1 files changed, 6 insertions(+), 4 deletions(-)
arch/x86_64/kernel/pci-calgary.c | 10 ++++++----
# HG changeset patch
# User Muli Ben-Yehuda <[email protected]>
# Date 1153737943 -10800
# Node ID a42c3826807abbeacc40649127afb5103aabdbd4
# Parent 7b1cdbc92f2c618cb59feaf472c8b76df875743d
[x86-64] Calgary IOMMU: fix reference counting of Calgary PCI devices
The pci_get_device() API decrements the reference count on the 'from'
parameter when it continues searching. Therefore, take a ref count on
Calgary bus when we initialize them in either translated or
non-translated mode.
Signed-off-by: Muli Ben-Yehuda <[email protected]>
Signed-off-by: Jon Mason <[email protected]>
diff -r 7b1cdbc92f2c -r a42c3826807a arch/x86_64/kernel/pci-calgary.c
--- a/arch/x86_64/kernel/pci-calgary.c Mon Jul 24 13:36:48 2006 +0300
+++ b/arch/x86_64/kernel/pci-calgary.c Mon Jul 24 13:45:43 2006 +0300
@@ -786,6 +786,7 @@ static inline unsigned int __init locate
static int __init calgary_init_one_nontraslated(struct pci_dev *dev)
{
+ pci_dev_get(dev);
dev->sysdata = NULL;
dev->bus->self = dev;
@@ -810,6 +811,7 @@ static int __init calgary_init_one(struc
if (ret)
goto iounmap;
+ pci_dev_get(dev);
dev->bus->self = dev;
calgary_enable_translation(dev);
@@ -836,10 +838,9 @@ static int __init calgary_init(void)
calgary_init_one_nontraslated(dev);
continue;
}
- if (!bus_info[dev->bus->number].tce_space && !translate_empty_slots) {
- pci_dev_put(dev);
+ if (!bus_info[dev->bus->number].tce_space && !translate_empty_slots)
continue;
- }
+
ret = calgary_init_one(dev);
if (ret)
goto error;
@@ -860,9 +861,10 @@ error:
}
if (!bus_info[dev->bus->number].tce_space && !translate_empty_slots)
continue;
+
calgary_disable_translation(dev);
calgary_free_bus(dev);
- pci_dev_put(dev);
+ pci_dev_put(dev); /* Undo calgary_init_one()'s pci_dev_get() */
}
return ret;
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
