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

[ Upstream commit a1e4470823d99e75b596748086e120dea169ed3c ]

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'.

[mdf@kernel.org: Reworded commit message]
Fixes: 88fb3a002330 ("fpga: lattice machxo2: Add Lattice MachXO2 support")
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: Moritz Fischer <mdf@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/fpga/machxo2-spi.c b/drivers/fpga/machxo2-spi.c
index 7688ff3b31e4c81e969d55958ee531103f5d66b8..9eef18349eee66b9c3aae03ea08018c844e96440 100644 (file)
--- 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);