From: Mika Westerberg Date: Thu, 27 Sep 2018 21:41:46 +0000 (-0500) Subject: PCI: pciehp: Do not handle events if interrupts are masked X-Git-Tag: v4.20-rc1~128^2~13^2~21 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=720d6a671a6e2cf2b9ed032279b7c21c122bed7e;p=thirdparty%2Fkernel%2Flinux.git PCI: pciehp: Do not handle events if interrupts are masked PCIe native hotplug shares MSI vector with native PME so the interrupt handler might get called even the hotplug interrupt is masked. In that case we should not handle any events because the interrupt was not meant for us. Modify the PCIe hotplug interrupt handler to check this accordingly and bail out if it finds out that the interrupt was not about hotplug. Signed-off-by: Mika Westerberg Signed-off-by: Bjorn Helgaas Reviewed-by: Lukas Wunner --- diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c index 46598b4b0b929..7dd443aea5a54 100644 --- a/drivers/pci/hotplug/pciehp_hpc.c +++ b/drivers/pci/hotplug/pciehp_hpc.c @@ -518,9 +518,11 @@ static irqreturn_t pciehp_isr(int irq, void *dev_id) u16 status, events; /* - * Interrupts only occur in D3hot or shallower (PCIe r4.0, sec 6.7.3.4). + * Interrupts only occur in D3hot or shallower and only if enabled + * in the Slot Control register (PCIe r4.0, sec 6.7.3.4). */ - if (pdev->current_state == PCI_D3cold) + if (pdev->current_state == PCI_D3cold || + (!(ctrl->slot_ctrl & PCI_EXP_SLTCTL_HPIE) && !pciehp_poll_mode)) return IRQ_NONE; /*