linux-kernel - [PATCH net-next 13/35] i40e: Use pci_enable_msix_range() instead of pci_enable

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Message-Id: <3655fd750c2f1c00c2474900539a305d50fdeb6f.1392717503.git.agordeev@redhat.com>
Date:	Tue, 18 Feb 2014 11:11:42 +0100
From:	Alexander Gordeev <agordeev@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	Alexander Gordeev <agordeev@...hat.com>,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
	Jesse Brandeburg <jesse.brandeburg@...el.com>,
	e1000-devel@...ts.sourceforge.net, netdev@...r.kernel.org,
	linux-pci@...r.kernel.org
Subject: [PATCH net-next 13/35] i40e: Use pci_enable_msix_range() instead of pci_enable_msix()

As result of deprecation of MSI-X/MSI enablement functions
pci_enable_msix() and pci_enable_msi_block() all drivers
using these two interfaces need to be updated to use the
new pci_enable_msi_range() and pci_enable_msix_range()
interfaces.

Signed-off-by: Alexander Gordeev <agordeev@...hat.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Cc: Jesse Brandeburg <jesse.brandeburg@...el.com>
Cc: e1000-devel@...ts.sourceforge.net
Cc: netdev@...r.kernel.org
Cc: linux-pci@...r.kernel.org
---
 drivers/net/ethernet/intel/i40e/i40e_main.c |   33 +++++----------------------
 1 files changed, 6 insertions(+), 27 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 628e917..3116861 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -5856,37 +5856,16 @@ err_out:
  **/
 static int i40e_reserve_msix_vectors(struct i40e_pf *pf, int vectors)
 {
-	int err = 0;
-
-	pf->num_msix_entries = 0;
-	while (vectors >= I40E_MIN_MSIX) {
-		err = pci_enable_msix(pf->pdev, pf->msix_entries, vectors);
-		if (err == 0) {
-			/* good to go */
-			pf->num_msix_entries = vectors;
-			break;
-		} else if (err < 0) {
-			/* total failure */
-			dev_info(&pf->pdev->dev,
-				 "MSI-X vector reservation failed: %d\n", err);
-			vectors = 0;
-			break;
-		} else {
-			/* err > 0 is the hint for retry */
-			dev_info(&pf->pdev->dev,
-				 "MSI-X vectors wanted %d, retrying with %d\n",
-				 vectors, err);
-			vectors = err;
-		}
-	}
-
-	if (vectors > 0 && vectors < I40E_MIN_MSIX) {
+	vectors = pci_enable_msix_range(pf->pdev, pf->msix_entries,
+					I40E_MIN_MSIX, vectors);
+	if (vectors < 0) {
 		dev_info(&pf->pdev->dev,
-			 "Couldn't get enough vectors, only %d available\n",
-			 vectors);
+			 "MSI-X vector reservation failed: %d\n", vectors);
 		vectors = 0;
 	}
 
+	pf->num_msix_entries = vectors;
+
 	return vectors;
 }
 
-- 
1.7.7.6

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