Messages in this thread |  | | Date | Thu, 22 Aug 2002 21:26:04 -0400 | From | Jeff Garzik <> | Subject | Re: IDE-flash device and hard disk on same controller |
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Eric W. Biederman wrote: > The problem is that immediately after bootup ATA devices do not respond until > their media has spun up. Which is both required by the spec, and observed in > practice. Which is likely a problem if this code is run a few seconds after > bootup. Which makes it quite possible the drive will ignore the EXECUTE DEVICE > DIAGNOSTICS and your error code won't be valid when the bsy flag > clears. I don't know how serious that would be.
Well, this only applies if you are slack and letting the kernel init your ATA from scratch, instead of doing proper ATA initialization in firmware ;-)
Seriously, if you are a handed an ATA device that is actually in operation when the kernel boots, you are already out of spec. I would prefer to barf if the BSY or DRDY bits are set, because taking over the ATA bus while a device is in the middle of a command shouldn't be happening at Linux kernel boot, ever.
Jeff
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