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[SCSI] lpfc 8.1.11 : Add MSI (Message Signalled Interrupts) support

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Add MSI (Message Signalled Interrupts) support
  Actual use must be enabled via the new module parameter "lpfc_use_msi"
  Defaults to no use

Many thanks to Frederic Temporelli who implemented the initial patch.

Signed-off-by: Frederic Temporelli <frederic.temporelli@ext.bull.net>
Signed-off-by: James Smart <James.Smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
James Smart
2006-12-02 13:34:56 -05:00
committed by James Bottomley
parent c7743956f8
commit 4ff43246e4
3 changed files with 22 additions and 0 deletions
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10
drivers/scsi/lpfc/lpfc_init.c
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@@ -1653,6 +1653,14 @@ lpfc_pci_probe_one(struct pci_dev *pdev, const struct pci_device_id *pid)
if (error)
goto out_remove_host;
if (phba->cfg_use_msi) {
error = pci_enable_msi(phba->pcidev);
if (error)
lpfc_printf_log(phba, KERN_INFO, LOG_INIT, "%d:0452 "
"Enable MSI failed, continuing with "
"IRQ\n", phba->brd_no);
}
error = request_irq(phba->pcidev->irq, lpfc_intr_handler, IRQF_SHARED,
LPFC_DRIVER_NAME, phba);
if (error) {
@@ -1732,6 +1740,7 @@ out_free_irq:
lpfc_stop_timer(phba);
phba->work_hba_events = 0;
free_irq(phba->pcidev->irq, phba);
pci_disable_msi(phba->pcidev);
out_free_sysfs_attr:
lpfc_free_sysfs_attr(phba);
out_remove_host:
@@ -1798,6 +1807,7 @@ lpfc_pci_remove_one(struct pci_dev *pdev)
/* Release the irq reservation */
free_irq(phba->pcidev->irq, phba);
pci_disable_msi(phba->pcidev);
lpfc_cleanup(phba, 0);
lpfc_stop_timer(phba);