[PATCH] Calgary IOMMU: fix error path memleak in calgary_free_tar
We were freeing the iommu_table and leaking the bitmap pages. Also
rename it to calgary_free_bus, which is more accurate.
Signed-off-by: Muli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: Jon Mason <jdmason@us.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>
diff --git a/arch/x86_64/kernel/pci-calgary.c b/arch/x86_64/kernel/pci-calgary.c
index b2182c9..6c5da1d 100644
--- a/arch/x86_64/kernel/pci-calgary.c
+++ b/arch/x86_64/kernel/pci-calgary.c
@@ -658,11 +658,12 @@
return 0;
}
-static void __init calgary_free_tar(struct pci_dev *dev)
+static void __init calgary_free_bus(struct pci_dev *dev)
{
u64 val64;
struct iommu_table *tbl = dev->sysdata;
void __iomem *target;
+ unsigned int bitmapsz;
target = calgary_reg(tbl->bbar, tar_offset(dev->bus->number));
val64 = be64_to_cpu(readq(target));
@@ -670,8 +671,15 @@
writeq(cpu_to_be64(val64), target);
readq(target); /* flush */
+ bitmapsz = tbl->it_size / BITS_PER_BYTE;
+ free_pages((unsigned long)tbl->it_map, get_order(bitmapsz));
+ tbl->it_map = NULL;
+
kfree(tbl);
dev->sysdata = NULL;
+
+ /* Can't free bootmem allocated memory after system is up :-( */
+ bus_info[dev->bus->number].tce_space = NULL;
}
static void calgary_watchdog(unsigned long data)
@@ -853,7 +861,7 @@
if (!bus_info[dev->bus->number].tce_space && !translate_empty_slots)
continue;
calgary_disable_translation(dev);
- calgary_free_tar(dev);
+ calgary_free_bus(dev);
pci_dev_put(dev);
}