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| author | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2015-07-17 15:48:56 +0300 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2015-08-24 15:05:14 +0300 |
| commit | 9bccc70a127cfe2a13e34d6b6e7300caae113f8f (patch) | |
| tree | da17b6a3de9f47c5affd0b685b69524a67fd03f6 /drivers/i2c | |
| parent | b4e2f6ac1281cd3e066919cc762eef4924e9fcc5 (diff) | |
| download | linux-9bccc70a127cfe2a13e34d6b6e7300caae113f8f.tar.xz | |
i2c: take address space into account when checking for used addresses
It is not enough to compare the plain address value, we also need to
check the flags enabling a different address space. E.g. it is valid to
have address 0x50 as a 7-bit address and 0x050 as 10-bit address on the
same bus. Same for addresses when we are the slave.
Tested-by: Andrey Danin <danindrey@mail.ru>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/i2c-core.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index 7b18f31bf6c6..fc6d89316144 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -839,7 +839,7 @@ static int __i2c_check_addr_busy(struct device *dev, void *addrp) struct i2c_client *client = i2c_verify_client(dev); int addr = *(int *)addrp; - if (client && client->addr == addr) + if (client && i2c_encode_flags_to_addr(client) == addr) return -EBUSY; return 0; } @@ -993,7 +993,7 @@ i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info) } /* Check for address business */ - status = i2c_check_addr_busy(adap, client->addr); + status = i2c_check_addr_busy(adap, i2c_encode_flags_to_addr(client)); if (status) goto out_err; @@ -2315,7 +2315,7 @@ static int i2c_detect_address(struct i2c_client *temp_client, return err; } - /* Skip if already in use */ + /* Skip if already in use (7 bit, no need to encode flags) */ if (i2c_check_addr_busy(adapter, addr)) return 0; @@ -2431,7 +2431,7 @@ i2c_new_probed_device(struct i2c_adapter *adap, continue; } - /* Check address availability */ + /* Check address availability (7 bit, no need to encode flags) */ if (i2c_check_addr_busy(adap, addr_list[i])) { dev_dbg(&adap->dev, "Address 0x%02x already in " "use, not probing\n", addr_list[i]); |