sl82c105: implement test_irq() method

Implement test_irq() method.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/ide/sl82c105.c b/drivers/ide/sl82c105.c
index 88ac47085cd9..6246bea585c4 100644
--- a/drivers/ide/sl82c105.c
+++ b/drivers/ide/sl82c105.c
@@ -114,6 +114,16 @@ static void sl82c105_set_dma_mode(ide_drive_t *drive, const u8 speed)
         drive->drive_data |= (unsigned long)drv_ctrl << 16;
 }
 
+static int sl82c105_test_irq(ide_hwif_t *hwif)
+{
+        struct pci_dev *dev     = to_pci_dev(hwif->dev);
+        u32 val, mask           = hwif->channel ? CTRL_IDE_IRQB : CTRL_IDE_IRQA;
+
+        pci_read_config_dword(dev, 0x40, &val);
+
+        return (val & mask) ? 1 : 0;
+}
+
 /*
  * The SL82C105 holds off all IDE interrupts while in DMA mode until
  * all DMA activity is completed.  Sometimes this causes problems (eg,
@@ -288,6 +298,7 @@ static const struct ide_port_ops sl82c105_port_ops = {
         .set_pio_mode           = sl82c105_set_pio_mode,
         .set_dma_mode           = sl82c105_set_dma_mode,
         .resetproc              = sl82c105_resetproc,
+        .test_irq               = sl82c105_test_irq,
 };
 
 static const struct ide_dma_ops sl82c105_dma_ops = {