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Message-Id: <dba9f0f8e9cccd7625d0f3fab94457482e1a2bd7.1402405331.git.agordeev@redhat.com> Date: Tue, 10 Jun 2014 15:10:32 +0200 From: Alexander Gordeev <agordeev@...hat.com> To: linux-kernel@...r.kernel.org Cc: Alexander Gordeev <agordeev@...hat.com>, x86@...nel.org, xen-devel@...ts.xenproject.org, iommu@...ts.linux-foundation.org, linux-ide@...r.kernel.org, linux-pci@...r.kernel.org Subject: [PATCH 3/3] AHCI: Use pci_enable_msi_partial() to conserve on 10/16 MSIs Make use of the new pci_enable_msi_partial() interface and conserve on othewise wasted interrupt resources for 10 out of 16 unused MSI vectors on Intel chipsets. Cc: x86@...nel.org Cc: xen-devel@...ts.xenproject.org Cc: iommu@...ts.linux-foundation.org Cc: linux-ide@...r.kernel.org Cc: linux-pci@...r.kernel.org Signed-off-by: Alexander Gordeev <agordeev@...hat.com> --- drivers/ata/ahci.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index 6070781..0c7a0f3 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -1194,7 +1194,7 @@ static int ahci_init_interrupts(struct pci_dev *pdev, unsigned int n_ports, if (nvec < n_ports) goto single_msi; - rc = pci_enable_msi_exact(pdev, nvec); + rc = pci_enable_msi_partial(pdev, n_ports, nvec); if (rc == -ENOSPC) goto single_msi; else if (rc < 0) @@ -1207,7 +1207,7 @@ static int ahci_init_interrupts(struct pci_dev *pdev, unsigned int n_ports, goto single_msi; } - return nvec; + return n_ports; single_msi: if (pci_enable_msi(pdev)) -- 1.7.7.6 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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