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-rw-r--r--drivers/ide/ide-cd.c2
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);