From: Mayurkumar Patel Date: Tue, 23 Aug 2016 08:58:51 +0000 (+0000) Subject: PCI: pciehp: Don't re-read Slot Status when handling surprise event X-Git-Tag: v4.9-rc1~32^2~10^2~5 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=69bd3c5b28e7c988886efb3c9a7614a612eef45d;p=platform%2Fkernel%2Flinux-exynos.git PCI: pciehp: Don't re-read Slot Status when handling surprise event Previously we read Slot Status when handling a surprise event. But Slot Status might have changed since we identified the event, and the event_type already tells us whether to enable or disable the slot, so there's no need to read it again. Remove handle_surprise_event() and queue the power work directly. [bhelgaas: changelog] Tested-by: Lukas Wunner Signed-off-by: Mayurkumar Patel Signed-off-by: Bjorn Helgaas Reviewed-by: Mika Westerberg Acked-by: Rajat Jain --- diff --git a/drivers/pci/hotplug/pciehp_ctrl.c b/drivers/pci/hotplug/pciehp_ctrl.c index 7ea3e61..a787684 100644 --- a/drivers/pci/hotplug/pciehp_ctrl.c +++ b/drivers/pci/hotplug/pciehp_ctrl.c @@ -302,20 +302,6 @@ static void handle_button_press_event(struct slot *p_slot) /* * Note: This function must be called with slot->lock held */ -static void handle_surprise_event(struct slot *p_slot) -{ - u8 getstatus; - - pciehp_get_adapter_status(p_slot, &getstatus); - if (!getstatus) - pciehp_queue_power_work(p_slot, DISABLE_REQ); - else - pciehp_queue_power_work(p_slot, ENABLE_REQ); -} - -/* - * Note: This function must be called with slot->lock held - */ static void handle_link_event(struct slot *p_slot, u32 event) { struct controller *ctrl = p_slot->ctrl; @@ -378,14 +364,14 @@ static void interrupt_event_handler(struct work_struct *work) pciehp_green_led_off(p_slot); break; case INT_PRESENCE_ON: - handle_surprise_event(p_slot); + pciehp_queue_power_work(p_slot, ENABLE_REQ); break; case INT_PRESENCE_OFF: /* * Regardless of surprise capability, we need to * definitely remove a card that has been pulled out! */ - handle_surprise_event(p_slot); + pciehp_queue_power_work(p_slot, DISABLE_REQ); break; case INT_LINK_UP: case INT_LINK_DOWN: