On 20.02.24 20:00, Hans de Goede wrote:
> When not configured for wakeup lis3lv02d_i2c_suspend() will call
> lis3lv02d_poweroff() even if the device has already been turned off
> by the runtime-suspend handler and if configured for wakeup and
> the device is runtime-suspended at this point then it is not turned
> back on to serve as a wakeup source.
>
> [...]
>
> Fixes: b1b9f7a49440 ("misc: lis3lv02d_i2c: Add missing setting of the reg_ctrl callback")
> Reported-by: Paul Menzel <pmenzel@xxxxxxxxxxxxx>
> Closes: https://lore.kernel.org/regressions/5fc6da74-af0a-4aac-b4d5-a000b39a63a5@xxxxxxxxxxxxx/
> Cc: stable@xxxxxxxxxxxxxxx
> Cc: regressions@xxxxxxxxxxxxxxx
Paul, did you maybe test this? I suppose Greg had no time to review this
yet due to all the CVE stuff and stable tree maintenance; but with a bit
of luck a "Tested-by" from your side might motivate him or somebody else
to look into this.
Ciao, Thorsten
> Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
> ---
> drivers/misc/lis3lv02d/lis3lv02d_i2c.c | 21 +++++++++++++--------
> 1 file changed, 13 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/misc/lis3lv02d/lis3lv02d_i2c.c b/drivers/misc/lis3lv02d/lis3lv02d_i2c.c
> index c6eb27d46cb0..15119584473c 100644
> --- a/drivers/misc/lis3lv02d/lis3lv02d_i2c.c
> +++ b/drivers/misc/lis3lv02d/lis3lv02d_i2c.c
> @@ -198,8 +198,14 @@ static int lis3lv02d_i2c_suspend(struct device *dev)
> struct i2c_client *client = to_i2c_client(dev);
> struct lis3lv02d *lis3 = i2c_get_clientdata(client);
>
> - if (!lis3->pdata || !lis3->pdata->wakeup_flags)
> + /* Turn on for wakeup if turned off by runtime suspend */
> + if (lis3->pdata && lis3->pdata->wakeup_flags) {
> + if (pm_runtime_suspended(dev))
> + lis3lv02d_poweron(lis3);
> + /* For non wakeup turn off if not already turned off by runtime suspend */
> + } else if (!pm_runtime_suspended(dev))
> lis3lv02d_poweroff(lis3);
> +
> return 0;
> }
>
> @@ -208,13 +214,12 @@ static int lis3lv02d_i2c_resume(struct device *dev)
> struct i2c_client *client = to_i2c_client(dev);
> struct lis3lv02d *lis3 = i2c_get_clientdata(client);
>
> - /*
> - * pm_runtime documentation says that devices should always
> - * be powered on at resume. Pm_runtime turns them off after system
> - * wide resume is complete.
> - */
> - if (!lis3->pdata || !lis3->pdata->wakeup_flags ||
> - pm_runtime_suspended(dev))
> + /* Turn back off if turned on for wakeup and runtime suspended*/
> + if (lis3->pdata && lis3->pdata->wakeup_flags) {
> + if (pm_runtime_suspended(dev))
> + lis3lv02d_poweroff(lis3);
> + /* For non wakeup turn back on if not runtime suspended */
> + } else if (!pm_runtime_suspended(dev))
> lis3lv02d_poweron(lis3);
>
> return 0;
