[U-Boot] [PATCH v3] imls: Add support to list images in NAND device

[Scott Wood <scottwood@freescale.com>]

On 12/14/2012 03:32:04 AM, Vipin Kumar wrote:
>>> +
>>> +			switch (genimg_get_format(buffer)) {
>>> +			case IMAGE_FORMAT_LEGACY:
>>> +				header = (const image_header_t *)buffer;
>>> +				len = image_get_image_size(header);
>>> +
>>> +				ret = nand_imls_legacyimage(nand,
>>> nand_dev,
>>> +						off, len);
>>> +				if (ret<  0&&  ret != -ENOMEM)
>>> +					return ret;
>>> +				break;
>>> +#if defined(CONFIG_FIT)
>>> +			case IMAGE_FORMAT_FIT:
>>> +				len = fit_get_size(buffer);
>>> +				ret = nand_imls_fitimage(nand, nand_dev,
>>> +						off, len);
>>> +				if (ret<  0&&  ret != -ENOMEM)
>>> +					return ret;
>>> +				break;
>>> +#endif
>>> +			}
>> 
>> Do you really mean to return from the main imls function just because
>> one image has an error?  By "use return" I meant return from the
>> subfunction.
>> 
> 
> This return only corresponds to the situation when there is an error  
> returned from nand read routine. In that case, I don't think there is  
> any use reading the NAND any further.

Just because one page has an uncorrectable error doesn't mean the  
entire NAND is bad.  Note that this is different from what you  
currently do if you get an error on the initial read where you look for  
a header.

Might want to bail out if you get an excessive amount of errors  
(particularly consecutive), though, suggesting that the NAND might not  
be working at all.  The user probably doesn't want to wait for  
thousands of error messages to scroll by in that case.

-Scott