linux-kernel - Re: [PATCH 04/14] mailbox: pcc: Return early if no GAS register from pcc_mbox_cmd_complete

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Message-ID: <db214092-9778-ac0c-0d6a-ef95bd468667@huawei.com>
Date: Wed, 5 Mar 2025 13:57:30 +0800
From: "lihuisong (C)" <lihuisong@...wei.com>
To: Sudeep Holla <sudeep.holla@....com>, <linux-acpi@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
CC: Jassi Brar <jassisinghbrar@...il.com>, Adam Young
	<admiyo@...amperecomputing.com>
Subject: Re: [PATCH 04/14] mailbox: pcc: Return early if no GAS register from
 pcc_mbox_cmd_complete_check


在 2025/3/3 18:51, Sudeep Holla 写道:
> pcc_mbox_cmd_complete_check() accesses pchan->cmd_complete.gas to check
> command completion status. Even if GAS is NULL, pcc_chan_reg_read() gets
> called which returns success doing nothing and then we return.
>
> Add an early return if pchan->cmd_complete.gas == NULL before performing
> any operations.
>
> Signed-off-by: Sudeep Holla <sudeep.holla@....com>
> ---
Acked-by: Huisong Li <lihuisong@...wei.com>