linux-kernel - [PATCH 04/22] bfa: Use pci_enable_msix

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Message-Id: <27badb9a4468decf94f38a625b9faa8a3498dc85.1391512266.git.agordeev@redhat.com>
Date:	Tue,  4 Feb 2014 12:16:50 +0100
From:	Alexander Gordeev <agordeev@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	Alexander Gordeev <agordeev@...hat.com>,
	Anil Gurumurthy <agurumur@...cade.com>,
	Vijaya Mohan Guvva <vmohan@...cade.com>,
	linux-scsi@...r.kernel.org, linux-pci@...r.kernel.org
Subject: [PATCH 04/22] bfa: Use pci_enable_msix_range()

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: Anil Gurumurthy <agurumur@...cade.com>
Cc: Vijaya Mohan Guvva <vmohan@...cade.com>
Cc: linux-scsi@...r.kernel.org
Cc: linux-pci@...r.kernel.org
---
 drivers/scsi/bfa/bfad.c |   20 ++++++--------------
 1 files changed, 6 insertions(+), 14 deletions(-)

diff --git a/drivers/scsi/bfa/bfad.c b/drivers/scsi/bfa/bfad.c
index cd318f1..ee7442e 100644
--- a/drivers/scsi/bfa/bfad.c
+++ b/drivers/scsi/bfa/bfad.c
@@ -1234,27 +1234,19 @@ bfad_setup_intr(struct bfad_s *bfad)
 	if ((bfa_asic_id_ctc(pdev->device) && !msix_disable_ct) ||
 	   (bfa_asic_id_cb(pdev->device) && !msix_disable_cb)) {
 
-		error = pci_enable_msix(bfad->pcidev, msix_entries, bfad->nvec);
+		error = pci_enable_msix_range(bfad->pcidev, msix_entries,
+					      bfad->nvec, bfad->nvec);
 		/* In CT1 & CT2, try to allocate just one vector */
-		if (error > 0 && bfa_asic_id_ctc(pdev->device)) {
+		if (error == -ENOSPC && bfa_asic_id_ctc(pdev->device)) {
 			printk(KERN_WARNING "bfa %s: trying one msix "
 			       "vector failed to allocate %d[%d]\n",
 			       bfad->pci_name, bfad->nvec, error);
 			bfad->nvec = 1;
-			error = pci_enable_msix(bfad->pcidev,
-						msix_entries, bfad->nvec);
+			error = pci_enable_msix_range(bfad->pcidev,
+						      msix_entries, 1, 1);
 		}
 
-		/*
-		 * Only error number of vector is available.
-		 * We don't have a mechanism to map multiple
-		 * interrupts into one vector, so even if we
-		 * can try to request less vectors, we don't
-		 * know how to associate interrupt events to
-		 *  vectors. Linux doesn't duplicate vectors
-		 * in the MSIX table for this case.
-		 */
-		if (error) {
+		if (error < 0) {
 			printk(KERN_WARNING "bfad%d: "
 			       "pci_enable_msix failed (%d), "
 			       "use line based.\n",
-- 
1.7.7.6

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