linux-kernel - [PATCH RFC v2 29/29] vmxnet3: Make use of pcim_enable_msix

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Date:	Fri, 18 Oct 2013 19:12:29 +0200
From:	Alexander Gordeev <agordeev@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	Alexander Gordeev <agordeev@...hat.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Michael Ellerman <michael@...erman.id.au>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Tejun Heo <tj@...nel.org>,
	Ben Hutchings <bhutchings@...arflare.com>,
	David Laight <David.Laight@...LAB.COM>,
	Mark Lord <kernel@...rt.ca>, "H. Peter Anvin" <hpa@...or.com>,
	linux-pci@...r.kernel.org
Subject: [PATCH RFC v2 29/29] vmxnet3: Make use of pcim_enable_msix_range() interface

Signed-off-by: Alexander Gordeev <agordeev@...hat.com>
---
 drivers/net/vmxnet3/vmxnet3_drv.c |   40 +++++++++---------------------------
 1 files changed, 10 insertions(+), 30 deletions(-)

diff --git a/drivers/net/vmxnet3/vmxnet3_drv.c b/drivers/net/vmxnet3/vmxnet3_drv.c
index d33802c..e552d2b 100644
--- a/drivers/net/vmxnet3/vmxnet3_drv.c
+++ b/drivers/net/vmxnet3/vmxnet3_drv.c
@@ -2735,39 +2735,19 @@ vmxnet3_read_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac)
  */
 
 static int
-vmxnet3_acquire_msix_vectors(struct vmxnet3_adapter *adapter,
-			     int vectors)
+vmxnet3_acquire_msix_vectors(struct vmxnet3_adapter *adapter, int vectors)
 {
-	int err = -EINVAL, vector_threshold;
-	vector_threshold = VMXNET3_LINUX_MIN_MSIX_VECT;
-
-	while (vectors >= vector_threshold) {
-		err = pci_enable_msix(adapter->pdev, adapter->intr.msix_entries,
-				      vectors);
-		if (!err) {
-			adapter->intr.num_intrs = vectors;
-			return 0;
-		} else if (err < 0) {
-			dev_err(&adapter->netdev->dev,
-				   "Failed to enable MSI-X, error: %d\n", err);
-			return err;
-		} else if (err < vector_threshold) {
-			dev_info(&adapter->pdev->dev,
-				 "Number of MSI-Xs which can be allocated "
-				 "is lower than min threshold required.\n");
-			return -ENOSPC;
-		} else {
-			/* If fails to enable required number of MSI-x vectors
-			 * try enabling minimum number of vectors required.
-			 */
-			dev_err(&adapter->netdev->dev,
-				"Failed to enable %d MSI-X, trying %d instead\n",
-				    vectors, vector_threshold);
-			vectors = vector_threshold;
-		}
+	vectors = pcim_enable_msix_range(adapter->pdev,
+					 adapter->intr.msix_entries, vectors,
+					 VMXNET3_LINUX_MIN_MSIX_VECT);
+	if (vectors < 0) {
+		dev_err(&adapter->netdev->dev,
+			"Failed to enable MSI-X, error: %d\n", vectors);
+		return vectors;
 	}
 
-	return err;
+	adapter->intr.num_intrs = vectors;
+	return 0;
 }
 
 
-- 
1.7.7.6

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