1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/ide/ide-io-std.c b/drivers/ide/ide-io-std.c
index 7f77bb7db488..9cac281d82c4 100644
--- a/drivers/ide/ide-io-std.c
+++ b/drivers/ide/ide-io-std.c
@@ -73,6 +73,18 @@ void ide_write_devctl(ide_hwif_t *hwif, u8 ctl)
 }
 EXPORT_SYMBOL_GPL(ide_write_devctl);
 
+void ide_dev_select(ide_drive_t *drive)
+{
+        ide_hwif_t *hwif = drive->hwif;
+        u8 select = drive->select | ATA_DEVICE_OBS;
+
+        if (hwif->host_flags & IDE_HFLAG_MMIO)
+                writeb(select, (void __iomem *)hwif->io_ports.device_addr);
+        else
+                outb(select, hwif->io_ports.device_addr);
+}
+EXPORT_SYMBOL_GPL(ide_dev_select);
+
 void ide_tf_load(ide_drive_t *drive, struct ide_cmd *cmd)
 {
         ide_hwif_t *hwif = drive->hwif;
@@ -280,6 +292,7 @@ const struct ide_tp_ops default_tp_ops = {
         .read_altstatus         = ide_read_altstatus,
         .write_devctl           = ide_write_devctl,
 
+        .dev_select             = ide_dev_select,
         .tf_load                = ide_tf_load,
         .tf_read                = ide_tf_read,