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authorChristoph Hellwig <hch@lst.de>2017-09-05 18:46:47 +0200
committerTejun Heo <tj@kernel.org>2017-09-06 07:36:23 -0700
commitf723fa4e69920f6a5dd5fa0d10ce90e2f14d189c (patch)
tree75754abc829902a310de4fe71d7f6ebf935b555f /drivers/ata/ahci.c
parent687abc0f77c239dc4cc93ea5cd27cfad76ddd038 (diff)
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: d684a90d38e2 ("ahci: per-port msix support") Cc: stable@vger.kernel.org # v4.5+ Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers/ata/ahci.c')
-rw-r--r--drivers/ata/ahci.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 5a5fd0b404eb..cb9b0e9090e3 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -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)