A question on ECC

[Edward J. Lee]

Thomas Gleixner wrote:

>On Monday 14 April 2003 19:40, Edward J. Lee wrote:
>  
>
>>this->eccmode is indeed set to NAND_ECC_SOFT.
>>I guess my case is kind of 'extra-tricky'. I just found out another
>>weird thing,
>>that the warning messages complaining '...without ECC...' do NOT appear
>>when I'm 'writing' on the chip. Strange, eh. :'(
>>    
>>
>
>Can you put some debug output YAFFS ?
>
>--- yaffs_mtdif.c	8 Apr 2003 19:53:44 -0000	1.9
>+++ yaffs_mtdif.c	14 Apr 2003 10:23:39 -0000
>@@ -90,10 +90,12 @@
> 		if(dev->useNANDECC)
> 		{   // Careful, this call adds 2 ints to the end of the spare data.  
>Calling function should
>             // allocate enough memory for spare, i.e. 
>[YAFFS_BYTES_PER_SPARE+2*sizeof(int)].
>+	    	printk (KERN_DEBUG "YAFFS ReadChunk with real ECC_INFO\n");
>     		retval = 
>mtd->read_ecc(mtd,addr,dev->nBytesPerChunk,&dummy,data,spareAsBytes,&yaffs_oobinfo);            
> 		}
> 		else
> 		{
>+		    	printk (KERN_DEBUG "YAFFS ReadChunk with dummy ECC_INFO\n");
> 			retval = 
>mtd->read_ecc(mtd,addr,dev->nBytesPerChunk,&dummy,data,spareAsBytes,&yaffs_noeccinfo);
> 		}
> 	}
>
>
>  
>
I tried this last night, and I got a bunch of "YAFFS ReadChunk with real 
ECC_INFO".
when both reading/writing.
Nothing else, do we need more information?