Re: [patch 5/6] ide: fix races in handling of user-space SET XFER commands

[David Miller <davem@davemloft.net>]

From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Date: Tue, 23 Jun 2009 23:35:51 +0200

I just noticed the following while re-reading this patch.

> @@ -322,10 +322,17 @@ static void ide_error_cmd(ide_drive_t *d
>  void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
>  {
>  	struct request *rq = drive->hwif->rq;
> -	u8 err = ide_read_error(drive);
> +	u8 err = ide_read_error(drive), nsect = cmd->tf.nsect;
> +	u8 set_xfer = !!(cmd->tf_flags & IDE_TFLAG_SET_XFER);
>  

There is no reason to use 'u8' for set_xfer.  It's a boolean
so use 'bool' and then you can eliminate that "!!()" double
negate.

The only reason you would need that double-negate is because
cmd->tf_flags is a u16 and IDE_TFLAG_SET_XFER is in fact one
of those upper 8-bits.

Further confirming that a bool would be a better choice here.