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authorYinghai Lu <yhlu.kernel.send@gmail.com>2008-04-23 17:58:09 -0400
committerJesse Barnes <jbarnes@hobbes.lan>2008-04-29 12:12:51 -0400
commitd52877c7b1afb8c37ebe17e2005040b79cb618b0 (patch)
treeb5cc4252cad0d7f22a6b63e50d1ec46a9a495773 /drivers/pci/msi.c
parent8e149e09f91098fd72bf9ac5b4a77a693abf721e (diff)
pci/irq: let pci_device_shutdown to call pci_msi_shutdown v2
[PATCH 2/2] pci/irq: let pci_device_shutdown to call pci_msi_shutdown v2 this change | commit 23a274c8a5adafc74a66f16988776fc7dd6f6e51 | Author: Prakash, Sathya <sathya.prakash@lsi.com> | Date: Fri Mar 7 15:53:21 2008 +0530 | | [SCSI] mpt fusion: Enable MSI by default for SAS controllers | | This patch modifies the driver to enable MSI by default for all SAS chips. | | Signed-off-by: Sathya Prakash <sathya.prakash@lsi.com> | Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> | Causes the kexec of a RHEL 5.1 kernel to fail. root casue: the rhel 5.1 kernel still uses INTx emulation. and mptscsih_shutdown doesn't call pci_disable_msi to reenable INTx on kexec path So call pci_msi_shutdown in the shutdown path to do the same thing to msix Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Jesse Barnes <jbarnes@hobbes.lan>
Diffstat (limited to 'drivers/pci/msi.c')
-rw-r--r--drivers/pci/msi.c35
1 files changed, 26 insertions, 9 deletions
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index e3a05cc9a595..8c61304cbb37 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -571,10 +571,9 @@ int pci_enable_msi(struct pci_dev* dev)
571} 571}
572EXPORT_SYMBOL(pci_enable_msi); 572EXPORT_SYMBOL(pci_enable_msi);
573 573
574void pci_disable_msi(struct pci_dev* dev) 574void pci_msi_shutdown(struct pci_dev* dev)
575{ 575{
576 struct msi_desc *entry; 576 struct msi_desc *entry;
577 int default_irq;
578 577
579 if (!pci_msi_enable || !dev || !dev->msi_enabled) 578 if (!pci_msi_enable || !dev || !dev->msi_enabled)
580 return; 579 return;
@@ -590,15 +589,26 @@ void pci_disable_msi(struct pci_dev* dev)
590 u32 mask = entry->msi_attrib.maskbits_mask; 589 u32 mask = entry->msi_attrib.maskbits_mask;
591 msi_set_mask_bits(dev->irq, mask, ~mask); 590 msi_set_mask_bits(dev->irq, mask, ~mask);
592 } 591 }
593 if (!entry->dev || entry->msi_attrib.type != PCI_CAP_ID_MSI) { 592 if (!entry->dev || entry->msi_attrib.type != PCI_CAP_ID_MSI)
594 return; 593 return;
595 }
596
597 default_irq = entry->msi_attrib.default_irq;
598 msi_free_irqs(dev);
599 594
600 /* Restore dev->irq to its default pin-assertion irq */ 595 /* Restore dev->irq to its default pin-assertion irq */
601 dev->irq = default_irq; 596 dev->irq = entry->msi_attrib.default_irq;
597}
598void pci_disable_msi(struct pci_dev* dev)
599{
600 struct msi_desc *entry;
601
602 if (!pci_msi_enable || !dev || !dev->msi_enabled)
603 return;
604
605 pci_msi_shutdown(dev);
606
607 entry = list_entry(dev->msi_list.next, struct msi_desc, list);
608 if (!entry->dev || entry->msi_attrib.type != PCI_CAP_ID_MSI)
609 return;
610
611 msi_free_irqs(dev);
602} 612}
603EXPORT_SYMBOL(pci_disable_msi); 613EXPORT_SYMBOL(pci_disable_msi);
604 614
@@ -691,7 +701,7 @@ static void msix_free_all_irqs(struct pci_dev *dev)
691 msi_free_irqs(dev); 701 msi_free_irqs(dev);
692} 702}
693 703
694void pci_disable_msix(struct pci_dev* dev) 704void pci_msix_shutdown(struct pci_dev* dev)
695{ 705{
696 if (!pci_msi_enable || !dev || !dev->msix_enabled) 706 if (!pci_msi_enable || !dev || !dev->msix_enabled)
697 return; 707 return;
@@ -699,6 +709,13 @@ void pci_disable_msix(struct pci_dev* dev)
699 msix_set_enable(dev, 0); 709 msix_set_enable(dev, 0);
700 pci_intx_for_msi(dev, 1); 710 pci_intx_for_msi(dev, 1);
701 dev->msix_enabled = 0; 711 dev->msix_enabled = 0;
712}
713void pci_disable_msix(struct pci_dev* dev)
714{
715 if (!pci_msi_enable || !dev || !dev->msix_enabled)
716 return;
717
718 pci_msix_shutdown(dev);
702 719
703 msix_free_all_irqs(dev); 720 msix_free_all_irqs(dev);
704} 721}