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ahci: don't use MSI for devices with the silly Intel NVMe remapping scheme 

Intel AHCI controllers that also hide NVMe devices in their bar
can't use MSI interrupts, so disable them.

Reported-by: John Loy <john.robert.loy@gmail.com>
Tested-by: John Loy <john.robert.loy@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Fixes: d684a90d38 ("ahci: per-port msix support")
Cc: stable@vger.kernel.org # v4.5+
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Christoph Hellwig 2017-09-05 18:46:47 +02:00 committed by Tejun Heo
parent 687abc0f77
commit f723fa4e69
1 changed files with 8 additions and 1 deletions
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9
drivers/ata/ahci.c
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@ -1469,7 +1469,14 @@ static void ahci_remap_check(struct pci_dev *pdev, int bar,
return;
dev_warn(&pdev->dev, "Found %d remapped NVMe devices.\n", count);
dev_warn(&pdev->dev, "Switch your BIOS from RAID to AHCI mode to use them.\n");
dev_warn(&pdev->dev,
"Switch your BIOS from RAID to AHCI mode to use them.\n");
/*
* Don't rely on the msi-x capability in the remap case,
* share the legacy interrupt across ahci and remapped devices.
*/
hpriv->flags |= AHCI_HFLAG_NO_MSI;
}
static int ahci_get_irq_vector(struct ata_host *host, int port)