On Sat, Jul 11, 2026 at 01:16:38AM +0530, Sailesh Nandanavanam wrote:
> In q6v5_regulator_enable(), when any operation fails for regulator at
> index 'i', the error cleanup path unconditionally calls
> regulator_disable() starting from index 'i'. However, regulator 'i'
> was never successfully enabled at this point, resulting in an
> unbalanced disable.
>
> There are three distinct failure points:
> - regulator_set_voltage() failure: voltage was never set, load was
> never set, regulator was never enabled.
> - regulator_set_load() failure: voltage was set, but regulator was
> never enabled.
> - regulator_enable() failure: voltage and load were set, but
> regulator was never enabled.
>
> Fix this by introducing three separate error labels to handle each
> failure point correctly. For the failing regulator at index 'i',
> only reset the resources that were actually configured, without
> calling regulator_disable(). Then roll back all previously enabled
> regulators using 'i--' in the for loop initializer to skip the
> never-enabled regulator.
>
> Fixes: 19f902b53b47 ("remoteproc: qcom: Initialize and enable proxy and
> active regulators.")
> Cc: [email protected]
> Signed-off-by: Sailesh Nandanavanam <[email protected]>
> ---
> drivers/remoteproc/qcom_q6v5_mss.c | 16 +++++++++++-----
> 1 file changed, 11 insertions(+), 5 deletions(-)
>
Reviewed-by: Dmitry Baryshkov <[email protected]>
--
With best wishes
Dmitry
