Michal Kazior <michal.kazior@xxxxxxxxx> writes:
> This can be useful for testing. To perform a
> forced firmware crash write 'crash' to
> 'simulate_fw_crash' debugfs file. E.g.
>
> echo crash > /sys/kernel/debug/ieee80211/phy1/ath10k/simulate_fw_crash
>
> Signed-off-by: Michal Kazior <michal.kazior@xxxxxxxxx>
[...]
> +static ssize_t ath10k_write_simulate_fw_crash(struct file *file,
> + const char __user *user_buf,
> + size_t count, loff_t *ppos)
> +{
> + struct ath10k *ar = file->private_data;
> + char buf[32] = {};
> + int ret;
> +
> + mutex_lock(&ar->conf_mutex);
> +
> + simple_write_to_buffer(buf, sizeof(buf) - 1, ppos, user_buf, count);
> + if (strcmp(buf, "crash") && strcmp(buf, "crash\n")) {
> + ath10k_warn("write keyword `crash` to simulate firmware crash\n");
> + goto exit;
> + }
Better to just return an error here.
> + if (ar->state != ATH10K_STATE_ON &&
> + ar->state != ATH10K_STATE_RESTARTED) {
> + ath10k_warn("firmware isn't loaded yet, nothing to crash\n");
> + goto exit;
> + }
Ditto.
--
Kalle Valo
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