Hello. Jan Evert van Grootheest wrote:
Prefetch needs to be set for some ide devices to work when connected to
Prefetch bit seems to mean 1=disable, 0=enable despite what the datasheet says...
a ht6560b interface. This was not always done properly, causing a system with a HD and CD on the primary interface to not work properly. Or, in effect, hang hard.
This patch forces prefetch on devices before checking whether it is necessary to change the settings in the interface
This patch should also be applied to 2.4. I don't currently have a 2.4 tree around.
(also change my email address)
Signed-off-by: Jan Evert van Grootheest <janevert@xxxxxxxxx>
Please send the patch to the current 2.4 maintainer, after applying it to the 2.4 tree which you can download on kernel.org.
------------------------------------------------------------------------ --- linux-2.6.git/drivers/ide/legacy/ht6560b.c 2008-02-01 18:50:31.000000000 +0100 +++ linux-2.6.24/drivers/ide/legacy/ht6560b.c 2008-02-18 13:48:59.000000000 +0100 @@ -23,18 +23,21 @@ * "Prefetch" mode bit OFF for ide disks and * ON for anything else. * + * Version 0.08 Need to force prefetch for CDs and other non-disk + * devices. (not sure which devices exactly need + * prefetch) *
Hard disks only ai guess, i.e. non-ATAPI device. MBR, Sergei - 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
