From bb67dd1878de5766c24fe7a4002d1a12c14da518 Mon Sep 17 00:00:00 2001 From: Pierre-Louis Bossart Date: Tue, 6 Aug 2019 12:06:03 -0500 Subject: [PATCH] ASoC: SOF: Intel: hda: fix MSI handling The addition of a kernel module parameter to optionally disable MSI had the side effect of permanently disabling it. The return value of pci_alloc_irq_vectors() is the number of allocated vectors or a negative number on error, so testing with the ! operator is not quite right. It was one optimization too far. Restore previous behavior to use MSI by default, unless the user selects not to do so or the allocation of irq_vectors fails. Fixes: 672ff5e3596ee ('ASoC: SOF: Intel: hda: add a parameter to disable MSI') Signed-off-by: Pierre-Louis Bossart Link: https://lore.kernel.org/r/20190806170603.10815-1-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown --- sound/soc/sof/intel/hda.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sound/soc/sof/intel/hda.c b/sound/soc/sof/intel/hda.c index 79cce20666b6..53813de7844e 100644 --- a/sound/soc/sof/intel/hda.c +++ b/sound/soc/sof/intel/hda.c @@ -537,7 +537,7 @@ int hda_dsp_probe(struct snd_sof_dev *sdev) * if it fails, use legacy interrupt mode * TODO: support msi multiple vectors */ - if (hda_use_msi && !pci_alloc_irq_vectors(pci, 1, 1, PCI_IRQ_MSI)) { + if (hda_use_msi && pci_alloc_irq_vectors(pci, 1, 1, PCI_IRQ_MSI) > 0) { dev_info(sdev->dev, "use msi interrupt mode\n"); hdev->irq = pci_irq_vector(pci, 0); /* ipc irq number is the same of hda irq */