netdev - [net-next 01/14] i40e: do not take NVM ownership for SR read

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Message-Id: <1403784834-23301-2-git-send-email-jeffrey.t.kirsher@intel.com>
Date:	Thu, 26 Jun 2014 05:13:40 -0700
From:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:	davem@...emloft.net
Cc:	Kamil Krawczyk <kamil.krawczyk@...el.com>, netdev@...r.kernel.org,
	gospo@...hat.com, sassmann@...hat.com,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 01/14] i40e: do not take NVM ownership for SR read

From: Kamil Krawczyk <kamil.krawczyk@...el.com>

We do not need to acquire NVM for Shadow RAM XSUM calculation, as we only
read from SR through SRCTL register for which having the ownership is not
required.

Change-ID: Ie238a8f09917d1d25f24cc7cec271951ac7b98f2
Signed-off-by: Kamil Krawczyk <kamil.krawczyk@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
 drivers/net/ethernet/intel/i40e/i40e_nvm.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_nvm.c b/drivers/net/ethernet/intel/i40e/i40e_nvm.c
index 8129918..66bcb15 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_nvm.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_nvm.c
@@ -324,13 +324,9 @@ i40e_status i40e_validate_nvm_checksum(struct i40e_hw *hw,
 	u16 checksum_sr = 0;
 	u16 checksum_local = 0;
 
-	ret_code = i40e_acquire_nvm(hw, I40E_RESOURCE_READ);
-	if (ret_code)
-		goto i40e_validate_nvm_checksum_exit;
-
 	ret_code = i40e_calc_nvm_checksum(hw, &checksum_local);
 	if (ret_code)
-		goto i40e_validate_nvm_checksum_free;
+		goto i40e_validate_nvm_checksum_exit;
 
 	/* Do not use i40e_read_nvm_word() because we do not want to take
 	 * the synchronization semaphores twice here.
@@ -347,9 +343,6 @@ i40e_status i40e_validate_nvm_checksum(struct i40e_hw *hw,
 	if (checksum)
 		*checksum = checksum_local;
 
-i40e_validate_nvm_checksum_free:
-	i40e_release_nvm(hw);
-
 i40e_validate_nvm_checksum_exit:
 	return ret_code;
 }
-- 
1.9.3

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