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regulator: core: fix debugfs creation regression

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commit 2a4b49bb58 upstream.

regulator_get() may sometimes be called more than once for the same
consumer device, something which before commit dbe954d8f1 ("regulator:
core: Avoid debugfs: Directory ...  already present! error") resulted in
errors being logged.

A couple of recent commits broke the handling of such cases so that
attributes are now erroneously created in the debugfs root directory the
second time a regulator is requested and the log is filled with errors
like:

	debugfs: File 'uA_load' in directory '/' already present!
	debugfs: File 'min_uV' in directory '/' already present!
	debugfs: File 'max_uV' in directory '/' already present!
	debugfs: File 'constraint_flags' in directory '/' already present!

on any further calls.

Fixes: 2715bb11cf ("regulator: core: Fix more error checking for debugfs_create_dir()")
Fixes: 08880713ce ("regulator: core: Streamline debugfs operations")
Cc: stable@vger.kernel.org
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20240509133304.8883-1-johan+linaro@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2024-05-09 15:33:04 +02:00 committed by Greg Kroah-Hartman
parent 6a607d1baf
commit ebed91287c
1 changed files with 16 additions and 11 deletions
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9
drivers/regulator/core.c
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@ -1911,11 +1911,15 @@ static struct regulator *create_regulator(struct regulator_dev *rdev,
}
}
if (err != -EEXIST)
if (err != -EEXIST) {
regulator->debugfs = debugfs_create_dir(supply_name, rdev->debugfs);
if (IS_ERR(regulator->debugfs))
if (IS_ERR(regulator->debugfs)) {
rdev_dbg(rdev, "Failed to create debugfs directory\n");
regulator->debugfs = NULL;
}
}
if (regulator->debugfs) {
debugfs_create_u32("uA_load", 0444, regulator->debugfs,
&regulator->uA_load);
debugfs_create_u32("min_uV", 0444, regulator->debugfs,
@ -1924,6 +1928,7 @@ static struct regulator *create_regulator(struct regulator_dev *rdev,
&regulator->voltage[PM_SUSPEND_ON].max_uV);
debugfs_create_file("constraint_flags", 0444, regulator->debugfs,
regulator, &constraint_flags_fops);
}
/*
* Check now if the regulator is an always on regulator - if