From b8f4fe66a560b5ccbb4d4d0d2df356a5d9b98b83 Mon Sep 17 00:00:00 2001 From: Muli Ben-Yehuda Date: Tue, 26 Sep 2006 10:52:31 +0200 Subject: [PATCH] [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 Signed-off-by: Jon Mason Signed-off-by: Andi Kleen --- arch/x86_64/kernel/pci-calgary.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/arch/x86_64/kernel/pci-calgary.c b/arch/x86_64/kernel/pci-calgary.c index b2182c936305..6c5da1d813f3 100644 --- a/arch/x86_64/kernel/pci-calgary.c +++ b/arch/x86_64/kernel/pci-calgary.c @@ -658,11 +658,12 @@ static int __init calgary_setup_tar(struct pci_dev *dev, void __iomem *bbar) 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 @@ static void __init calgary_free_tar(struct pci_dev *dev) 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 @@ error: 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); } -- 2.20.1