On Fri, Jun 18, 2021 at 03:31:31PM +1200, Paul Davey wrote:
> On big endian architectures the mhi debugfs files which report pm state
> give "Invalid State" for all states.
>
> Fix to_mhi_pm_state_str by using a local unsigned long as an intemediate
> to pass the state to find_last_bit to avoid endianness issues with cast
> from enum mhi_pm_state * to unsigned long *.
>
> Signed-off-by: Paul Davey <paul.davey@xxxxxxxxxxxxxxxxxxx>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
Thanks,
Mani
> ---
> drivers/bus/mhi/core/init.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c
> index c81b377fca8f..87cc0c449078 100644
> --- a/drivers/bus/mhi/core/init.c
> +++ b/drivers/bus/mhi/core/init.c
> @@ -79,7 +79,8 @@ static const char * const mhi_pm_state_str[] = {
>
> const char *to_mhi_pm_state_str(enum mhi_pm_state state)
> {
> - int index = find_last_bit((unsigned long *)&state, 32);
> + unsigned long tmp = state;
> + int index = find_last_bit((unsigned long *)&tmp, 32);
>
> if (index >= ARRAY_SIZE(mhi_pm_state_str))
> return "Invalid State";
> --
> 2.32.0
>
