From: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
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@xxxxxxxxx>
Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Acked-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
Signed-off-by: Wolfram Sang <wsa@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/i2c/i2c-core-acpi.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
--- 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
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,
