linux-kernel - Re: [PATCH v2 2/4] PCI: pciehp: Switch LED indicators with a single write

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Message-ID: <e96f6fe1-c76d-f264-7692-fc3d1c40cba4@linux.intel.com>
Date:   Mon, 12 Aug 2019 11:27:26 -0700
From:   sathyanarayanan kuppuswamy 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>
To:     Denis Efremov <efremov@...ux.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>
Cc:     Lukas Wunner <lukas@...ner.de>, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/4] PCI: pciehp: Switch LED indicators with a single
 write

Hi,

On 8/11/19 12:59 PM, Denis Efremov wrote:
> This patch replaces all consecutive switches of power and attention
> indicators with pciehp_set_indicators() call. Thus, performing only
> single write to a register.
>
> Reviewed-by: Lukas Wunner <lukas@...ner.de>
> Signed-off-by: Denis Efremov <efremov@...ux.com>
Reviewed-by: Kuppuswamy Sathyanarayanan 
<sathyanarayanan.kuppuswamy@...ux.intel.com>
> ---
>   drivers/pci/hotplug/pciehp_ctrl.c | 14 +++++---------
>   drivers/pci/hotplug/pciehp_hpc.c  |  3 +--
>   2 files changed, 6 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/pci/hotplug/pciehp_ctrl.c b/drivers/pci/hotplug/pciehp_ctrl.c
> index 631ced0ab28a..258a4060466d 100644
> --- a/drivers/pci/hotplug/pciehp_ctrl.c
> +++ b/drivers/pci/hotplug/pciehp_ctrl.c
> @@ -42,8 +42,7 @@ static void set_slot_off(struct controller *ctrl)
>   		msleep(1000);
>   	}
>   
> -	pciehp_green_led_off(ctrl);
> -	pciehp_set_attention_status(ctrl, 1);
> +	pciehp_set_indicators(ctrl, PWR_OFF, ATTN_ON);
>   }
>   
>   /**
> @@ -90,8 +89,7 @@ static int board_added(struct controller *ctrl)
>   		}
>   	}
>   
> -	pciehp_green_led_on(ctrl);
> -	pciehp_set_attention_status(ctrl, 0);
> +	pciehp_set_indicators(ctrl, PWR_ON, ATTN_OFF);
>   	return 0;
>   
>   err_exit:
> @@ -172,8 +170,7 @@ void pciehp_handle_button_press(struct controller *ctrl)
>   				  slot_name(ctrl));
>   		}
>   		/* blink green LED and turn off amber */
> -		pciehp_green_led_blink(ctrl);
> -		pciehp_set_attention_status(ctrl, 0);
> +		pciehp_set_indicators(ctrl, PWR_BLINK, ATTN_OFF);
>   		schedule_delayed_work(&ctrl->button_work, 5 * HZ);
>   		break;
>   	case BLINKINGOFF_STATE:
> @@ -187,12 +184,11 @@ void pciehp_handle_button_press(struct controller *ctrl)
>   		cancel_delayed_work(&ctrl->button_work);
>   		if (ctrl->state == BLINKINGOFF_STATE) {
>   			ctrl->state = ON_STATE;
> -			pciehp_green_led_on(ctrl);
> +			pciehp_set_indicators(ctrl, PWR_ON, ATTN_OFF);
>   		} else {
>   			ctrl->state = OFF_STATE;
> -			pciehp_green_led_off(ctrl);
> +			pciehp_set_indicators(ctrl, PWR_OFF, ATTN_OFF);
>   		}
> -		pciehp_set_attention_status(ctrl, 0);
>   		ctrl_info(ctrl, "Slot(%s): Action canceled due to button press\n",
>   			  slot_name(ctrl));
>   		break;
> diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
> index 5a690b1579ec..68b880bc30db 100644
> --- a/drivers/pci/hotplug/pciehp_hpc.c
> +++ b/drivers/pci/hotplug/pciehp_hpc.c
> @@ -676,8 +676,7 @@ static irqreturn_t pciehp_ist(int irq, void *dev_id)
>   	if ((events & PCI_EXP_SLTSTA_PFD) && !ctrl->power_fault_detected) {
>   		ctrl->power_fault_detected = 1;
>   		ctrl_err(ctrl, "Slot(%s): Power fault\n", slot_name(ctrl));
> -		pciehp_set_attention_status(ctrl, 1);
> -		pciehp_green_led_off(ctrl);
> +		pciehp_set_indicators(ctrl, PWR_OFF, ATTN_ON);
>   	}
>   
>   	/*

-- 
Sathyanarayanan Kuppuswamy
Linux kernel developer