[PATCH] fpga: machxo2-spi: Fix missing error code in machxo2_write_complete()

[Jiapeng Chong <jiapeng.chong@xxxxxxxxxxxxxxxxx>]

The error code is missing in this code scenario, add the error code
'-EINVAL' to the return value 'ret'.

Eliminate the follow smatch warning:

drivers/fpga/machxo2-spi.c:341 machxo2_write_complete() warn: missing
error code 'ret'.

Reported-by: Abaci Robot <abaci@xxxxxxxxxxxxxxxxx>
Fixes: 88fb3a002330 ("fpga: lattice machxo2: Add Lattice MachXO2
support")
Signed-off-by: Jiapeng Chong <jiapeng.chong@xxxxxxxxxxxxxxxxx>
---
 drivers/fpga/machxo2-spi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/fpga/machxo2-spi.c b/drivers/fpga/machxo2-spi.c
index b4a530a..ea2ec3c 100644
--- a/drivers/fpga/machxo2-spi.c
+++ b/drivers/fpga/machxo2-spi.c
@@ -338,6 +338,7 @@ static int machxo2_write_complete(struct fpga_manager *mgr,
 			break;
 		if (++refreshloop == MACHXO2_MAX_REFRESH_LOOP) {
 			machxo2_cleanup(mgr);
+			ret = -EINVAL;
 			goto fail;
 		}
 	} while (1);
-- 
1.8.3.1