5.4-stable review patch. If anyone has any objections, please let me know.
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From: Hans de Goede hdegoede@redhat.com
[ Upstream commit b1b9f7a494400c0c39f8cd83de3aaa6111c55087 ]
The lis3lv02d_i2c driver was missing a line to set the lis3_dev's reg_ctrl callback.
lis3_reg_ctrl(on) is called from the init callback, but due to the missing reg_ctrl callback the regulators where never turned off again leading to the following oops/backtrace when detaching the driver:
[ 82.313527] ------------[ cut here ]------------ [ 82.313546] WARNING: CPU: 1 PID: 1724 at drivers/regulator/core.c:2396 _regulator_put+0x219/0x230 ... [ 82.313695] RIP: 0010:_regulator_put+0x219/0x230 ... [ 82.314767] Call Trace: [ 82.314770] <TASK> [ 82.314772] ? _regulator_put+0x219/0x230 [ 82.314777] ? __warn+0x81/0x170 [ 82.314784] ? _regulator_put+0x219/0x230 [ 82.314791] ? report_bug+0x18d/0x1c0 [ 82.314801] ? handle_bug+0x3c/0x80 [ 82.314806] ? exc_invalid_op+0x13/0x60 [ 82.314812] ? asm_exc_invalid_op+0x16/0x20 [ 82.314845] ? _regulator_put+0x219/0x230 [ 82.314857] regulator_bulk_free+0x39/0x60 [ 82.314865] i2c_device_remove+0x22/0xb0
Add the missing setting of the callback so that the regulators properly get turned off again when not used.
Signed-off-by: Hans de Goede hdegoede@redhat.com Link: https://lore.kernel.org/r/20231224183402.95640-1-hdegoede@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/misc/lis3lv02d/lis3lv02d_i2c.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/misc/lis3lv02d/lis3lv02d_i2c.c b/drivers/misc/lis3lv02d/lis3lv02d_i2c.c index 52555d2e824b..ab1db760ba4e 100644 --- a/drivers/misc/lis3lv02d/lis3lv02d_i2c.c +++ b/drivers/misc/lis3lv02d/lis3lv02d_i2c.c @@ -151,6 +151,7 @@ static int lis3lv02d_i2c_probe(struct i2c_client *client, lis3_dev.init = lis3_i2c_init; lis3_dev.read = lis3_i2c_read; lis3_dev.write = lis3_i2c_write; + lis3_dev.reg_ctrl = lis3_reg_ctrl; lis3_dev.irq = client->irq; lis3_dev.ac = lis3lv02d_axis_map; lis3_dev.pm_dev = &client->dev;