i2c: muxes: i2c-mux-gpmux: Use of_get_i2c_adapter_by_node()

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i2c-mux-gpmux uses the pair of_find_i2c_adapter_by_node() /
i2c_put_adapter(). These pair alone is not correct to properly lock the
I2C parent adapter.

Indeed, i2c_put_adapter() decrements the module refcount while
of_find_i2c_adapter_by_node() does not increment it. This leads to an
underflow of the parent module refcount.

Use the dedicated function, of_get_i2c_adapter_by_node(), to handle
correctly the module refcount.

Fixes: ac8498f0ce ("i2c: i2c-mux-gpmux: new driver")
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Cc: stable@vger.kernel.org
Acked-by: Peter Rosin <peda@axentia.se>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>

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Herve Codina 2023-10-20 17:30:13 +02:00 • committed by Wolfram Sang

parent 0fb118de50

commit 3dc0ec46f6

1 changed files with 1 additions and 1 deletions

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drivers/i2c/muxes/i2c-mux-gpmux.c

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