[PATCH] PCI, pciehp: Reuse set_slot_off()

[PATCH] PCI, pciehp: Reuse set_slot_off()

[Yinghai Lu]

Now set_slot_off() is used in board_added() err path.

We could reuse in remove_board.

Also need to move green_led and attention_status out it.
and make code more readable.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>

---
 drivers/pci/hotplug/pciehp_ctrl.c |   16 +++-------------
 1 file changed, 3 insertions(+), 13 deletions(-)

Index: linux-2.6/drivers/pci/hotplug/pciehp_ctrl.c
===================================================================
--- linux-2.6.orig/drivers/pci/hotplug/pciehp_ctrl.c
+++ linux-2.6/drivers/pci/hotplug/pciehp_ctrl.c
@@ -71,9 +71,6 @@ static void set_slot_off(struct controll
 		 */
 		msleep(1000);
 	}
-
-	pciehp_green_led_off(pslot);
-	pciehp_set_attention_status(pslot, 1);
 }
 
 /**
@@ -126,6 +123,8 @@ static int board_added(struct slot *p_sl
 
 err_exit:
 	set_slot_off(ctrl, p_slot);
+	pciehp_green_led_off(p_slot);
+	pciehp_set_attention_status(p_slot, 1);
 	return retval;
 }
 
@@ -142,16 +141,7 @@ static int remove_board(struct slot *p_s
 	if (retval)
 		return retval;
 
-	if (POWER_CTRL(ctrl)) {
-		pciehp_power_off_slot(p_slot);
-
-		/*
-		 * After turning power off, we must wait for at least 1 second
-		 * before taking any action that relies on power having been
-		 * removed from the slot/adapter.
-		 */
-		msleep(1000);
-	}
+	set_slot_off(ctrl, p_slot);
 
 	/* turn off Green LED */
 	pciehp_green_led_off(p_slot);

Re: [PATCH] PCI, pciehp: Reuse set_slot_off()

[Raj, Ashok]

Hi Yinghai

On Thu, Feb 23, 2017 at 10:54:35PM -0800, Yinghai Lu wrote:
> +++ linux-2.6/drivers/pci/hotplug/pciehp_ctrl.c
> @@ -71,9 +71,6 @@ static void set_slot_off(struct controll
>  		 */
>  		msleep(1000);
>  	}
> -
> -	pciehp_green_led_off(pslot);
> -	pciehp_set_attention_status(pslot, 1);

Re using set_slot_off() in remove_board() make sense.. but i'm not sure
why these are pulled out? It seems to be functionally complete 
when these are done in set_slot_off(). 

>  }
>  
>  /**
> @@ -126,6 +123,8 @@ static int board_added(struct slot *p_sl
>  
>  err_exit:
>  	set_slot_off(ctrl, p_slot);
> +	pciehp_green_led_off(p_slot);
> +	pciehp_set_attention_status(p_slot, 1);
>  	return retval;
>  }
>  
> @@ -142,16 +141,7 @@ static int remove_board(struct slot *p_s
>  	if (retval)
>  		return retval;
>  
> -	if (POWER_CTRL(ctrl)) {
> -		pciehp_power_off_slot(p_slot);
> -
> -		/*
> -		 * After turning power off, we must wait for at least 1 second
> -		 * before taking any action that relies on power having been
> -		 * removed from the slot/adapter.
> -		 */
> -		msleep(1000);
> -	}
> +	set_slot_off(ctrl, p_slot);
>  
>  	/* turn off Green LED */
>  	pciehp_green_led_off(p_slot);
Don't we need the pciehp_set_attention_status() here?

Cheers,
Ashok

Re: [PATCH] PCI, pciehp: Reuse set_slot_off()

[Yinghai Lu]

On Fri, Feb 24, 2017 at 9:17 AM, Raj, Ashok <ashok.raj@intel.com> wrote:
> On Thu, Feb 23, 2017 at 10:54:35PM -0800, Yinghai Lu wrote:
>> +++ linux-2.6/drivers/pci/hotplug/pciehp_ctrl.c
>> @@ -71,9 +71,6 @@ static void set_slot_off(struct controll
>>                */
>>               msleep(1000);
>>       }
>> -
>> -     pciehp_green_led_off(pslot);
>> -     pciehp_set_attention_status(pslot, 1);
>
> Re using set_slot_off() in remove_board() make sense.. but i'm not sure
> why these are pulled out? It seems to be functionally complete
> when these are done in set_slot_off().

Just don't want to the led operation is wrapped too deep inside.

In board_added(), has led operation code directly for success path.

so put led operation code directly for error path make them more symmetrically.

>
>>  }
>>
>>  /**
>> @@ -126,6 +123,8 @@ static int board_added(struct slot *p_sl
>>
>>  err_exit:
>>       set_slot_off(ctrl, p_slot);
>> +     pciehp_green_led_off(p_slot);
>> +     pciehp_set_attention_status(p_slot, 1);
>>       return retval;
>>  }
>>
>> @@ -142,16 +141,7 @@ static int remove_board(struct slot *p_s
>>       if (retval)
>>               return retval;
>>
>> -     if (POWER_CTRL(ctrl)) {
>> -             pciehp_power_off_slot(p_slot);
>> -
>> -             /*
>> -              * After turning power off, we must wait for at least 1 second
>> -              * before taking any action that relies on power having been
>> -              * removed from the slot/adapter.
>> -              */
>> -             msleep(1000);
>> -     }
>> +     set_slot_off(ctrl, p_slot);
>>
>>       /* turn off Green LED */
>>       pciehp_green_led_off(p_slot);
> Don't we need the pciehp_set_attention_status() here?

that attention led could be on if previous power on is not done successfully

Thanks

Yinghai.