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Commit f723fa4e authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Tejun Heo
Browse files

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: default avatarJohn Loy <john.robert.loy@gmail.com>
Tested-by: default avatarJohn Loy <john.robert.loy@gmail.com>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Fixes: d684a90d ("ahci: per-port msix support")
Cc: stable@vger.kernel.org # v4.5+
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 687abc0f

drivers/ata/ahci.c

+8 −1
Original line number Original line Diff line number Diff line
@@ -1469,7 +1469,14 @@ static void ahci_remap_check(struct pci_dev *pdev, int bar, 
		return;

		return;





	dev_warn(&pdev->dev, "Found %d remapped NVMe devices.\n", count);

	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)

static int ahci_get_irq_vector(struct ata_host *host, int port)