linux-kernel - Re: [PATCH v2 1/3] mtd: lpddr: Fix bad logic in print_drs

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Date:   Tue, 19 May 2020 11:22:22 -0500
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Miquel Raynal <miquel.raynal@...tlin.com>
Cc:     linux-kernel@...r.kernel.org, Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-mtd@...ts.infradead.org, Joe Perches <joe@...ches.com>
Subject: Re: [PATCH v2 1/3] mtd: lpddr: Fix bad logic in print_drs_error

Hi all,

Friendly ping: who can take this?

Thanks
--
Gustavo

On 4/27/20 15:08, Miquel Raynal wrote:
> Hi Gustavo,
> 
> "Gustavo A. R. Silva" <gustavo@...eddedor.com> wrote on Mon, 27 Apr
> 2020 14:50:37 -0500:
> 
>> Update logic for broken test. Use a more common logging style.
>>
>> It appears the logic in this function is broken for the
>> consecutive tests of
>>
>>         if (prog_status & 0x3)
>>                 ...
>>         else if (prog_status & 0x2)
>>                 ...
>>         else (prog_status & 0x1)
>>                 ...
>>
>> Likely the first test should be
>>
>>         if ((prog_status & 0x3) == 0x3)
>>
>> Found by inspection of include files using printk.
>>
>> Fixes: eb3db27507f7 ("[MTD] LPDDR PFOW definition")
>> Cc: stable@...r.kernel.org
>> Reported-by: Joe Perches <joe@...ches.com>
>> Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
>> ---
>> Changes in v2:
>>  - None.
>>
>>  include/linux/mtd/pfow.h | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/include/linux/mtd/pfow.h b/include/linux/mtd/pfow.h
>> index 122f3439e1af..c65d7a3be3c6 100644
>> --- a/include/linux/mtd/pfow.h
>> +++ b/include/linux/mtd/pfow.h
>> @@ -128,7 +128,7 @@ static inline void print_drs_error(unsigned dsr)
>>  
>>  	if (!(dsr & DSR_AVAILABLE))
>>  		printk(KERN_NOTICE"DSR.15: (0) Device not Available\n");
>> -	if (prog_status & 0x03)
>> +	if ((prog_status & 0x03) == 0x03)
>>  		printk(KERN_NOTICE"DSR.9,8: (11) Attempt to program invalid "
>>  						"half with 41h command\n");
>>  	else if (prog_status & 0x02)
> 
> 
> Acked-by: Miquel Raynal <miquel.raynal@...tlin.com>
> 
> 
> Thanks,
> Miquèl
>