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| author | Tejun Heo <teheo@novell.com> | 2010-09-09 17:13:31 +0200 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2010-09-09 22:27:44 -0400 |
| commit | 40c6023031369ae5573e622ca54fa3ffe89fb865 (patch) | |
| tree | 62c254cf5d2b302cc0f961394eb269bd0bd0a3c9 | |
| parent | f1f5a807b051eddd3f302e503d39214e5bde0ef2 (diff) | |
| download | op-kernel-dev-40c6023031369ae5573e622ca54fa3ffe89fb865.zip op-kernel-dev-40c6023031369ae5573e622ca54fa3ffe89fb865.tar.gz | |
libata,pata_via: revert ata_wait_idle() removal from ata_sff/via_tf_load()
Commit 978c0666 (libata: Remove excess delay in the tf_load path)
removed ata_wait_idle() from ata_sff_tf_load() and via_tf_load().
This caused obscure detection problems in sata_sil.
https://bugzilla.kernel.org/show_bug.cgi?id=16606
The commit was pure performance optimization. Revert it for now.
Reported-by: Dieter Plaetinck <dieter@plaetinck.be>
Reported-by: Jan Beulich <JBeulich@novell.com>
Bisected-by: gianluca <gianluca@sottospazio.it>
Cc: stable@kernel.org
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| -rw-r--r-- | drivers/ata/libata-sff.c | 3 | ||||
| -rw-r--r-- | drivers/ata/pata_via.c | 2 |
2 files changed, 5 insertions, 0 deletions
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c index 3b82d8e..dee3c2c 100644 --- a/drivers/ata/libata-sff.c +++ b/drivers/ata/libata-sff.c @@ -418,6 +418,7 @@ void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf) if (ioaddr->ctl_addr) iowrite8(tf->ctl, ioaddr->ctl_addr); ap->last_ctl = tf->ctl; + ata_wait_idle(ap); } if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) { @@ -453,6 +454,8 @@ void ata_sff_tf_load(struct ata_port *ap, const struct ata_taskfile *tf) iowrite8(tf->device, ioaddr->device_addr); VPRINTK("device 0x%X\n", tf->device); } + + ata_wait_idle(ap); } EXPORT_SYMBOL_GPL(ata_sff_tf_load); diff --git a/drivers/ata/pata_via.c b/drivers/ata/pata_via.c index 5e65988..ac8d7d9 100644 --- a/drivers/ata/pata_via.c +++ b/drivers/ata/pata_via.c @@ -417,6 +417,8 @@ static void via_tf_load(struct ata_port *ap, const struct ata_taskfile *tf) tf->lbam, tf->lbah); } + + ata_wait_idle(ap); } static int via_port_start(struct ata_port *ap) |
