[PATCH net-next] net: ethernet: renesas: rswitch: Fix signedness bug in rswitch_etha_wait_link_verification()

[YueHaibing]

rswitch_reg_wait() may return negative value, which converts to true later.
However rswitch_etha_hw_init() only check it less than zero.

Fixes: 3590918b5d07 ("net: ethernet: renesas: Add support for "Ethernet Switch"")
Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
---
 drivers/net/ethernet/renesas/rswitch.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/renesas/rswitch.c b/drivers/net/ethernet/renesas/rswitch.c
index f3d27aef1286..c098b27093ea 100644
--- a/drivers/net/ethernet/renesas/rswitch.c
+++ b/drivers/net/ethernet/renesas/rswitch.c
@@ -920,7 +920,7 @@ static void rswitch_etha_write_mac_address(struct rswitch_etha *etha, const u8 *
 		  etha->addr + MRMAC1);
 }
 
-static bool rswitch_etha_wait_link_verification(struct rswitch_etha *etha)
+static int rswitch_etha_wait_link_verification(struct rswitch_etha *etha)
 {
 	iowrite32(MLVC_PLV, etha->addr + MLVC);
 
-- 
2.20.1