1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index d4b298eb5ef..30f27585a7d 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -1826,7 +1826,7 @@ static ide_startstop_t cdrom_write_intr(ide_drive_t *drive)
         }
 
         /* Read the interrupt reason and the transfer length. */
-        ireason = HWIF(drive)->INB(IDE_IREASON_REG);
+        ireason = HWIF(drive)->INB(IDE_IREASON_REG) & 0x3;
         lowcyl  = HWIF(drive)->INB(IDE_BCOUNTL_REG);
         highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG);