Signed-off-by: Alan Cox <[email protected]>
diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.18-mm2/drivers/ata/libata-core.c linux-2.6.18-mm2/drivers/ata/libata-core.c
--- linux.vanilla-2.6.18-mm2/drivers/ata/libata-core.c 2006-09-28 14:33:46.000000000 +0100
+++ linux-2.6.18-mm2/drivers/ata/libata-core.c 2006-09-29 17:33:53.000000000 +0100
@@ -870,7 +870,11 @@
* the PIO timing number for the maximum. Turn it into
* a mask.
*/
- pio_mask = (2 << (id[ATA_ID_OLD_PIO_MODES] & 0xFF)) - 1 ;
+ u8 mode = id[ATA_ID_OLD_PIO_MODES] & 0xFF;
+ if( mode < 5) /* Valid PIO range */
+ pio_mask = (2 << mode) - 1 ;
+ else
+ pio_mask = 1;
/* But wait.. there's more. Design your standards by
* committee and you too can get a free iordy field to
-
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