[v4] wifi: ath11k: Add crash logging

[Kalle Valo]

Arowa Suliman <arowa at chromium.org> writes:

> Currently, the ath11k driver does not print a crash signature when a
> crash happens. Checked by triggering a simulated crash using the command
> [1] and checking dmesg for logs.
>
> [1] echo assert > /sys/kernel/debug/ath11k/../simulate_fw_crash
>
> Change the crash logging from debug to informational and add a warning
> when firmware crash MHI_CB_EE_RDDM happens.
>
> Tested-on: WCN6855 hw2.0 PCI
> WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.23
>
> Signed-off-by: Arowa Suliman <arowa at chromium.org>

I did some cosmetic cleanup to the commit log.

> --- a/drivers/net/wireless/ath/ath11k/mhi.c
> +++ b/drivers/net/wireless/ath/ath11k/mhi.c
> @@ -325,14 +325,15 @@ static void ath11k_mhi_op_status_cb(struct mhi_controller *mhi_cntrl,
>  {
>  	struct ath11k_base *ab = dev_get_drvdata(mhi_cntrl->cntrl_dev);
>  
> -	ath11k_dbg(ab, ATH11K_DBG_BOOT, "notify status reason %s\n",
> -		   ath11k_mhi_op_callback_to_str(cb));
> +	ath11k_info(ab, "notify status reason %s\n",
> +		    ath11k_mhi_op_callback_to_str(cb));

In my view info, warning and error messages need to be at least somewhat
understandable to the user. I think this message is not understandable
and it should remain as a debug message. So I removed this change.

Please check my changes in the pending branch:

https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git/commit/?h=pending&id=f9325b14e830f3e8b5a557352e7c65f321bb7b05

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