libata-sff: kill unused ata_bus_reset()

... since I see no callers of it.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

3 files changed, 2 insertions, 99 deletions

diff --git a/Documentation/DocBook/libata.tmpl b/Documentation/DocBook/libata.tmpl
index ff3e5bec1c24..70b811e9f2ca 100644
--- a/Documentation/DocBook/libata.tmpl
+++ b/Documentation/DocBook/libata.tmpl
@@ -81,16 +81,14 @@ void (*port_disable) (struct ata_port *);
         </programlisting>
 
         <para>
-        Called from ata_bus_probe() and ata_bus_reset() error paths,
-        as well as when unregistering from the SCSI module (rmmod, hot
-        unplug).
+        Called from ata_bus_probe() error path, as well as when
+        unregistering from the SCSI module (rmmod, hot unplug).
         This function should do whatever needs to be done to take the
         port out of use.  In most cases, ata_port_disable() can be used
         as this hook.
         </para>
         <para>
         Called from ata_bus_probe() on a failed probe.
-        Called from ata_bus_reset() on a failed bus reset.
         Called from ata_scsi_release().
         </para>
 
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index e3877b6843c9..b31389605bee 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -2631,100 +2631,6 @@ u8 ata_bmdma_status(struct ata_port *ap)
 }
 EXPORT_SYMBOL_GPL(ata_bmdma_status);
 
-/**
- *      ata_bus_reset - reset host port and associated ATA channel
- *      @ap: port to reset
- *
- *      This is typically the first time we actually start issuing
- *      commands to the ATA channel.  We wait for BSY to clear, then
- *      issue EXECUTE DEVICE DIAGNOSTIC command, polling for its
- *      result.  Determine what devices, if any, are on the channel
- *      by looking at the device 0/1 error register.  Look at the signature
- *      stored in each device's taskfile registers, to determine if
- *      the device is ATA or ATAPI.
- *
- *      LOCKING:
- *      PCI/etc. bus probe sem.
- *      Obtains host lock.
- *
- *      SIDE EFFECTS:
- *      Sets ATA_FLAG_DISABLED if bus reset fails.
- *
- *      DEPRECATED:
- *      This function is only for drivers which still use old EH and
- *      will be removed soon.
- */
-void ata_bus_reset(struct ata_port *ap)
-{
-        struct ata_device *device = ap->link.device;
-        struct ata_ioports *ioaddr = &ap->ioaddr;
-        unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
-        u8 err;
-        unsigned int dev0, dev1 = 0, devmask = 0;
-        int rc;
-
-        DPRINTK("ENTER, host %u, port %u\n", ap->print_id, ap->port_no);
-
-        /* determine if device 0/1 are present */
-        if (ap->flags & ATA_FLAG_SATA_RESET)
-                dev0 = 1;
-        else {
-                dev0 = ata_devchk(ap, 0);
-                if (slave_possible)
-                        dev1 = ata_devchk(ap, 1);
-        }
-
-        if (dev0)
-                devmask |= (1 << 0);
-        if (dev1)
-                devmask |= (1 << 1);
-
-        /* select device 0 again */
-        ap->ops->sff_dev_select(ap, 0);
-
-        /* issue bus reset */
-        if (ap->flags & ATA_FLAG_SRST) {
-                rc = ata_bus_softreset(ap, devmask,
-                                       ata_deadline(jiffies, 40000));
-                if (rc && rc != -ENODEV)
-                        goto err_out;
-        }
-
-        /*
-         * determine by signature whether we have ATA or ATAPI devices
-         */
-        device[0].class = ata_sff_dev_classify(&device[0], dev0, &err);
-        if ((slave_possible) && (err != 0x81))
-                device[1].class = ata_sff_dev_classify(&device[1], dev1, &err);
-
-        /* is double-select really necessary? */
-        if (device[1].class != ATA_DEV_NONE)
-                ap->ops->sff_dev_select(ap, 1);
-        if (device[0].class != ATA_DEV_NONE)
-                ap->ops->sff_dev_select(ap, 0);
-
-        /* if no devices were detected, disable this port */
-        if ((device[0].class == ATA_DEV_NONE) &&
-            (device[1].class == ATA_DEV_NONE))
-                goto err_out;
-
-        if (ap->flags & (ATA_FLAG_SATA_RESET | ATA_FLAG_SRST)) {
-                /* set up device control for ATA_FLAG_SATA_RESET */
-                iowrite8(ap->ctl, ioaddr->ctl_addr);
-                ap->last_ctl = ap->ctl;
-        }
-
-        DPRINTK("EXIT\n");
-        return;
-
-err_out:
-        ata_port_printk(ap, KERN_ERR, "disabling port\n");
-        ata_port_disable(ap);
-
-        DPRINTK("EXIT\n");
-}
-EXPORT_SYMBOL_GPL(ata_bus_reset);
-
 #ifdef CONFIG_PCI
 
 /**
diff --git a/include/linux/libata.h b/include/linux/libata.h
index b2f2003b92e5..4fa748e9bc01 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -1631,7 +1631,6 @@ extern void ata_bmdma_setup(struct ata_queued_cmd *qc);
 extern void ata_bmdma_start(struct ata_queued_cmd *qc);
 extern void ata_bmdma_stop(struct ata_queued_cmd *qc);
 extern u8 ata_bmdma_status(struct ata_port *ap);
-extern void ata_bus_reset(struct ata_port *ap);
 
 #ifdef CONFIG_PCI
 extern int ata_pci_bmdma_clear_simplex(struct pci_dev *pdev);