MTD: nandsim: suppress unnecessary warning

nand_base sometimes reads only 2 bytes of a 4 byte id.
It is OK.  Do not print a warning in that case.

Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/nand/nandsim.c

@@ -1736,6 +1736,9 @@ static void ns_nand_write_byte(struct mtd_info *mtd, u_char byte)
 
 		/* Check if chip is expecting command */
 		if (NS_STATE(ns->nxstate) != STATE_UNKNOWN && !(ns->nxstate & STATE_CMD_MASK)) {
+			/* Do not warn if only 2 id bytes are read */
+			if (!(ns->regs.command == NAND_CMD_READID &&
+			    NS_STATE(ns->state) == STATE_DATAOUT_ID && ns->regs.count == 2)) {
 				/*
 				 * We are in situation when something else (not command)
 				 * was expected but command was input. In this case ignore
@@ -1743,6 +1746,7 @@ static void ns_nand_write_byte(struct mtd_info *mtd, u_char byte)
 				 */
 				NS_WARN("write_byte: command (%#x) wasn't expected, expected state is %s, "
 					"ignore previous states\n", (uint)byte, get_state_name(ns->nxstate));
+			}
 			switch_to_ready_state(ns, NS_STATUS_FAILED(ns));
 		}