linux-kernel - Re: [PATCH 3/6] UBI: Fastmap: Ensure that all fastmap work is done upon WL shutdown

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Date:	Fri, 09 Jan 2015 18:39:08 -0300
From:	Ezequiel Garcia <ezequiel@...guardiasur.com.ar>
To:	Richard Weinberger <richard@....at>, dedekind1@...il.com
CC:	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/6] UBI: Fastmap: Ensure that all fastmap work is done
 upon WL shutdown



On 01/09/2015 06:37 PM, Richard Weinberger wrote:
> Am 09.01.2015 um 22:32 schrieb Ezequiel Garcia:
>> On 11/24/2014 10:20 AM, Richard Weinberger wrote:
>>> ...otherwise the deferred work might run after datastructures
>>> got freed and corrupt memory.
>>>
>>> Signed-off-by: Richard Weinberger <richard@....at>
>>> ---
>>>  drivers/mtd/ubi/wl.c | 3 +++
>>>  1 file changed, 3 insertions(+)
>>>
>>> diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c
>>> index 7f135df..cb2e571 100644
>>> --- a/drivers/mtd/ubi/wl.c
>>> +++ b/drivers/mtd/ubi/wl.c
>>> @@ -2041,6 +2041,9 @@ static void protection_queue_destroy(struct ubi_device *ubi)
>>>  void ubi_wl_close(struct ubi_device *ubi)
>>>  {
>>>  	dbg_wl("close the WL sub-system");
>>> +#ifdef CONFIG_MTD_UBI_FASTMAP
>>> +	flush_work(&ubi->fm_work);
>>> +#endif
>>>  	shutdown_work(ubi);
>>>  	protection_queue_destroy(ubi);
>>>  	tree_destroy(&ubi->used);
>>>
>>
>> IMHO, it's best to avoid nasty ifdefs like this (there are lots of ways
>> of getting it cleaner). But I guess it's not a big deal.
> 
> I agree that's why I've cleaned up the vast majority of all ifdefs in a later cleanup
> commit. My original plan was to have first pure bug fixes and then cleanups to make
> backporting of my patches easy.
> 

Ah, yes, backporting is a good point.
-- 
Ezequiel Garcia, VanguardiaSur
www.vanguardiasur.com.ar
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