linux-kernel - Re: [BUG] 2.6.24-git usb reset problems

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Date:	Tue, 29 Jan 2008 17:54:52 +0200
From:	Boaz Harrosh <bharrosh@...asas.com>
To:	Alan Stern <stern@...land.harvard.edu>
CC:	Greg KH <greg@...ah.com>, Jens Axboe <jens.axboe@...cle.com>,
	Matthew Dharm <mdharm-usb@...-eyed-alien.net>,
	linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
	linux-scsi@...r.kernel.org
Subject: Re: [BUG] 2.6.24-git usb reset problems

On Tue, Jan 29 2008 at 17:36 +0200, Alan Stern <stern@...land.harvard.edu> wrote:
> On Tue, 29 Jan 2008, Boaz Harrosh wrote:
> 
>> --- a/drivers/usb/storage/transport.c
>> +++ b/drivers/usb/storage/transport.c
>> @@ -462,18 +462,24 @@ static int usb_stor_bulk_transfer_sglist(struct us_data *us, unsigned int pipe,
>>   * Common used function. Transfer a complete command
>>   * via usb_stor_bulk_transfer_sglist() above. Set cmnd resid
>>   */
>> -int usb_stor_bulk_srb(struct us_data* us, unsigned int pipe,
>> -		      struct scsi_cmnd* srb)
>> +int usb_stor_bulk_srb_length(struct us_data* us, unsigned int pipe,
>> +		      struct scsi_cmnd* srb, unsigned length)
>>  {
>>  	unsigned int partial;
>>  	int result = usb_stor_bulk_transfer_sglist(us, pipe, scsi_sglist(srb),
>> -				      scsi_sg_count(srb), scsi_bufflen(srb),
>> +				      scsi_sg_count(srb), length,
>>  				      &partial);
>>  
>>  	scsi_set_resid(srb, scsi_bufflen(srb) - partial);
>>  	return result;
>>  }
>>  
>> +int usb_stor_bulk_srb(struct us_data* us, unsigned int pipe,
>> +		struct scsi_cmnd* srb)
>> +{
>> +	return usb_stor_bulk_srb_length(us, pipe, srb, scsi_bufflen(srb));
>> +}
>> +
> 
> I don't like this patch very much.  Why add another layer of 
> indirection when the two subroutines do hardly any work?  Leave 
> usb_stor_bulk_srb() the way it was, and add usb_stor_bulk_srb_length() 
> as a separate routine that simply calls usb_stor_bulk_transfer_sglist() 
> and scsi_set_resid().
> 
> BTW, the standard coding style calls for a blank line after the list of 
> local variables at the start of a function or block.
> 
> Alan Stern
> 
> -
Me neither, it's not a proper patch just a shut to try and find the reported
bug. I will submit a proper bug later.

Thanks for the review, you are right on all accounts
Boaz

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