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| author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2009-10-06 14:46:05 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-10-07 04:07:17 -0700 |
| commit | e13ee546bb06453939014c7b854e77fb643fd6f1 (patch) | |
| tree | 6d4730e7c379565b8015513a91715ae30c6367ef /drivers/ide/sis5513.c | |
| parent | 24df31acaff8465d797f0006437b45ad0f2a5cb1 (diff) | |
| download | linux-e13ee546bb06453939014c7b854e77fb643fd6f1.tar.gz linux-e13ee546bb06453939014c7b854e77fb643fd6f1.tar.bz2 linux-e13ee546bb06453939014c7b854e77fb643fd6f1.zip | |
sis5513: fix PIO setup for ATAPI devices
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>
Diffstat (limited to 'drivers/ide/sis5513.c')
| -rw-r--r-- | drivers/ide/sis5513.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/ide/sis5513.c b/drivers/ide/sis5513.c index afca22beaadf..3b88eba04c9c 100644 --- a/drivers/ide/sis5513.c +++ b/drivers/ide/sis5513.c @@ -2,7 +2,7 @@ * Copyright (C) 1999-2000 Andre Hedrick <andre@linux-ide.org> * Copyright (C) 2002 Lionel Bouton <Lionel.Bouton@inet6.fr>, Maintainer * Copyright (C) 2003 Vojtech Pavlik <vojtech@suse.cz> - * Copyright (C) 2007 Bartlomiej Zolnierkiewicz + * Copyright (C) 2007-2009 Bartlomiej Zolnierkiewicz * * May be copied or modified under the terms of the GNU General Public License * @@ -281,11 +281,13 @@ static void config_drive_art_rwp(ide_drive_t *drive) pci_read_config_byte(dev, 0x4b, ®4bh); + rw_prefetch = reg4bh & ~(0x11 << drive->dn); + if (drive->media == ide_disk) - rw_prefetch = 0x11 << drive->dn; + rw_prefetch |= 0x11 << drive->dn; - if ((reg4bh & (0x11 << drive->dn)) != rw_prefetch) - pci_write_config_byte(dev, 0x4b, reg4bh|rw_prefetch); + if (reg4bh != rw_prefetch) + pci_write_config_byte(dev, 0x4b, rw_prefetch); } static void sis_set_pio_mode(ide_drive_t *drive, const u8 pio) |