[libata] Improve timeout handling

On a timeout call a device specific handler early in the recovery so that
we can complete and process successful commands which timed out due to IRQ
loss or the like rather more elegantly.

[Revised to exclude the timeout handling on a few devices that inherit from
 SFF but are not SFF enough to use the default timeout handler]

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/ata/sata_vsc.c b/drivers/ata/sata_vsc.c
index ef211f333d7b..ed70bd28fa2c 100644
--- a/drivers/ata/sata_vsc.c
+++ b/drivers/ata/sata_vsc.c
@@ -308,6 +308,9 @@ static struct scsi_host_template vsc_sata_sht = {
 
 static struct ata_port_operations vsc_sata_ops = {
         .inherits               = &ata_bmdma_port_ops,
+        /* The IRQ handling is not quite standard SFF behaviour so we
+           cannot use the default lost interrupt handler */
+        .lost_interrupt         = ATA_OP_NULL,
         .sff_tf_load            = vsc_sata_tf_load,
         .sff_tf_read            = vsc_sata_tf_read,
         .freeze                 = vsc_freeze,