linux-kernel - Re: [PATCH 14/18] ide: use ->tf_read in ide_read

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Date:	Tue, 17 Feb 2009 03:14:57 +0300
From:	Sergei Shtylyov <sshtylyov@...mvista.com>
To:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Cc:	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 14/18] ide: use ->tf_read in ide_read_error()

Hello.

Bartlomiej Zolnierkiewicz wrote:

>>>>>   register and handle it in ->tf_read.
>>>>>   
>>>>>           
>>>>  Doesn't seem like a good name -- you can't read the features 
>>>> register. I should've commented to this patch earlier, of course...
>>>>         
>
> [ Yeah... preferably in June 2008 when this patch was posted... ]
>   

   I was too busy acquainting myself with the wonderful world of ARM and 
MUSB back then... :-/

>>> * Add IDE_TFLAG_IN_FEATURE taskfile flag for reading Feature
>>>       
>
> Trivial s/IN_*FEATURE/IN_*ERROR/ should do the job.
>
> I will fix it later unless you beat me to it.
>   

   Well, if I'm going to get my hands in the transport methods anyway, I 
think I'll address it.

>>>   Moreover, the error register shoudn't be affeceted by the HOB bit, 
>>> so this flag doesn't make sense.
>>>       
>>    I meant IDE_TFLAG_IN_HOB_FEATURE, of course.
>>     
>
> Once again blame the certain ioctl (you know which one)... :)
>   

   Oh, horror... and I know that it wasn't completely ungrounded since 
both ATA/PI-6 adn -7 have words about reading the features register 
(depending on HOB). At least ATA/PI-8 got rid of this. Anyway, I think 
we can safely get rid of this flag and just return the same value in 
'features' and 'hob_features'. Besides, union ide_reg_valid_s also has 
such interesting fields as 'select_hob' and 'control_hob' but they seem 
to be ignored altogether (as long as 'select') if I don't mistake...

> Thanks,
> Bart
>   

MBR, Sergei

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