Return -ENOTSUPP if bitlen cannot be handled by the controller during xfer.

This fixes board reset when sspi command is hit with no arguments where bitlen is passed as 0.

Signed-off-by: Lad Prabhakar prabhakar.mahadev-lad.rj@bp.renesas.com Reviewed-by: Biju Das biju.das.jz@bp.renesas.com --- drivers/spi/renesas_rpc_spi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/renesas_rpc_spi.c b/drivers/spi/renesas_rpc_spi.c index 9d9e767d87..c2ff5b157c 100644 --- a/drivers/spi/renesas_rpc_spi.c +++ b/drivers/spi/renesas_rpc_spi.c @@ -252,7 +252,7 @@ static int rpc_spi_xfer(struct udevice *dev, unsigned int bitlen,

if (!priv->cmdstarted) { if (!wlen || rlen) - BUG(); + return -ENOTSUPP;

memcpy(priv->cmdcopy, dout, wlen); priv->cmdlen = wlen;