From: Andrew Banman <abanman@hpe.com>
To: mingo@redhat.com
Cc: akpm@linux-foundation.org, tglx@linutronix.de, hpa@zytor.com,
mike.travis@hpe.com, rja@hpe.com, sivanich@hpe.com,
x86@kernel.org, linux-kernel@vger.kernel.org, abanman@hpe.com
Subject: [PATCH] x86/platform/uv/BAU: Remove initial write to swack register
Date: Fri, 17 Feb 2017 11:07:49 -0600 [thread overview]
Message-ID: <1487351269-181133-1-git-send-email-abanman@hpe.com> (raw)
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@hpe.com>
Acked-by: Mike Travis <mike.travis@hpe.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
next reply other threads:[~2017-02-17 17:08 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-17 17:07 Andrew Banman [this message]
2017-03-01 9:48 ` [tip:x86/urgent] x86/platform/uv/BAU: Fix HUB errors by remove initial write to sw-ack register tip-bot for Andrew Banman
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