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Date: Fri, 17 Feb 2017 11:07:49 -0600 From: Andrew Banman <abanman@....com> To: mingo@...hat.com Cc: akpm@...ux-foundation.org, tglx@...utronix.de, hpa@...or.com, mike.travis@....com, rja@....com, sivanich@....com, x86@...nel.org, linux-kernel@...r.kernel.org, abanman@....com Subject: [PATCH] x86/platform/uv/BAU: Remove initial write to swack register Writing to the software acknowledge clear register when there are no pending messages causes a HUB error to assert. The original intent of this write was to clear the pending bits before start of operation, but this is an incorrect method and has been determined to be unnecessary. Signed-off-by: Andrew Banman <abanman@....com> Acked-by: Mike Travis <mike.travis@....com> --- arch/x86/platform/uv/tlb_uv.c | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/x86/platform/uv/tlb_uv.c b/arch/x86/platform/uv/tlb_uv.c index 766d4d3..f25982c 100644 --- a/arch/x86/platform/uv/tlb_uv.c +++ b/arch/x86/platform/uv/tlb_uv.c @@ -1847,7 +1847,6 @@ static void pq_init(int node, int pnode) ops.write_payload_first(pnode, first); ops.write_payload_last(pnode, last); - ops.write_g_sw_ack(pnode, 0xffffUL); /* in effect, all msg_type's are set to MSG_NOOP */ memset(pqp, 0, sizeof(struct bau_pq_entry) * DEST_Q_SIZE); -- 1.8.2.1
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