mtd: rawnand: silence static checker warning in nand_setup_interface()

Smatch complains that the error code is not set on this error path:

    drivers/mtd/nand/raw/nand_base.c:842 nand_setup_interface()
    warn: missing error code 'ret'

But actually returning success is intentional because the NAND chip will
still work in mode 0.  This patch adds a "ret = 0;" assignment to make
the intent more clear and to silence the static checker warning.  It
doesn't affect the compiled code because GCC optimises the assignment
away.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/YH6Ugwz3gcga+q8X@mwanda

diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index fb072c4..e29e5b3 100644 (file)
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -880,6 +880,7 @@ static int nand_setup_interface(struct nand_chip *chip, int chipnr)
        if (tmode_param[0] != chip->best_interface_config->timings.mode) {
                pr_warn("timing mode %d not acknowledged by the NAND chip\n",
                        chip->best_interface_config->timings.mode);
+               ret = 0;
                goto err_reset_chip;
        }