linux-kernel - Re: [PATCH 2/6] Drivers: hv: hv_balloon: keep locks balanced on add

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Date:	Thu, 12 Mar 2015 11:45:43 +0100
From:	Olaf Hering <olaf@...fle.de>
To:	"K. Y. Srinivasan" <kys@...rosoft.com>
Cc:	gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
	devel@...uxdriverproject.org, apw@...onical.com,
	vkuznets@...hat.com
Subject: Re: [PATCH 2/6] Drivers: hv: hv_balloon: keep locks balanced on
 add_memory() failure

On Wed, Mar 11, K. Y. Srinivasan wrote:

> +++ b/drivers/hv/hv_balloon.c
> @@ -652,6 +652,7 @@ static void hv_mem_hot_add(unsigned long start, unsigned long size,
>  			}
>  			has->ha_end_pfn -= HA_CHUNK;
>  			has->covered_end_pfn -=  processed_pfn;
> +			mutex_lock(&dm_device.ha_region_mutex);
>  			break;
>  		}

Should it call the wrapper instead of doing mutex_lock directly?
Like 'acquire_region_mutex(false);'.

Olaf
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