Messages in this thread Patch in this message | | | Subject | [PATCH 1 of 2] x86_64: Calgary IOMMU - fix off by one error | Date | Tue, 18 Jul 2006 18:11:17 +0300 | From | Muli Ben-Yehuda <> |
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# HG changeset patch # User Muli Ben-Yehuda <muli@il.ibm.com> # Date 1153234988 -10800 # Node ID 81635ec2e677165285c2a483958899217f9631d8 # Parent 1b8d63e34819bac5b6aac0048ef79004fb243db9 x86_64: Calgary IOMMU - fix off by one error
Fixed off-by-one error in detect_calgary and calgary_init which will cause arrays to overflow. Also, removed impossible to hit BUG_ON.
Signed-Off-By: Jon Mason <jdmason@us.ibm.com> Signed-Off-By: Muli Ben-Yehuda <muli@il.ibm.com>
diff -r 1b8d63e34819 -r 81635ec2e677 arch/x86_64/kernel/pci-calgary.c --- a/arch/x86_64/kernel/pci-calgary.c Sat Jul 15 22:03:19 2006 +0000 +++ b/arch/x86_64/kernel/pci-calgary.c Tue Jul 18 18:03:08 2006 +0300 @@ -812,7 +812,7 @@ static int __init calgary_init(void) int i, ret = -ENODEV; struct pci_dev *dev = NULL; - for (i = 0; i <= num_online_nodes() * MAX_NUM_OF_PHBS; i++) { + for (i = 0; i < num_online_nodes() * MAX_NUM_OF_PHBS; i++) { dev = pci_get_device(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CALGARY, dev); @@ -890,9 +890,8 @@ void __init detect_calgary(void) specified_table_size = determine_tce_table_size(end_pfn * PAGE_SIZE); for (bus = 0, table_idx = 0; - bus <= num_online_nodes() * MAX_PHB_BUS_NUM; + bus < num_online_nodes() * MAX_PHB_BUS_NUM; bus++) { - BUG_ON(bus > MAX_NUMNODES * MAX_PHB_BUS_NUM); if (read_pci_config(bus, 0, 0, 0) != PCI_VENDOR_DEVICE_ID_CALGARY) continue; if (test_bit(bus, translation_disabled)) { @@ -1002,7 +1001,7 @@ static int __init calgary_parse_options( if (p == endp) break; - if (bridge <= (num_online_nodes() * MAX_PHB_BUS_NUM)) { + if (bridge < (num_online_nodes() * MAX_PHB_BUS_NUM)) { printk(KERN_INFO "Calgary: disabling " "translation for PHB 0x%x\n", bridge); set_bit(bridge, translation_disabled); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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