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authorEric W. Biederman <ebiederm@xmission.com>2006-10-04 05:16:35 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-04 10:55:27 -0400
commit92db6d10bc1bc43330a4c540fa5b64c83d9d865f (patch)
treed889ea4ba6d2e55a33d89f05d2b2222bed7788e7 /arch/ia64
parent38bc0361303535c86f6b67b151a541728d7bdae6 (diff)
[PATCH] genirq: msi: simplify the msi irq limit policy
Currently we attempt to predict how many irqs we will be able to allocate with msi using pci_vector_resources and some complicated accounting, and then we only allow each device as many irqs as we think are available on average. Only the s2io driver even takes advantage of this feature all other drivers have a fixed number of irqs they need and bail if they can't get them. pci_vector_resources is inaccurate if anyone ever frees an irq. The whole implmentation is racy. The current irq limit policy does not appear to make sense with current drivers. So I have simplified things. We can revisit this we we need a more sophisticated policy. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Rajesh Shah <rajesh.shah@intel.com> Cc: Andi Kleen <ak@muc.de> Cc: "Protasevich, Natalie" <Natalie.Protasevich@UNISYS.com> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/ia64')
-rw-r--r--arch/ia64/pci/pci.c9
1 files changed, 0 insertions, 9 deletions
diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
index 15c7c670da39..b30be7c48ba8 100644
--- a/arch/ia64/pci/pci.c
+++ b/arch/ia64/pci/pci.c
@@ -810,12 +810,3 @@ pcibios_prep_mwi (struct pci_dev *dev)
810 } 810 }
811 return rc; 811 return rc;
812} 812}
813
814int pci_vector_resources(int last, int nr_released)
815{
816 int count = nr_released;
817
818 count += (IA64_LAST_DEVICE_VECTOR - last);
819
820 return count;
821}