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authorKenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>2009-12-08 20:56:41 -0500
committerTony Luck <tony.luck@intel.com>2009-12-14 19:03:36 -0500
commit09b366b78c9602f53344c269eac608fd6e24d670 (patch)
tree1352edcc54a17157ba4e57e8dcd765d30df7889a /arch/ia64/include
parent3ea6b3d0e6d0ffd91c0f8cadeb69b7133c038b32 (diff)
[IA64] preallocate IA64_IRQ_MOVE_VECTOR
Previously, we tried to use IA64_DEF_FIRST_DEVICE_VECTOR (0x30) as the IA64_IRQ_MOVE_VECTOR. However, we allocate other IRQs from the device vector range, so there's no guarantee that IA64_DEF_FIRST_DEVICE_VECTOR will still be available when we register IA64_IRQ_MOVE_VECTOR. This patch statically allocates 0x30 for IA64_IRQ_MOVE_VECTOR and removes it from the device vector range. Without this patch, we crash on machines like the HP rx3600 that use vector 48 (0x30) as the ACPI SCI interrupt: kernel BUG at arch/ia64/kernel/irq_ia64.c:647! swapper[0]: bugcheck! 0 [1] Modules linked in: Pid: 0, CPU 0, comm: swapper psr : 00001010084a2018 ifs : 800000000000030e ip : [<a000000100012ed0>] Not tainted (2.6.32-rc8-00184-gd5d4ec8) ip is at ia64_native_register_percpu_irq+0x110/0x1e0 Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Tested-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Tested-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/include')
-rw-r--r--arch/ia64/include/asm/hw_irq.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/ia64/include/asm/hw_irq.h b/arch/ia64/include/asm/hw_irq.h
index 91619b31dbf5..bf2e37493e04 100644
--- a/arch/ia64/include/asm/hw_irq.h
+++ b/arch/ia64/include/asm/hw_irq.h
@@ -59,7 +59,13 @@ typedef u16 ia64_vector;
59extern int ia64_first_device_vector; 59extern int ia64_first_device_vector;
60extern int ia64_last_device_vector; 60extern int ia64_last_device_vector;
61 61
62#if defined(CONFIG_SMP) && (defined(CONFIG_IA64_GENERIC) || defined (CONFIG_IA64_DIG))
63/* Reserve the lower priority vector than device vectors for "move IRQ" IPI */
64#define IA64_IRQ_MOVE_VECTOR 0x30 /* "move IRQ" IPI */
65#define IA64_DEF_FIRST_DEVICE_VECTOR 0x31
66#else
62#define IA64_DEF_FIRST_DEVICE_VECTOR 0x30 67#define IA64_DEF_FIRST_DEVICE_VECTOR 0x30
68#endif
63#define IA64_DEF_LAST_DEVICE_VECTOR 0xe7 69#define IA64_DEF_LAST_DEVICE_VECTOR 0xe7
64#define IA64_FIRST_DEVICE_VECTOR ia64_first_device_vector 70#define IA64_FIRST_DEVICE_VECTOR ia64_first_device_vector
65#define IA64_LAST_DEVICE_VECTOR ia64_last_device_vector 71#define IA64_LAST_DEVICE_VECTOR ia64_last_device_vector