Commit 6ada5c1e authored Apr 16, 2015 by Charles Keepax Committed by Wolfram Sang Apr 23, 2015

i2c: Mark adapter devices with pm_runtime_no_callbacks



Commit 523c5b89 ("i2c: Remove support for legacy PM") removed the PM
ops from the bus type, which causes the pm operations on the s3c2410
adapter device to fail (-ENOSUPP in rpm_callback). The adapter device
doesn't get bound to a driver and as such can't have its own pm_runtime
callbacks. Previously this was fine as the bus callbacks would have been
used, but now this can cause devices which use PM runtime and are
attached over I2C to fail to resume.

This commit fixes this issue by marking all adapter devices with
pm_runtime_no_callbacks, since they can't have any.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Acked-by: Beata Michalska <b.michalska@samsung.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Fixes: 523c5b89
Cc: stable@kernel.org

parent 9ef8a0be

drivers/i2c/i2c-core.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1413,6 +1413,8 @@ static int i2c_register_adapter(struct i2c_adapter *adap)

		dev_dbg(&adap->dev, "adapter [%s] registered\n", adap->name);

		pm_runtime_no_callbacks(&adap->dev);

		#ifdef CONFIG_I2C_COMPAT
		res = class_compat_create_link(i2c_adapter_compat_class, &adap->dev,
		adap->dev.parent);

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