Re: [PATCH v3] ufs: poll pmc until another pa request is completed

[Bart Van Assche]

On 5/15/23 20:52, Kiwoong Kim wrote:
> +		spin_lock_irqsave(hba->host->host_lock, flags);
> +		hba->active_uic_cmd = NULL;
> +		if (ufshcd_is_link_broken(hba)) {
> +			spin_unlock_irqrestore(hba->host->host_lock, flags);
> +			ret = -ENOLINK;
> +			goto out;
> +		}
> +		hba->uic_async_done = cnf;
> +		cmd->argument2 = 0;
> +		cmd->argument3 = mode;
> +		ret = __ufshcd_send_uic_cmd(hba, cmd, true);
> +		spin_unlock_irqrestore(hba->host->host_lock, flags);

Please consider adding 	lockdep_assert_held(&hba->uic_cmd_mutex) near
the start of __ufshcd_poll_uic_pwr() to document that this function is
serialized against other contexts that submit an UIC.

Additionally, I don't think that it is necessary to hold the host lock
around the ufshcd_is_link_broken() or __ufshcd_send_uic_cmd() calls.

Thanks,

Bart.