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[09/10] i2c: slave: print warning if slave flag not set

Message ID 1439066007-13951-10-git-send-email-wsa@the-dreams.de (mailing list archive)
State Accepted
Delegated to: Geert Uytterhoeven
Headers show

Commit Message

Wolfram Sang Aug. 8, 2015, 8:33 p.m. UTC 
From: Wolfram Sang <wsa+renesas@sang-engineering.com>

Address collisions will be rare, but we should let the user know that
slaves have their own address space nonetheless.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
 drivers/i2c/i2c-core.c | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 4c1f31f039964b..4d143fe7c3eab3 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -2980,6 +2980,10 @@  int i2c_slave_register(struct i2c_client *client, i2c_slave_cb_t slave_cb)
 		return -EINVAL;
 	}
 
+	if (!(client->flags & I2C_CLIENT_SLAVE))
+		dev_warn(&client->dev, "%s: client slave flag not set. You might see address collisions\n",
+			 __func__);
+
 	if (!(client->flags & I2C_CLIENT_TEN)) {
 		/* Enforce stricter address checking */
 		ret = i2c_check_7bit_addr_validity_strict(client->addr);