ide: Fix an overrun found in the CS5535 IDE driver

As found by the Coverity checker, and reported by Adrian Bunk, this
fixes a overrun error in the CS5535 IDE driver.  Somebody got a little
excited with the if() statement - the CS5535 only supports UDMA 0-4.

Bart:
Not a bug per se since the upper layer will never feed this function
with speed > XFER_UDMA_4 (thanks to ->ultra_mask being set to 0x1f).

Worth fixing anyway.

Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>
Cc: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

diff --git a/drivers/ide/pci/cs5535.c b/drivers/ide/pci/cs5535.c
index ce44e38..9bd526d 100644 (file)
--- a/drivers/ide/pci/cs5535.c
+++ b/drivers/ide/pci/cs5535.c
@@ -116,7 +116,7 @@ static void cs5535_set_speed(ide_drive_t *drive, u8 speed)
 
                reg &= 0x80000000UL;  /* Preserve the PIO format bit */
 
-               if (speed >= XFER_UDMA_0 && speed <= XFER_UDMA_7)
+               if (speed >= XFER_UDMA_0 && speed <= XFER_UDMA_4)
                        reg |= cs5535_udma_timings[speed - XFER_UDMA_0];
                else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2)
                        reg |= cs5535_mwdma_timings[speed - XFER_MW_DMA_0];