diff options
| -rw-r--r-- | drivers/pci/hotplug/pciehp_hpc.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c index 51a5055f696..19eba2a2f74 100644 --- a/drivers/pci/hotplug/pciehp_hpc.c +++ b/drivers/pci/hotplug/pciehp_hpc.c @@ -279,6 +279,7 @@ static int pcie_write_cmd(struct slot *slot, u16 cmd, u16 mask) slot_ctrl |= ((cmd & mask) | CMD_CMPL_INTR_ENABLE); ctrl->cmd_busy = 1; + smp_mb(); retval = pciehp_writew(ctrl, SLOTCTRL, slot_ctrl); if (retval) err("%s: Cannot write to SLOTCTRL register\n", __func__); @@ -759,6 +760,7 @@ static irqreturn_t pcie_isr(int irq, void *dev_id) /* Check Command Complete Interrupt Pending */ if (intr_loc & CMD_COMPLETED) { ctrl->cmd_busy = 0; + smp_mb(); wake_up_interruptible(&ctrl->queue); } |