linux-kernel - RE: [PATCH v2 RESEND 04/23] bfa: Use pci_enable_msix_exact() instead of pci_enable

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Message-ID: <20B1A3CBD98F3845B3F5F56D8597EF59F827FE@avmb2.qlogic.org>
Date:	Wed, 16 Apr 2014 09:05:10 +0000
From:	Anil Gurumurthy <Anil.Gurumurthy@...gic.com>
To:	Alexander Gordeev <agordeev@...hat.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
CC:	linux-scsi <linux-scsi@...r.kernel.org>,
	linux-pci <linux-pci@...r.kernel.org>
Subject: RE: [PATCH v2 RESEND 04/23] bfa: Use pci_enable_msix_exact()
 instead of pci_enable_msix()

Patch look good.
Acked-by: Anil Gurumurthy <anil.gurumurthy@...gic.com>

-----Original Message-----
From: linux-scsi-owner@...r.kernel.org [mailto:linux-scsi-owner@...r.kernel.org] On Behalf Of Alexander Gordeev
Sent: 14 April 2014 13:35
To: linux-kernel
Cc: Alexander Gordeev; Anil Gurumurthy; Vijaya Mohan Guvva; linux-scsi; linux-pci
Subject: [PATCH v2 RESEND 04/23] bfa: Use pci_enable_msix_exact() 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()  or pci_enable_msi_exact() and pci_enable_msix_range() or pci_enable_msix_exact() 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 e7e4774..839c81c 100644
--- a/drivers/scsi/bfa/bfad.c
+++ b/drivers/scsi/bfa/bfad.c
@@ -1234,29 +1234,21 @@ 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_exact(bfad->pcidev,
+                                             msix_entries, 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_exact(bfad->pcidev,
+                                                     msix_entries, 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) {
                        printk(KERN_WARNING "bfad%d: "
-                              "pci_enable_msix failed (%d), "
+                              "pci_enable_msix_exact failed (%d), "
                               "use line based.\n",
                                bfad->inst_no, error);
                        goto line_based;
--
1.7.7.6

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