Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754240AbaBDLQI (ORCPT ); Tue, 4 Feb 2014 06:16:08 -0500 Received: from mx1.redhat.com ([209.132.183.28]:37190 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753616AbaBDLPe (ORCPT ); Tue, 4 Feb 2014 06:15:34 -0500 From: Alexander Gordeev To: linux-kernel@vger.kernel.org Cc: Alexander Gordeev , Anil Gurumurthy , Vijaya Mohan Guvva , linux-scsi@vger.kernel.org, linux-pci@vger.kernel.org Subject: [PATCH 02/22] bfa: Do not call pci_enable_msix() once it failed Date: Tue, 4 Feb 2014 12:16:48 +0100 Message-Id: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Function pci_enable_msix() should not be called again in case it threw a negative errno. Signed-off-by: Alexander Gordeev Cc: Anil Gurumurthy Cc: Vijaya Mohan Guvva Cc: linux-scsi@vger.kernel.org Cc: linux-pci@vger.kernel.org --- drivers/scsi/bfa/bfad.c | 48 ++++++++++++++++++++++------------------------ 1 files changed, 23 insertions(+), 25 deletions(-) diff --git a/drivers/scsi/bfa/bfad.c b/drivers/scsi/bfa/bfad.c index 85ee9c0..9b3e407 100644 --- a/drivers/scsi/bfa/bfad.c +++ b/drivers/scsi/bfa/bfad.c @@ -1235,33 +1235,31 @@ bfad_setup_intr(struct bfad_s *bfad) (bfa_asic_id_cb(pdev->device) && !msix_disable_cb)) { error = pci_enable_msix(bfad->pcidev, msix_entries, bfad->nvec); - if (error) { - /* In CT1 & CT2, try to allocate just one vector */ - if (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, + /* In CT1 & CT2, try to allocate just one vector */ + if (error > 0 && 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); - } + } - /* - * 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), " - "use line based.\n", - bfad->inst_no, error); - goto line_based; - } + /* + * 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), " + "use line based.\n", + bfad->inst_no, error); + goto line_based; } /* Disable INTX in MSI-X mode */ -- 1.7.7.6 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/