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[05/10] i2c: make address check indpendent from client struct

Message ID 1439066007-13951-6-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>

We want to use this function with struct boardinfo soon, so let's just
pass the parameters really needed. We also extend the type of addr, so
more types can be input. Remove a superfluous dangling comment while
here.

Tested-by: Andrey Danin <danindrey@mail.ru>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
 drivers/i2c/i2c-core.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)
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Patch

diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 28766b7208bcc2..4a83d39a5aabe2 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -796,15 +796,15 @@  static unsigned short i2c_encode_flags_to_addr(struct i2c_client *client)
 
 /* This is a permissive address validity check, I2C address map constraints
  * are purposely not enforced, except for the general call address. */
-static int i2c_check_addr_validity(const struct i2c_client *client)
+static int i2c_check_addr_validity(unsigned addr, unsigned short flags)
 {
-	if (client->flags & I2C_CLIENT_TEN) {
+	if (flags & I2C_CLIENT_TEN) {
 		/* 10-bit address, all values are valid */
-		if (client->addr > 0x3ff)
+		if (addr > 0x3ff)
 			return -EINVAL;
 	} else {
 		/* 7-bit address, reject the general call address */
-		if (client->addr == 0x00 || client->addr > 0x7f)
+		if (addr == 0x00 || addr > 0x7f)
 			return -EINVAL;
 	}
 	return 0;
@@ -982,8 +982,7 @@  i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info)
 
 	strlcpy(client->name, info->type, sizeof(client->name));
 
-	/* Check for address validity */
-	status = i2c_check_addr_validity(client);
+	status = i2c_check_addr_validity(client->addr, client->flags);
 	if (status) {
 		dev_err(&adap->dev, "Invalid %d-bit I2C address 0x%02hx\n",
 			client->flags & I2C_CLIENT_TEN ? 10 : 7, client->addr);