arm: OMAP2+: nandecc: propagate error to command return status

Currently nandecc returns zero even if underlaying
omap_nand_switch_ecc function fails. Fix that by
propagating error returned to command return value.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

arch/arm/include/asm/arch-am33xx/sys_proto.h

@@ -29,7 +29,7 @@ void sdelay(unsigned long);
 void gpmc_init(void);
 void enable_gpmc_cs_config(const u32 *gpmc_config, const struct gpmc_cs *cs, u32 base,
 			u32 size);
-void omap_nand_switch_ecc(uint32_t, uint32_t);
+int omap_nand_switch_ecc(uint32_t, uint32_t);
 
 void set_uart_mux_conf(void);
 void set_mux_conf_regs(void);

arch/arm/include/asm/arch-omap3/sys_proto.h

@@ -68,7 +68,7 @@ u32 wait_on_value(u32, u32, void *, u32);
 void cancel_out(u32 *num, u32 *den, u32 den_limit);
 void sdelay(unsigned long);
 void make_cs1_contiguous(void);
-void omap_nand_switch_ecc(uint32_t, uint32_t);
+int omap_nand_switch_ecc(uint32_t, uint32_t);
 void power_init_r(void);
 void do_omap3_emu_romcode_call(u32 service_id, u32 parameters);
 void omap3_set_aux_cr_secure(u32 acr);

arch/arm/mach-omap2/omap3/board.c

@@ -269,38 +269,34 @@ void abort(void)
  *****************************************************************************/
 static int do_switch_ecc(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
 {
+	int hw, strength = 1;
+
 	if (argc < 2 || argc > 3)
 		goto usage;
 
 	if (strncmp(argv[1], "hw", 2) == 0) {
-		if (argc == 2) {
-			omap_nand_switch_ecc(1, 1);
-		} else {
-			if (strncmp(argv[2], "hamming", 7) == 0)
-				omap_nand_switch_ecc(1, 1);
-			else if (strncmp(argv[2], "bch8", 4) == 0)
-				omap_nand_switch_ecc(1, 8);
+		hw = 1;
+		if (argc == 3) {
+			if (strncmp(argv[2], "bch8", 4) == 0)
+				strength = 8;
 			else if (strncmp(argv[2], "bch16", 5) == 0)
-				omap_nand_switch_ecc(1, 16);
-			else
+				strength = 16;
+			else if (strncmp(argv[2], "hamming", 7) != 0)
 				goto usage;
 		}
 	} else if (strncmp(argv[1], "sw", 2) == 0) {
-		if (argc == 2) {
-			omap_nand_switch_ecc(0, 1);
-		} else {
-			if (strncmp(argv[2], "hamming", 7) == 0)
-				omap_nand_switch_ecc(0, 1);
-			else if (strncmp(argv[2], "bch8", 4) == 0)
-				omap_nand_switch_ecc(0, 8);
-			else
+		hw = 0;
+		if (argc == 3) {
+			if (strncmp(argv[2], "bch8", 4) == 0)
+				strength = 8;
+			else if (strncmp(argv[2], "hamming", 7) != 0)
 				goto usage;
 		}
 	} else {
 		goto usage;
 	}
 
-	return 0;
+	return -omap_nand_switch_ecc(hw, strength);
 
 usage:
 	printf ("Usage: nandecc %s\n", cmdtp->usage);