if (!(speed))
if (!speed) return 0;   if (info->speed == NULL)
static int config_chipset_for_dma (ide_drive_t *drive){	u8 speed = ide_dma_speed(drive, hpt3xx_ratemask(drive));	if (!(speed))		return 0;	(void) hpt3xx_tune_chipset(drive, speed);	return ide_dma_enable(drive);}