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libata,pata_via: revert ata_wait_idle() removal from ata_sff/via_tf_load()

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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>
This commit is contained in:
Tejun Heo
2010-09-09 17:13:31 +02:00
committed by Jeff Garzik
parent f1f5a807b0
commit 40c6023031
2 changed files with 5 additions and 0 deletions
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2
drivers/ata/pata_via.c
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@@ -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)