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| author | Joerg Roedel <joerg.roedel@amd.com> | 2011-06-06 16:04:02 +0200 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2011-06-06 16:10:15 +0200 |
| commit | 0de66d5b35ee148455e268b2782873204ffdef4b (patch) | |
| tree | 536f0c7ef7d7378e4482903b932502c463e3fc2e /arch/x86/kernel/amd_iommu_init.c | |
| parent | 59c5f46fbe01a00eedf54a23789634438bb80603 (diff) | |
| download | lwn-0de66d5b35ee148455e268b2782873204ffdef4b.tar.gz lwn-0de66d5b35ee148455e268b2782873204ffdef4b.zip | |
x86/amd-iommu: Fix 3 possible endless loops
The driver contains several loops counting on an u16 value
where the exit-condition is checked against variables that
can have values up to 0xffff. In this case the loops will
never exit. This patch fixed 3 such loops.
Cc: stable@kernel.org
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'arch/x86/kernel/amd_iommu_init.c')
| -rw-r--r-- | arch/x86/kernel/amd_iommu_init.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c index 9179c21120a8..bfc8453bd98d 100644 --- a/arch/x86/kernel/amd_iommu_init.c +++ b/arch/x86/kernel/amd_iommu_init.c @@ -731,8 +731,8 @@ static void __init init_iommu_from_acpi(struct amd_iommu *iommu, { u8 *p = (u8 *)h; u8 *end = p, flags = 0; - u16 dev_i, devid = 0, devid_start = 0, devid_to = 0; - u32 ext_flags = 0; + u16 devid = 0, devid_start = 0, devid_to = 0; + u32 dev_i, ext_flags = 0; bool alias = false; struct ivhd_entry *e; @@ -887,7 +887,7 @@ static void __init init_iommu_from_acpi(struct amd_iommu *iommu, /* Initializes the device->iommu mapping for the driver */ static int __init init_iommu_devices(struct amd_iommu *iommu) { - u16 i; + u32 i; for (i = iommu->first_device; i <= iommu->last_device; ++i) set_iommu_for_device(iommu, i); @@ -1177,7 +1177,7 @@ static int __init init_memory_definitions(struct acpi_table_header *table) */ static void init_device_table(void) { - u16 devid; + u32 devid; for (devid = 0; devid <= amd_iommu_last_bdf; ++devid) { set_dev_entry_bit(devid, DEV_ENTRY_VALID); |