linux-kernel - MSI changes in .28

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Message-Id: <200812050953.12238.elendil@planet.nl>
Date:	Fri, 5 Dec 2008 09:53:10 +0100
From:	Frans Pop <elendil@...net.nl>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	rjw@...k.pl, greg@...ah.com, mingo@...e.hu,
	jbarnes@...tuousgeek.org, lenb@...nel.org,
	linux-kernel@...r.kernel.org, tiwai@...e.de,
	akpm@...ux-foundation.org, ink@...assic.park.msu.ru
Subject: MSI changes in .28

On Tuesday 02 December 2008, Linus Torvalds wrote:
> So, it looks like you have MSI enabled in -rc6, and not in -rc3.

I've just compared dmesg for my *desktop* and there I see the following
between 2.6.28-rc6 and current 2.6.28-rc7:

 pcieport-driver 0000:00:1c.0: setting latency timer to 64
 pcieport-driver 0000:00:1c.0: found MSI capability
-pcieport-driver 0000:00:1c.0: irq 47 for MSI/MSI-X
+pcieport-driver 0000:00:1c.0: irq 511 for MSI/MSI-X
 pci_express 0000:00:1c.0:pcie00: allocate port service
 pci_express 0000:00:1c.0:pcie02: allocate port service
 pcieport-driver 0000:00:1c.2: setting latency timer to 64
 pcieport-driver 0000:00:1c.2: found MSI capability
-pcieport-driver 0000:00:1c.2: irq 46 for MSI/MSI-X
+pcieport-driver 0000:00:1c.2: irq 510 for MSI/MSI-X
 pci_express 0000:00:1c.2:pcie00: allocate port service
 pci_express 0000:00:1c.2:pcie02: allocate port service
 pcieport-driver 0000:00:1c.3: setting latency timer to 64
 pcieport-driver 0000:00:1c.3: found MSI capability
-pcieport-driver 0000:00:1c.3: irq 45 for MSI/MSI-X
+pcieport-driver 0000:00:1c.3: irq 509 for MSI/MSI-X
 pci_express 0000:00:1c.3:pcie00: allocate port service
 pci_express 0000:00:1c.3:pcie02: allocate port service
 pcieport-driver 0000:00:1c.4: setting latency timer to 64
 pcieport-driver 0000:00:1c.4: found MSI capability
-pcieport-driver 0000:00:1c.4: irq 44 for MSI/MSI-X
+pcieport-driver 0000:00:1c.4: irq 508 for MSI/MSI-X
 pci_express 0000:00:1c.4:pcie00: allocate port service
 pci_express 0000:00:1c.4:pcie02: allocate port service
 pcieport-driver 0000:00:1c.5: setting latency timer to 64
 pcieport-driver 0000:00:1c.5: found MSI capability
-pcieport-driver 0000:00:1c.5: irq 43 for MSI/MSI-X
+pcieport-driver 0000:00:1c.5: irq 507 for MSI/MSI-X
[...]
 ahci 0000:00:1f.2: PCI INT B -> GSI 19 (level, low) -> IRQ 19
-ahci 0000:00:1f.2: irq 42 for MSI/MSI-X
+ahci 0000:00:1f.2: irq 506 for MSI/MSI-X
 ahci 0000:00:1f.2: AHCI 0001.0100 32 slots 4 ports 3 Gbps 0xf impl SATA mode
[...]
 e1000e 0000:01:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
 e1000e 0000:01:00.0: setting latency timer to 64
-e1000e 0000:01:00.0: irq 41 for MSI/MSI-X
+e1000e 0000:01:00.0: irq 505 for MSI/MSI-X

I.e. very similar to the change between rc-3 and rc-7 you commented on
for my notebook.

Is this really MSI being (not) enabled, or just it using much higher
IRQ numbers?
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