From: Christoph Hellwig Date: Fri, 18 Nov 2016 13:09:06 +0000 (+0100) Subject: ahci: always fall back to single-MSI mode X-Git-Tag: v4.9~5^2~2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6929ef385e09c0065b87fda3e7b872a5070ac783;p=platform%2Fkernel%2Flinux-exynos.git ahci: always fall back to single-MSI mode Don't try to guess what the errors from pci_irq_alloc_vectors mean, as that's too fragile. Instead always try allocating a single vector when multi-MSI mode fails. This makes various intel Desktop and Laptop CPUs use MSI again. Signed-off-by: Christoph Hellwig Reported-by: Michael Marley Tested-by: Michael Marley Fixes: 0b9e2988ab22 ("ahci: use pci_alloc_irq_vectors") Signed-off-by: Tejun Heo --- diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index 9669fc7..74f4c66 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -1436,13 +1436,6 @@ static int ahci_init_msi(struct pci_dev *pdev, unsigned int n_ports, "ahci: MRSM is on, fallback to single MSI\n"); pci_free_irq_vectors(pdev); } - - /* - * -ENOSPC indicated we don't have enough vectors. Don't bother - * trying a single vectors for any other error: - */ - if (nvec < 0 && nvec != -ENOSPC) - return nvec; } /*