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authorCliff Wickman <cpw@sgi.com>2009-11-19 17:12:43 -0600
committerIngo Molnar <mingo@elte.hu>2009-11-23 19:12:50 +0100
commite38e2af1c57c3eb5211331a5b4fcaae0c4a2a918 (patch)
tree6e3d1bda31f670f626dba2932127ed7897f33948 /arch
parentd9c2d5ac6af87b4491bff107113aaf16f6c2b2d9 (diff)
downloadop-kernel-dev-e38e2af1c57c3eb5211331a5b4fcaae0c4a2a918.zip
op-kernel-dev-e38e2af1c57c3eb5211331a5b4fcaae0c4a2a918.tar.gz
x86: SGI UV: Fix BAU initialization
A memory mapped register that affects the SGI UV Broadcast Assist Unit's interrupt handling may sometimes be unintialized. Remove the condition on its initialization, as that condition can be randomly satisfied by a hardware reset. Signed-off-by: Cliff Wickman <cpw@sgi.com> Cc: <stable@kernel.org> LKML-Reference: <E1NBGB9-0005nU-Dp@eag09.americas.sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/tlb_uv.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/x86/kernel/tlb_uv.c b/arch/x86/kernel/tlb_uv.c
index 503c1f2..af21e55 100644
--- a/arch/x86/kernel/tlb_uv.c
+++ b/arch/x86/kernel/tlb_uv.c
@@ -819,10 +819,8 @@ static int __init uv_init_blade(int blade)
*/
apicid = blade_to_first_apicid(blade);
pa = uv_read_global_mmr64(pnode, UVH_BAU_DATA_CONFIG);
- if ((pa & 0xff) != UV_BAU_MESSAGE) {
- uv_write_global_mmr64(pnode, UVH_BAU_DATA_CONFIG,
+ uv_write_global_mmr64(pnode, UVH_BAU_DATA_CONFIG,
((apicid << 32) | UV_BAU_MESSAGE));
- }
return 0;
}
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