[MTD] NAND: Select chip before checking write protect status

The other way round works not really well with boards which have a
static NAND chipselect.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

drivers/mtd/nand/nand_base.c

@@ -1610,13 +1610,13 @@ static int nand_do_write_ops(struct mtd_info *mtd, loff_t to,
 	if (!writelen)
 		return 0;
 
+	chipnr = (int)(to >> chip->chip_shift);
+	chip->select_chip(mtd, chipnr);
+
 	/* Check, if it is write protected */
 	if (nand_check_wp(mtd))
 		return -EIO;
 
-	chipnr = (int)(to >> chip->chip_shift);
-	chip->select_chip(mtd, chipnr);
-
 	realpage = (int)(to >> chip->page_shift);
 	page = realpage & chip->pagemask;
 	blockmask = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1;