diff options
| -rw-r--r-- | drivers/pci/hotplug/pciehp_hpc.c | 58 |
1 files changed, 32 insertions, 26 deletions
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c index b8efe1bbc4f4..625fa6a2f3ab 100644 --- a/drivers/pci/hotplug/pciehp_hpc.c +++ b/drivers/pci/hotplug/pciehp_hpc.c @@ -535,7 +535,7 @@ void pciehp_power_off_slot(struct slot *slot) PCI_EXP_SLTCTL_PWR_OFF); } -static irqreturn_t pcie_isr(int irq, void *dev_id) +static irqreturn_t pciehp_isr(int irq, void *dev_id) { struct controller *ctrl = (struct controller *)dev_id; struct pci_dev *pdev = ctrl_dev(ctrl); @@ -550,36 +550,23 @@ static irqreturn_t pcie_isr(int irq, void *dev_id) if (pdev->current_state == PCI_D3cold) return IRQ_NONE; + pcie_capability_read_word(pdev, PCI_EXP_SLTSTA, &status); + if (status == (u16) ~0) { + ctrl_info(ctrl, "%s: no response from device\n", __func__); + return IRQ_NONE; + } + /* - * In order to guarantee that all interrupt events are - * serviced, we need to re-inspect Slot Status register after - * clearing what is presumed to be the last pending interrupt. + * Slot Status contains plain status bits as well as event + * notification bits; right now we only want the event bits. */ - events = 0; - do { - pcie_capability_read_word(pdev, PCI_EXP_SLTSTA, &status); - if (status == (u16) ~0) { - ctrl_info(ctrl, "%s: no response from device\n", - __func__); - return IRQ_NONE; - } - - /* - * Slot Status contains plain status bits as well as event - * notification bits; right now we only want the event bits. - */ - status &= (PCI_EXP_SLTSTA_ABP | PCI_EXP_SLTSTA_PFD | + events = status & (PCI_EXP_SLTSTA_ABP | PCI_EXP_SLTSTA_PFD | PCI_EXP_SLTSTA_PDC | PCI_EXP_SLTSTA_CC | PCI_EXP_SLTSTA_DLLSC); - status &= ~events; - events |= status; - if (!events) - return IRQ_NONE; - if (status) - pcie_capability_write_word(pdev, PCI_EXP_SLTSTA, - events); - } while (status); + if (!events) + return IRQ_NONE; + pcie_capability_write_word(pdev, PCI_EXP_SLTSTA, events); ctrl_dbg(ctrl, "pending interrupts %#06x from Slot Status\n", events); /* Check Command Complete Interrupt Pending */ @@ -636,6 +623,25 @@ static irqreturn_t pcie_isr(int irq, void *dev_id) return IRQ_HANDLED; } +static irqreturn_t pcie_isr(int irq, void *dev_id) +{ + irqreturn_t rc, handled = IRQ_NONE; + + /* + * To guarantee that all interrupt events are serviced, we need to + * re-inspect Slot Status register after clearing what is presumed + * to be the last pending interrupt. + */ + do { + rc = pciehp_isr(irq, dev_id); + if (rc == IRQ_HANDLED) + handled = IRQ_HANDLED; + } while (rc == IRQ_HANDLED); + + /* Return IRQ_HANDLED if we handled one or more events */ + return handled; +} + void pcie_enable_notification(struct controller *ctrl) { u16 cmd, mask; |