From: Keith Busch Date: Thu, 20 Jul 2017 23:33:54 +0000 (-0400) Subject: PCI: vmd: Assign vector zero to all bridges X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f2586c678cb29f40a37c9c88a22b13d35484ffdc;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git PCI: vmd: Assign vector zero to all bridges We don't want slower IRQ handlers impacting faster devices that happen to be assigned the same VMD interrupt vector. The driver was trying to separate such devices by checking if MSI-X wasn't used, but really we just don't want endpoint devices to share with bridges. Most bridges may use MSI currently, so that criteria happened to work, but newer ones may use MSI-X, so this patch explicitly checks the device type when choosing a vector. Signed-off-by: Keith Busch Signed-off-by: Bjorn Helgaas --- diff --git a/drivers/pci/host/vmd.c b/drivers/pci/host/vmd.c index 539da102f3d7..7e967a8784b2 100644 --- a/drivers/pci/host/vmd.c +++ b/drivers/pci/host/vmd.c @@ -183,7 +183,7 @@ static struct vmd_irq_list *vmd_next_irq(struct vmd_dev *vmd, struct msi_desc *d int i, best = 1; unsigned long flags; - if (!desc->msi_attrib.is_msix || vmd->msix_count == 1) + if (pci_is_bridge(msi_desc_to_pci_dev(desc)) || vmd->msix_count == 1) return &vmd->irqs[0]; raw_spin_lock_irqsave(&list_lock, flags);