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| author | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2019-04-25 17:19:48 +0300 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2019-05-03 17:44:51 +0300 |
| commit | 5d756112da49af8798620fc788ff4c730c7d5574 (patch) | |
| tree | 2b417de7894cf5cfee07a5faf601f895a4a4db05 /drivers/i2c/i2c-core.h | |
| parent | 4db61c2a16fce2ef85d82751de4ba43a39347cfb (diff) | |
| download | linux-5d756112da49af8798620fc788ff4c730c7d5574.tar.xz | |
i2c: core: apply 'is_suspended' check for SMBus, too
We checked I2C calls, but not SMBus. Refactor the helper to an inline
function and use it for both, I2C and SMBus.
Fixes: 9ac6cb5fbb17 ("i2c: add suspended flag and accessors for i2c adapters")
Reported-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c/i2c-core.h')
| -rw-r--r-- | drivers/i2c/i2c-core.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/i2c/i2c-core.h b/drivers/i2c/i2c-core.h index f9d0c417b5a5..c88cfef81343 100644 --- a/drivers/i2c/i2c-core.h +++ b/drivers/i2c/i2c-core.h @@ -54,6 +54,17 @@ static inline int __i2c_lock_bus_helper(struct i2c_adapter *adap) return ret; } +static inline int __i2c_check_suspended(struct i2c_adapter *adap) +{ + if (test_bit(I2C_ALF_IS_SUSPENDED, &adap->locked_flags)) { + if (!test_and_set_bit(I2C_ALF_SUSPEND_REPORTED, &adap->locked_flags)) + dev_WARN(&adap->dev, "Transfer while suspended\n"); + return -ESHUTDOWN; + } + + return 0; +} + #ifdef CONFIG_ACPI const struct acpi_device_id * i2c_acpi_match_device(const struct acpi_device_id *matches, |