linux-kernel - Re: [PATCH 1/2] mtd: maps: physmap: Store gpio

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Date:   Thu, 28 Mar 2019 19:59:30 +0000
From:   Chris Packham <Chris.Packham@...iedtelesis.co.nz>
To:     Boris Brezillon <boris.brezillon@...labora.com>
CC:     "bbrezillon@...nel.org" <bbrezillon@...nel.org>,
        "computersforpeace@...il.com" <computersforpeace@...il.com>,
        "dwmw2@...radead.org" <dwmw2@...radead.org>,
        "marek.vasut@...il.com" <marek.vasut@...il.com>,
        "richard@....at" <richard@....at>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] mtd: maps: physmap: Store gpio_values correctly

On 28/03/19 9:32 PM, Boris Brezillon wrote:
> On Thu, 28 Mar 2019 17:02:15 +1300
> Chris Packham <chris.packham@...iedtelesis.co.nz> wrote:
> 
>> When the gpio-addr-flash.c driver was merged with physmap-core.c the
>> code to store the current gpio_values was lost. This meant that once a
>> gpio was asserted it was never de-asserted. Fix this by storing the
>> current offset in gpio_values like the old driver used to.
>>
>> Fixes: commit ba32ce95cbd9 ("mtd: maps: Merge gpio-addr-flash.c into physmap-core.c")
> 
> You miss
> 
> Cc: <stable@...r.kernel.org>
> 

I wasn't sure. As the original commit said there are no in-tree users of 
  addr-gpios so maybe no-one else noticed. I'll wait for any other 
comments and send a v2 with a Cc for stable.

>> Signed-off-by: Chris Packham <chris.packham@...iedtelesis.co.nz>
> 
> Reviewed-by: Boris Brezillon <boris.brezillon@...labora.com>
> 
>> ---
>>   drivers/mtd/maps/physmap-core.c | 2 ++
>>   1 file changed, 2 insertions(+)
>>
>> diff --git a/drivers/mtd/maps/physmap-core.c b/drivers/mtd/maps/physmap-core.c
>> index d9a3e4bebe5d..21b556afc305 100644
>> --- a/drivers/mtd/maps/physmap-core.c
>> +++ b/drivers/mtd/maps/physmap-core.c
>> @@ -132,6 +132,8 @@ static void physmap_set_addr_gpios(struct physmap_flash_info *info,
>>   
>>   		gpiod_set_value(info->gpios->desc[i], !!(BIT(i) & ofs));
>>   	}
>> +
>> +	info->gpio_values = ofs;
>>   }
>>   
>>   #define win_mask(order)		(BIT(order) - 1)
> 
>