ide-cd: add missing 'ireason' masking to cdrom_write_intr()

Mask 'ireason' variable with 0x3 so the valid interrupt reason value
is passed to cdrom_write_check_ireason() for checking.

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

diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index d4b298e..30f2758 100644 (file)
--- 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);