From 1b1be3bf27b62f5abcf85c6f3214bdb9c7526685 Mon Sep 17 00:00:00 2001
From: Wolfram Sang <wsa+renesas@sang-engineering.com>
Date: Sat, 25 Jul 2020 21:50:52 +0200
Subject: [PATCH] i2c: slave: improve sanity check when registering
Git-commit: 1b1be3bf27b62f5abcf85c6f3214bdb9c7526685
Patch-mainline: v5.8
References: git-fixes
Add check for ERR_PTR and simplify code while here.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Alain Volmat <alain.volmat@st.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/i2c/i2c-core-slave.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/drivers/i2c/i2c-core-slave.c b/drivers/i2c/i2c-core-slave.c
index 5427f047faf0..549751347e6c 100644
--- a/drivers/i2c/i2c-core-slave.c
+++ b/drivers/i2c/i2c-core-slave.c
@@ -18,10 +18,8 @@ int i2c_slave_register(struct i2c_client *client, i2c_slave_cb_t slave_cb)
{
int ret;
- if (!client || !slave_cb) {
- WARN(1, "insufficient data\n");
+ if (WARN(IS_ERR_OR_NULL(client) || !slave_cb, "insufficient data\n"))
return -EINVAL;
- }
if (!(client->flags & I2C_CLIENT_SLAVE))
dev_warn(&client->dev, "%s: client slave flag not set. You might see address collisions\n",
--
2.16.4