cc'ing Alexander. Alexander, can you please reply with Reviewed-by?
Thanks.
On Mon, Feb 03, 2014 at 03:39:27PM -0500, Michael Marley wrote:
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> Hash: SHA1
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> From: Michael Marley <michael@xxxxxxxxxxxxxxxxx>
>
> Commit 7b92b4f61ec49cb1a5813298f35258bd7ecd3667 ("PCI/MSI: Remove
> pci_enable_msi_block_auto()") causes the AHCI driver to immediately
> switch to INTx mode if the pci_enable_msi_block() call fails to
> allocate the requested number of MSIs. This behavior causes some
> systems (for example, the Lenovo ThinkCentre m57p) to begin using
> INTx when they worked fine in single MSI mode before. This patch
> makes the driver try to enable a single MSI if the
> pci_enable_msi_block() call fails instead of switching directly
> to INTx.
>
> Signed-off-by: Michael Marley <michael@xxxxxxxxxxxxxxxxx>
>
> - ---
>
> - --- drivers/ata/ahci.c.orig 2014-02-03 20:00:04.834008843 +0000
> +++ drivers/ata/ahci.c 2014-02-03 19:34:53.737257483 +0000
> @@ -1171,7 +1171,7 @@ static int ahci_init_interrupts(struct p
> nvec = rc;
> rc = pci_enable_msi_block(pdev, nvec);
> if (rc)
> - - goto intx;
> + goto single_msi;
>
> return nvec;
>
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--
tejun
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