leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

x86: SGI UV: Fix BAU initialization

Browse Source 
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>
This commit is contained in:
Cliff Wickman 2009-11-19 17:12:43 -06:00 committed by Ingo Molnar
parent d9c2d5ac6a
commit e38e2af1c5
1 changed files with 1 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/x86/kernel/tlb_uv.c
View File

@ -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;
}