1 files changed, 23 insertions, 0 deletions

diff --git a/drivers/ata/pata_pdc202xx_old.c b/drivers/ata/pata_pdc202xx_old.c
index c39f213e1bbc..c2ed5868dda6 100644
--- a/drivers/ata/pata_pdc202xx_old.c
+++ b/drivers/ata/pata_pdc202xx_old.c
@@ -44,6 +44,27 @@ static void pdc202xx_exec_command(struct ata_port *ap,
         ndelay(400);
 }
 
+static bool pdc202xx_irq_check(struct ata_port *ap)
+{
+        struct pci_dev *pdev    = to_pci_dev(ap->host->dev);
+        unsigned long master    = pci_resource_start(pdev, 4);
+        u8 sc1d                 = inb(master + 0x1d);
+
+        if (ap->port_no) {
+                /*
+                 * bit 7: error, bit 6: interrupting,
+                 * bit 5: FIFO full, bit 4: FIFO empty
+                 */
+                return sc1d & 0x40;
+        } else  {
+                /*
+                 * bit 3: error, bit 2: interrupting,
+                 * bit 1: FIFO full, bit 0: FIFO empty
+                 */
+                return sc1d & 0x04;
+        }
+}
+
 /**
  *      pdc202xx_configure_piomode      -       set chip PIO timing
  *      @ap: ATA interface
@@ -282,6 +303,7 @@ static struct ata_port_operations pdc2024x_port_ops = {
         .set_dmamode            = pdc202xx_set_dmamode,
 
         .sff_exec_command       = pdc202xx_exec_command,
+        .sff_irq_check          = pdc202xx_irq_check,
 };
 
 static struct ata_port_operations pdc2026x_port_ops = {
@@ -297,6 +319,7 @@ static struct ata_port_operations pdc2026x_port_ops = {
         .port_start             = pdc2026x_port_start,
 
         .sff_exec_command       = pdc202xx_exec_command,
+        .sff_irq_check          = pdc202xx_irq_check,
 };
 
 static int pdc202xx_init_one(struct pci_dev *dev, const struct pci_device_id *id)