1 files changed, 19 insertions, 0 deletions

diff --git a/drivers/ide/pci/scc_pata.c b/drivers/ide/pci/scc_pata.c
index a89dc478078..727eda6db76 100644
--- a/drivers/ide/pci/scc_pata.c
+++ b/drivers/ide/pci/scc_pata.c
@@ -149,6 +149,23 @@ static u8 scc_read_sff_dma_status(ide_hwif_t *hwif)
         return (u8)in_be32((void *)(hwif->dma_base + 4));
 }
 
+static void scc_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;
+
+        out_be32((void *)hwif->io_ports.ctl_addr, ctl);
+        eieio();
+        in_be32((void *)(hwif->dma_base + 0x01c));
+        eieio();
+}
+
 static void scc_ide_insw(unsigned long port, void *addr, u32 count)
 {
         u16 *ptr = (u16 *)addr;
@@ -802,6 +819,8 @@ static void __devinit init_mmio_iops_scc(ide_hwif_t *hwif)
         hwif->read_altstatus      = scc_read_altstatus;
         hwif->read_sff_dma_status = scc_read_sff_dma_status;
 
+        hwif->set_irq = scc_set_irq;
+
         hwif->tf_load = scc_tf_load;
         hwif->tf_read = scc_tf_read;