i2c: Remove redundant comparison in npcm_i2c_reg_slave

In the npcm_i2c_reg_slave() function, there was a redundant
comparison that checked if 'bus->slave' was null immediately after
assigning it the 'client' value. There were concerns about a
potential null dereference because of `client->adapter`, but
according to Wolfram Sang, "we trusted ourselves here" Therefore,
this comparison is unnecessary.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Signed-off-by: Rand Deeb <rand.sec96@gmail.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>

diff --git a/drivers/i2c/busses/i2c-npcm7xx.c b/drivers/i2c/busses/i2c-npcm7xx.c
index 54181b3f1919625a83010efbb7b439f8fd2316b7..2fe68615942efeb3b3b6d8df28ac53a1a38d4136 100644 (file)
--- a/drivers/i2c/busses/i2c-npcm7xx.c
+++ b/drivers/i2c/busses/i2c-npcm7xx.c
@@ -1264,9 +1264,6 @@ static int npcm_i2c_reg_slave(struct i2c_client *client)
 
        bus->slave = client;
 
-       if (!bus->slave)
-               return -EINVAL;
-
        if (client->flags & I2C_CLIENT_TEN)
                return -EAFNOSUPPORT;