[2.6 patch] pata_cs5536.c: fix array overrun

This patch fixes an obvious array overrun spotted by the Coverity 
checker.

Signed-off-by: Adrian Bunk <[email protected]>

---
9101f2e2691094244bd147a05225f6c84bdf7404 
diff --git a/drivers/ata/pata_cs5536.c b/drivers/ata/pata_cs5536.c
index 53070f6..00039a1 100644
--- a/drivers/ata/pata_cs5536.c
+++ b/drivers/ata/pata_cs5536.c
@@ -214,7 +214,7 @@ static void cs5536_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 		cs5536_read(pdev, DTC, &dtc);
 
 		dtc &= ~(IDE_DRV_MASK << dshift);
-		dtc |= mwdma_timings[mode] << dshift;
+		dtc |= mwdma_timings[mode - XFER_MW_DMA_0] << dshift;
 
 		cs5536_write(pdev, DTC, dtc);
 	}

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