netdev - [PATCH 3/6] netdev: octeon_mgmt: Fix race manipulating irq bits.

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Date:	Wed,  5 May 2010 16:03:10 -0700
From:	David Daney <ddaney@...iumnetworks.com>
To:	netdev@...r.kernel.org
Cc:	linux-mips@...ux-mips.org, David Daney <ddaney@...iumnetworks.com>
Subject: [PATCH 3/6] netdev: octeon_mgmt: Fix race manipulating irq bits.

Don't re-read the interrupt status register, clear the exact bits we
will be testing.

Signed-off-by: David Daney <ddaney@...iumnetworks.com>
---
 drivers/net/octeon/octeon_mgmt.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/drivers/net/octeon/octeon_mgmt.c b/drivers/net/octeon/octeon_mgmt.c
index b975a2f..633fa89 100644
--- a/drivers/net/octeon/octeon_mgmt.c
+++ b/drivers/net/octeon/octeon_mgmt.c
@@ -598,8 +598,7 @@ static irqreturn_t octeon_mgmt_interrupt(int cpl, void *dev_id)
 	mixx_isr.u64 = cvmx_read_csr(CVMX_MIXX_ISR(port));
 
 	/* Clear any pending interrupts */
-	cvmx_write_csr(CVMX_MIXX_ISR(port),
-		       cvmx_read_csr(CVMX_MIXX_ISR(port)));
+	cvmx_write_csr(CVMX_MIXX_ISR(port), mixx_isr.u64);
 	cvmx_read_csr(CVMX_MIXX_ISR(port));
 
 	if (mixx_isr.s.irthresh) {
-- 
1.6.6.1

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