Re: [PATCH] libata: error processing + rw 6 byte fix

[Jens Axboe <axboe@suse.de>]

On Mon, Aug 22 2005, Douglas Gilbert wrote:
>  	if (scsicmd[0] == READ_6 || scsicmd[0] == WRITE_6) {
> -		qc->nsect = tf->nsect = scsicmd[4];
> +		if (scsicmd[4] == 0) {
> +			/*
> +			 * For READ_6 and WRITE_6 (only)
> +			 * transfer_len==0 -> 256 blocks !!
> +			 */
> +			if (lba48) {
> +				tf->hob_nsect = 1;
> +				qc->nsect = 256;
> +			} else
> +				return 1;

This isn't quite right, for 28-bit lba a 0 sector value means 256
sectors to transfer as well. So just make that:

        if (lba48) {
                tf->hob_nsect = 1;
                qc->nsect = 256;
        }

        /* continue */

and it should work fine. Similarly for 48-bit lba, 0 means 16^2 sectors.

-- 
Jens Axboe