linux-kernel - RE: [PATCH v2 1/3] media: pci: intel: ivsc: Add CSI submodule

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Date:   Fri, 17 Feb 2023 07:37:31 +0000
From:   "Wu, Wentong" <wentong.wu@...el.com>
To:     Hillf Danton <hdanton@...a.com>
CC:     "mchehab@...nel.org" <mchehab@...nel.org>,
        "sakari.ailus@...ux.intel.com" <sakari.ailus@...ux.intel.com>,
        "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
        "Pandruvada, Srinivas" <srinivas.pandruvada@...el.com>,
        "pierre-louis.bossart@...ux.intel.com" 
        <pierre-louis.bossart@...ux.intel.com>,
        "Wang, Zhifeng" <zhifeng.wang@...el.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v2 1/3] media: pci: intel: ivsc: Add CSI submodule



> -----Original Message-----
> From: Hillf Danton <hdanton@...a.com>
> Sent: Friday, February 17, 2023 2:28 PM
> 
> On Fri, 17 Feb 2023 05:52:38 +0000 Wentong Wu <wentong.wu@...el.com>
> >
> > Thanks, but what do you mean "emulated"?=20
> >
> Construct a scenario that ensures wakeup comes late because of no wait for
> completion. And we can see what will happen with the current test cases.

Thanks, I will remove reinit_completion

> 
> > static int mei_csi_send(u8 *buf, size_t len)
> > +{
> > +	struct csi_cmd *cmd = (struct csi_cmd *)buf;
> > +	int ret;
> > +
> > +	reinit_completion(&csi->cmd_completion);
> > +
> > +	ret = mei_cldev_send(csi->cldev, buf, len);
> > +	if (ret < 0)
> > +		goto out;
> 
> 	return  -ETIMEDOUT;
> 
> > +
> > +	ret = wait_for_completion_killable_timeout(&csi->cmd_completion,
> > +						   CSI_CMD_TIMEOUT);
> > +	if (ret < 0) {
> > +		goto out;
> > +	} else if (!ret) {
> > +		ret = -ETIMEDOUT;
> > +		goto out;
> > +	}
> > +
> > +	/* command response status */
> > +	ret = csi->cmd_response.status;
> > +	if (ret) {
> > +		ret = -EINVAL;
> > +		goto out;
> > +	}
> > +
> > +	if (csi->cmd_response.cmd_id != cmd->cmd_id)
> > +		ret = -EINVAL;
> > +
> > +out:
> > +	return ret;
> > +}