ahci: restore pci_intx() handling

Commit a5bfc4714b3f01365aef89a92673f2ceb1ccf246 dropped explicit
pci_intx() manipulation from ahci because it seemed unnecessary and
ahci doesn't seem to be the right place to be tweaking it if it were.
This was largely okay but there are exceptions.  There was one on an
embedded platform which was fixed via firmware and now bko#14124
reports it on a HP DL320.

  http://bugzilla.kernel.org/show_bug.cgi?id=14124

I still think this isn't something libata drivers should be caring
about (the only ones which are calling pci_intx() explicitly are
libata ones and one other driver) but for now reverting the change
seems to be the right thing to do.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Thomas Jarosch <thomas.jarosch@intra2net.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index d4cd9c203314df43b960cbbef0e05211d535b8da..acd1162712b18920ff4a0c2a00d6b7e44c4fc3bd 100644 (file)
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -2930,8 +2930,8 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
        if (ahci_sb600_32bit_only(pdev))
                hpriv->flags |= AHCI_HFLAG_32BIT_ONLY;
 
-       if (!(hpriv->flags & AHCI_HFLAG_NO_MSI))
-               pci_enable_msi(pdev);
+       if ((hpriv->flags & AHCI_HFLAG_NO_MSI) || pci_enable_msi(pdev))
+               pci_intx(pdev, 1);
 
        /* save initial config */
        ahci_save_initial_config(pdev, hpriv);