From: Paul Davey paul.davey@alliedtelesis.co.nz
On big endian architectures the mhi debugfs files which report pm state give "Invalid State" for all states. This is caused by using find_last_bit which takes an unsigned long* while the state is passed in as an enum mhi_pm_state which will be of int size.
Fix by using __fls to pass the value of state instead of find_last_bit.
Fixes: a6e2e3522f29 ("bus: mhi: core: Add support for PM state transitions") Signed-off-by: Paul Davey paul.davey@alliedtelesis.co.nz Reviewed-by: Manivannan Sadhasivam mani@kernel.org Reviewed-by: Hemant Kumar hemantk@codeaurora.org Cc: stable@vger.kernel.org Signed-off-by: Manivannan Sadhasivam manivannan.sadhasivam@linaro.org --- drivers/bus/mhi/core/init.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c index 046f407dc5d6..0d588b60929e 100644 --- a/drivers/bus/mhi/core/init.c +++ b/drivers/bus/mhi/core/init.c @@ -79,10 +79,12 @@ static const char * const mhi_pm_state_str[] = {
const char *to_mhi_pm_state_str(enum mhi_pm_state state) { - unsigned long pm_state = state; - int index = find_last_bit(&pm_state, 32); + int index;
- if (index >= ARRAY_SIZE(mhi_pm_state_str)) + if (state) + index = __fls(state); + + if (!state || index >= ARRAY_SIZE(mhi_pm_state_str)) return "Invalid State";
return mhi_pm_state_str[index]; @@ -789,7 +791,6 @@ static int parse_ch_cfg(struct mhi_controller *mhi_cntrl, mhi_chan->offload_ch = ch_cfg->offload_channel; mhi_chan->db_cfg.reset_req = ch_cfg->doorbell_mode_switch; mhi_chan->pre_alloc = ch_cfg->auto_queue; - mhi_chan->wake_capable = ch_cfg->wake_capable;
/* * If MHI host allocates buffers, then the channel direction