From: Wolfram Sang wsa+renesas@sang-engineering.com
commit 8daee952b4389729358665fb91949460641659d4 upstream.
i2c_verify_client() can fail, so we need to put the device when that happens.
Fixes: 525e6fabeae2 ("i2c / ACPI: add support for ACPI reconfigure notifications") Reported-by: Geert Uytterhoeven geert+renesas@glider.be Signed-off-by: Wolfram Sang wsa+renesas@sang-engineering.com Reviewed-by: Geert Uytterhoeven geert+renesas@glider.be Reviewed-by: Andy Shevchenko andriy.shevchenko@linux.intel.com Acked-by: Mika Westerberg mika.westerberg@linux.intel.com Signed-off-by: Wolfram Sang wsa@the-dreams.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- drivers/i2c/i2c-core-acpi.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/i2c/i2c-core-acpi.c b/drivers/i2c/i2c-core-acpi.c index 559c3b1..eb05693 100644 --- a/drivers/i2c/i2c-core-acpi.c +++ b/drivers/i2c/i2c-core-acpi.c @@ -352,10 +352,18 @@ static struct i2c_adapter *i2c_acpi_find_adapter_by_handle(acpi_handle handle) static struct i2c_client *i2c_acpi_find_client_by_adev(struct acpi_device *adev) { struct device *dev; + struct i2c_client *client;
dev = bus_find_device(&i2c_bus_type, NULL, adev, i2c_acpi_find_match_device); - return dev ? i2c_verify_client(dev) : NULL; + if (!dev) + return NULL; + + client = i2c_verify_client(dev); + if (!client) + put_device(dev); + + return client; }
static int i2c_acpi_notify(struct notifier_block *nb, unsigned long value,