Re: [PATCH 2/2] ACPI: PCI Interrupt Links -- disable when unused

[Len Brown <lenb@kernel.org>]

From: Len Brown <len.brown@intel.com>
Organization: Intel Open Source Technology Center

We start the system off with disabled links.
Here we enable the reference counting
on the links so that when drivers free IRQs
the links can return to the disabled state.

Drivers free their IRQ and reference on a link
when they unload.  They may also do so upon
suspend.  However, if they don't, irqrouter_resume()
will still resume any links that were
not disabled before suspend.

Signed-off-by: Len Brown <len.brown@intel.com>
---
Hmmm, look like I confused git-rebase on that one,
here it is again...

thanks,
-Len
---
 drivers/acpi/pci_link.c |   11 -----------
 1 files changed, 0 insertions(+), 11 deletions(-)

diff --git a/drivers/acpi/pci_link.c b/drivers/acpi/pci_link.c
index 595b131..0f7722d 100644
--- a/drivers/acpi/pci_link.c
+++ b/drivers/acpi/pci_link.c
@@ -693,18 +693,7 @@ int acpi_pci_link_free_irq(acpi_handle handle)
 		printk(KERN_ERR PREFIX "Link isn't initialized\n");
 		return -1;
 	}
-#ifdef	FUTURE_USE
-	/*
-	 * The Link reference count allows us to _DISable an unused link
-	 * and suspend time, and set it again  on resume.
-	 * However, 2.6.12 still has irq_router.resume
-	 * which blindly restores the link state.
-	 * So we disable the reference count method
-	 * to prevent duplicate acpi_pci_link_set()
-	 * which would harm some systems
-	 */
 	link->refcnt--;
-#endif
 	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
 			  "Link %s is dereferenced %d\n",
 			  acpi_device_bid(link->device), link->refcnt));
-- 
1.6.1.rc3.35.gc0ceb