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: x...@kernel.org
Cc: xen-de...@lists.xenproject.org
Cc: io...@lists.linux-foundation.org
Cc: linux-...@vger.kernel.org
Cc: linux-...@vger.kernel.org
Signed-off-by: Alexander Gordeev <agord...@redhat.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
--
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