_name)
unsigned long bitmap_sz;
unsigned int order;
- if (!tbl || !tbl->it_map) {
- printk(KERN_ERR "%s: expected TCE map for %s\n", __func__,
- node_name);
+ if (!tbl)
+ return;
+
+ if (!tbl->it_map) {
+ kfree(tbl);
return;
}
--
2.4.0.rc3.8.gfb3e7d5
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