Patchwork [RFC,37/77] ipr: Update MSI/MSI-X interrupts enablement code

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Submitter Alexander Gordeev
Date Oct. 2, 2013, 10:48 a.m.
Message ID <5bc4414bf44d7ded72c38333225b9057b3427869.1380703263.git.agordeev@redhat.com>
Download mbox | patch
Permalink /patch/279933/
State RFC
Headers show

Comments

Alexander Gordeev - Oct. 2, 2013, 10:48 a.m.
As result of recent re-design of the MSI/MSI-X interrupts enabling
pattern this driver has to be updated to use the new technique to
obtain a optimal number of MSI/MSI-X interrupts required.

Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
---
 drivers/scsi/ipr.c |   46 +++++++++++++++++++++++-----------------------
 1 files changed, 23 insertions(+), 23 deletions(-)

Patch

diff --git a/drivers/scsi/ipr.c b/drivers/scsi/ipr.c
index 762a93e..86ed0a2 100644
--- a/drivers/scsi/ipr.c
+++ b/drivers/scsi/ipr.c
@@ -9247,45 +9247,45 @@  static int ipr_enable_msix(struct ipr_ioa_cfg *ioa_cfg)
 	struct msix_entry entries[IPR_MAX_MSIX_VECTORS];
 	int i, err, vectors;
 
-	for (i = 0; i < ARRAY_SIZE(entries); ++i)
-		entries[i].entry = i;
+	err = pci_msix_table_size(ioa_cfg->pdev);
+	if (err < 0)
+		return err;
 
-	vectors = ipr_number_of_msix;
+	vectors = min_t(int, err, ipr_number_of_msix);
 
-	while ((err = pci_enable_msix(ioa_cfg->pdev, entries, vectors)) > 0)
-			vectors = err;
+	BUG_ON(vectors > ARRAY_SIZE(entries));
+	for (i = 0; i < vectors; ++i)
+		entries[i].entry = i;
 
-	if (err < 0)
+	err = pci_enable_msix(ioa_cfg->pdev, entries, vectors);
+	if (err)
 		return err;
 
-	if (!err) {
-		for (i = 0; i < vectors; i++)
-			ioa_cfg->vectors_info[i].vec = entries[i].vector;
-		ioa_cfg->nvectors = vectors;
-	}
+	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;
 
-	vectors = ipr_number_of_msix;
-
-	while ((err = pci_enable_msi_block(ioa_cfg->pdev, vectors)) > 0)
-			vectors = err;
-
+	err = pci_get_msi_cap(ioa_cfg->pdev);
 	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;
-	}
+	vectors = min_t(int, err, ipr_number_of_msix);
+	err = pci_enable_msi_block(ioa_cfg->pdev, vectors);
+	if (err)
+		return 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)