Matthew Wilcox wrote:
From: David Woodhouse <David.Woodhouse@xxxxxxxxx> Signed-off-by: David Woodhouse <David.Woodhouse@xxxxxxxxx> [modified to reduce amount of special casing needed for discard] Signed-off-by: Matthew Wilcox <willy@xxxxxxxxxxxxxxx> ---
..
+ task->tf.command = ATA_CMD_DSM; + task->tf.feature = ATA_DSM_TRIM; + task->tf.hob_feature = 0x00; + task->tf.nsect = size / 512; + task->tf.hob_nsect = (size / 512) >> 8;
.. Matthew (or others), Could you perhaps explain what the purpose of the data portion of this command is for? The draft ATA spec I have here has mangled text in the description -- like it's missing a crucial sentence there. So it's not obvious exactly why this command even needs data to be transfered. Thanks -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
