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From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
To: davem@davemloft.net
Cc: Jacob Keller <jacob.e.keller@intel.com>,
	netdev@vger.kernel.org, nhorman@redhat.com, sassmann@redhat.com,
	jogreene@redhat.com, Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Subject: [net-next 09/13] fm10k: simplify reading PFVFLRE register
Date: Mon,  2 Oct 2017 08:42:32 -0700	[thread overview]
Message-ID: <20171002154236.84043-10-jeffrey.t.kirsher@intel.com> (raw)
In-Reply-To: <20171002154236.84043-1-jeffrey.t.kirsher@intel.com>

From: Jacob Keller <jacob.e.keller@intel.com>

We're doing a really convoluted bitshift and read for the PFVFLRE
register. Just reading the PFVFLRE(1), shifting it by 32, then reading
PFVFLRE(0) should be sufficient.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Krishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---
 drivers/net/ethernet/intel/fm10k/fm10k_iov.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_iov.c b/drivers/net/ethernet/intel/fm10k/fm10k_iov.c
index d8356c494f06..dfc88a463735 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_iov.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_iov.c
@@ -1,5 +1,5 @@
 /* Intel(R) Ethernet Switch Host Interface Driver
- * Copyright(c) 2013 - 2016 Intel Corporation.
+ * Copyright(c) 2013 - 2017 Intel Corporation.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
@@ -67,10 +67,8 @@ s32 fm10k_iov_event(struct fm10k_intfc *interface)
 
 	/* read VFLRE to determine if any VFs have been reset */
 	do {
-		vflre = fm10k_read_reg(hw, FM10K_PFVFLRE(0));
+		vflre = fm10k_read_reg(hw, FM10K_PFVFLRE(1));
 		vflre <<= 32;
-		vflre |= fm10k_read_reg(hw, FM10K_PFVFLRE(1));
-		vflre = (vflre << 32) | (vflre >> 32);
 		vflre |= fm10k_read_reg(hw, FM10K_PFVFLRE(0));
 
 		i = iov_data->num_vfs;
-- 
2.14.2

  parent reply	other threads:[~2017-10-02 15:42 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-10-02 15:42 [net-next 00/13][pull request] 100GbE Intel Wired LAN Driver Updates 2017-10-02 Jeff Kirsher
2017-10-02 15:42 ` [net-next 01/13] fm10k: ensure we process SM mbx when processing VF mbx Jeff Kirsher
2017-10-02 15:42 ` [net-next 02/13] fm10k: reschedule service event if we stall the PF<->SM mailbox Jeff Kirsher
2017-10-02 15:42 ` [net-next 03/13] fm10k: Use seq_putc() in fm10k_dbg_desc_break() Jeff Kirsher
2017-10-02 15:42 ` [net-next 04/13] fm10k: stop spurious link down messages when Tx FIFO is full Jeff Kirsher
2017-10-02 15:42 ` [net-next 05/13] fm10k: fix typos on fall through comments Jeff Kirsher
2017-10-02 15:42 ` [net-next 06/13] fm10k: avoid possible truncation of q_vector->name Jeff Kirsher
2017-10-02 15:42 ` [net-next 07/13] fm10k: add missing fall through comment Jeff Kirsher
2017-10-02 15:42 ` [net-next 08/13] fm10k: avoid needless delay when loading driver Jeff Kirsher
2017-10-02 15:42 ` Jeff Kirsher [this message]
2017-10-02 15:42 ` [net-next 10/13] fm10k: don't loop while resetting VFs due to VFLR event Jeff Kirsher
2017-10-02 15:42 ` [net-next 11/13] fm10k: avoid divide by zero in rare cases when device is resetting Jeff Kirsher
2017-10-02 15:42 ` [net-next 12/13] fm10k: move fm10k_prepare_for_reset and fm10k_handle_reset Jeff Kirsher
2017-10-02 15:42 ` [net-next 13/13] fm10k: prevent race condition of __FM10K_SERVICE_SCHED Jeff Kirsher
2017-10-02 18:59 ` [net-next 00/13][pull request] 100GbE Intel Wired LAN Driver Updates 2017-10-02 David Miller

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