linux-kernel - [PATCH RFC v2 14/29] ipr: Make use of pcim_enable

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Date:	Fri, 18 Oct 2013 19:12:14 +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 14/29] ipr: Make use of pcim_enable_msi/msix() interfaces

Signed-off-by: Alexander Gordeev <agordeev@...hat.com>
---
 drivers/scsi/ipr.c |   47 ++++++++++++++++++-----------------------------
 1 files changed, 18 insertions(+), 29 deletions(-)

diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index fb57e21..d7c94d5 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -9245,47 +9245,36 @@ ipr_get_chip_info(const struct pci_device_id *dev_id)
 static int ipr_enable_msix(struct ipr_ioa_cfg *ioa_cfg)
 {
 	struct msix_entry entries[IPR_MAX_MSIX_VECTORS];
-	int i, err, vectors;
+	int i, vectors;
 
-	for (i = 0; i < ARRAY_SIZE(entries); ++i)
+	vectors = min_t(int, ARRAY_SIZE(entries), ipr_number_of_msix);
+	for (i = 0; i < vectors; ++i)
 		entries[i].entry = i;
 
-	vectors = ipr_number_of_msix;
+	vectors = pcim_enable_msix(ioa_cfg->pdev, entries, vectors);
+	if (vectors < 0)
+		return vectors;
 
-	while ((err = pci_enable_msix(ioa_cfg->pdev, entries, vectors)) > 0)
-			vectors = err;
+	for (i = 0; i < vectors; i++)
+		ioa_cfg->vectors_info[i].vec = entries[i].vector;
+	ioa_cfg->nvectors = vectors;
 
-	if (err < 0)
-		return err;
-
-	if (!err) {
-		for (i = 0; i < vectors; i++)
-			ioa_cfg->vectors_info[i].vec = entries[i].vector;
-		ioa_cfg->nvectors = vectors;
-	}
-
-	return err;
+	return 0;
 }
 
 static int ipr_enable_msi(struct ipr_ioa_cfg *ioa_cfg)
 {
-	int i, err, vectors;
+	int i, vectors;
 
-	vectors = ipr_number_of_msix;
+	vectors = pcim_enable_msi(ioa_cfg->pdev, ipr_number_of_msix);
+	if (vectors < 0)
+		return vectors;
 
-	while ((err = pci_enable_msi_block(ioa_cfg->pdev, vectors)) > 0)
-			vectors = err;
+	for (i = 0; i < vectors; i++)
+		ioa_cfg->vectors_info[i].vec = ioa_cfg->pdev->irq + i;
+	ioa_cfg->nvectors = vectors;
 
-	if (err < 0)
-		return err;
-
-	if (!err) {
-		for (i = 0; i < vectors; i++)
-			ioa_cfg->vectors_info[i].vec = ioa_cfg->pdev->irq + i;
-		ioa_cfg->nvectors = vectors;
-	}
-
-	return err;
+	return 0;
 }
 
 static void name_msi_vectors(struct ipr_ioa_cfg *ioa_cfg)
-- 
1.7.7.6

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