Em sex., 17 de mai. de 2024 às 13:57, Jonathan Bither
<jonbither@xxxxxxxxx> escreveu:
>
>
> On 5/17/24 10:16, Guilherme Giacomo Simoes wrote:
> > In the dmesg is showing the message "failed to read out thermal zone"
> > as if the temperature read is failed by don't find the thermal zone.
> >
> > After researching and debugging, I see that this specific error is
> > occurrenced because the thermal try read the temperature when is started,
> > but the firmware is not running yet.
> >
> > For more legibiliti i change the tt.c for return EAGAIN when this was occurrence.
> > After this change, in my computer I compile and install kernel in /boot
> > and in my dmesg the message "failed to read out thermal zone" is not show
> > any more.
> >
> > I would like to thanks for Rafael Wysocki <refael.j.wysocki@xxxxxxxxx> for
> > your suggestions in mu first patch that results in this another patch.
> > ---
> > drivers/net/wireless/intel/iwlwifi/mvm/tt.c | 10 ++++++++--
> > 1 file changed, 8 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tt.c b/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
> > index 8083c4b2ab6b..68ab9966330c 100644
> > --- a/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
> > +++ b/drivers/net/wireless/intel/iwlwifi/mvm/tt.c
> > @@ -620,8 +620,14 @@ static int iwl_mvm_tzone_get_temp(struct thermal_zone_device *device,
> >
> > mutex_lock(&mvm->mutex);
> >
> > - if (!iwl_mvm_firmware_running(mvm) ||
> > - mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR) {
> > + const int res = iwl_mvm_firmware_running(mvm);
> > +
> > + if (!res) {
> > + ret = -EAGAIN;
> > + goto out;
> > + }
> > +
>
> You could skip using the res variable and move the mutex lock here and
> simplify the above a bit. Ex:
>
> int temp;
>
> - mutex_lock(&mvm->mutex);
> + if (!iwl_mvm_firmware_running(mvm))
> + return -EAGAIN;
>
> - if (!iwl_mvm_firmware_running(mvm) ||
> - mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR) {
> + mutex_lock(&mvm->mutex);
> + if (mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR) {
> ret = -ENODATA;
> goto out;
> }
>
> > + if (mvm->fwrt.cur_fw_img != IWL_UCODE_REGULAR) {
> > ret = -ENODATA;
> > goto out;
> > }
Hey Jonathan, Thank you for your suggestion.
I sended a v2 patch of this patch
https://patchwork.kernel.org/project/linux-wireless/patch/20240517171311.3705-1-trintaeoitogc@xxxxxxxxx/
If you want, you can send this suggestion in this patch v2.
Thanks.
