Albert Lee wrote:
.. Maybe we can wait a moment and give the slow ATAPI devices some time to set DRQ. Could you please try if the attached patch works, thanks. -- albert--- linux-2.6.20.3/drivers/ata/libata-core.c 2007-03-15 18:03:27.000000000 +0800 +++ linux-2.6.20.3-mod2/drivers/ata/libata-core.c 2007-03-17 01:12:53.000000000 +0800 @@ -4384,6 +4384,19 @@ fsm_start: */ poll_next = (qc->tf.flags & ATA_TFLAG_POLLING);+ /* wait for some slow ATAPI devices to set DRQ */+ if (unlikely((status & ATA_DRQ) == 0) && + is_atapi_taskfile(&qc->tf)) { + int max = 100; + + do { + udelay(10); + status = ata_chk_status(ap); + max--; + ata_port_printk(ap, KERN_ERR, "wait for DRQ %d\n", 100-max); + } while (((status & ATA_DRQ) == 0) && (max > 0)); + } + /* check device status */ if (unlikely((status & ATA_DRQ) == 0)) { /* handle BSY=0, DRQ=0 as error */
I patched the above in, and it was NEVER hit. -ml - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
