1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/ide/ppc/pmac.c b/drivers/ide/ppc/pmac.c
index 7c3a84f8fbed..a0d66480a797 100644
--- a/drivers/ide/ppc/pmac.c
+++ b/drivers/ide/ppc/pmac.c
@@ -502,6 +502,22 @@ static void pmac_exec_command(ide_hwif_t *hwif, u8 cmd)
                                      + IDE_TIMING_CONFIG));
 }
 
+static void pmac_set_irq(ide_hwif_t *hwif, int on)
+{
+        u8 ctl = ATA_DEVCTL_OBS;
+
+        if (on == 4) { /* hack for SRST */
+                ctl |= 4;
+                on &= ~4;
+        }
+
+        ctl |= on ? 0 : 2;
+
+        writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr);
+        (void)readl((void __iomem *)(hwif->io_ports.data_addr
+                                     + IDE_TIMING_CONFIG));
+}
+
 /*
  * Old tuning functions (called on hdparm -p), sets up drive PIO timings
  */
@@ -1100,6 +1116,7 @@ static int __devinit pmac_ide_setup_device(pmac_ide_hwif_t *pmif, hw_regs_t *hw)
                 return -ENOENT;
 
         hwif->exec_command = pmac_exec_command;
+        hwif->set_irq      = pmac_set_irq;
 
         /* Setup MMIO ops */
         default_hwif_mmiops(hwif);