[PATCH] x86: sgi uv BAU initialization

[Cliff Wickman]

From: Cliff Wickman <cpw@xxxxxxx>

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.

Diffed against 2.6.32-rc7

Signed-off-by: Cliff Wickman <cpw@xxxxxxx>
---
 arch/x86/kernel/tlb_uv.c |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

Index: 091119.linux/arch/x86/kernel/tlb_uv.c
===================================================================
--- 091119.linux.orig/arch/x86/kernel/tlb_uv.c
+++ 091119.linux/arch/x86/kernel/tlb_uv.c
@@ -817,10 +817,8 @@ static int __init uv_init_blade(int blad
 	 */
 	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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