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Message-ID: <ZNotwo3tRWMZta4u@kuha.fi.intel.com>
Date: Mon, 14 Aug 2023 16:36:02 +0300
From: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To: RD Babiera <rdbabiera@...gle.com>
Cc: gregkh@...uxfoundation.org, linux@...ck-us.net, badhri@...gle.com,
linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
stable@...r.kernel.org
Subject: Re: [PATCH v3] usb: typec: bus: verify partner exists in
typec_altmode_attention
On Fri, Aug 11, 2023 at 09:37:32PM +0000, RD Babiera wrote:
> diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
> index 5a7d8cc04628..97b7b22e9cf1 100644
> --- a/drivers/usb/typec/tcpm/tcpm.c
> +++ b/drivers/usb/typec/tcpm/tcpm.c
> @@ -1791,6 +1791,7 @@ static void tcpm_handle_vdm_request(struct tcpm_port *port,
> u32 p[PD_MAX_PAYLOAD];
> u32 response[8] = { };
> int i, rlen = 0;
> + int ret;
>
> for (i = 0; i < cnt; i++)
> p[i] = le32_to_cpu(payload[i]);
> @@ -1877,7 +1878,9 @@ static void tcpm_handle_vdm_request(struct tcpm_port *port,
> }
> break;
> case ADEV_ATTENTION:
> - typec_altmode_attention(adev, p[1]);
> + ret = typec_altmode_attention(adev, p[1]);
> + if (ret)
> + tcpm_log(port, "typec_altmode_attention NULL port partner altmode");
I don't think you need that ret variable:
if (typec_altmode_attention(adev, p[1]))
tcpm_log(port, "typec_altmode_attention NULL port partner altmode");
> break;
> }
> }
thanks,
--
heikki
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