sis5513: fix PIO setup for ATAPI devices
commit5a69ea23440767095f377bc80c3f9d756427129a
authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Tue, 6 Oct 2009 14:46:05 +0000 (6 14:46 +0000)
committerGreg Kroah-Hartman <gregkh@suse.de>
Mon, 12 Oct 2009 19:40:21 +0000 (12 12:40 -0700)
tree921f07793687d8bf87efcc56a91c36ca87838944
parent20330dc6f74a8e11294ab2271b514bbdb21abb89
sis5513: fix PIO setup for ATAPI devices

commit e13ee546bb06453939014c7b854e77fb643fd6f1 upstream.

Clear prefetch setting before potentially (re-)enabling it in
config_drive_art_rwp() so the transition of the device type on
the port from ATA to ATAPI (i.e. during warm-plug operation)
is handled correctly.

This is a really old bug (it probably goes back to very early
days of the driver) but it was only affecting warm-plug operation
until the recent "ide: try to use PIO Mode 0 during probe if
possible" change (commit 6029336426a2b43e4bc6f4a84be8789a047d139e).

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Tested-by: David Fries <david@fries.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/ide/sis5513.c