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

PATCH In review Bartlomiej Zolnierkiewicz 2 participants 2 messages Dec 20, 2007 – Dec 21, 2007 libata

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Bartlomiej Zolnierkiewicz

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PATCH 5/63 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.

Signed-off-by Bartlomiej Zolnierkiewicz <[email protected]>
---
 drivers/ide/ide-cd.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
drivers/ide/ide-cd.c +1 -1
Index: b/drivers/ide/ide-cd.c
===================================================================
@@ -1820,7 +1820,7 @@ static ide_startstop_t cdrom_write_intr(
 	}
 
 	/* 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);