linux-kernel - Re: [PATCH v4 2/3] usb: phy: msm: fix connect/disconnect bug for dragonboard OTG port

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20151122022359.GL30882@usrtlx11787.corpusers.net>
Date:	Sat, 21 Nov 2015 18:23:59 -0800
From:	Bjorn Andersson <bjorn.andersson@...ymobile.com>
To:	Tim Bird <tim.bird@...ymobile.com>
CC:	"Peter.Chen@...escale.com" <Peter.Chen@...escale.com>,
	"robh+dt@...nel.org" <robh+dt@...nel.org>,
	"pawel.moll@....com" <pawel.moll@....com>,
	"mark.rutland@....com" <mark.rutland@....com>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"balbi@...com" <balbi@...com>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"tbird20d@...il.com" <tbird20d@...il.com>
Subject: Re: [PATCH v4 2/3] usb: phy: msm: fix connect/disconnect bug for
 dragonboard OTG port

On Fri 20 Nov 15:47 PST 2015, Tim Bird wrote:

> Add support for async_irq to wake up driver from low power mode.
> Without this, the power management code never calls resume.
> Remove a spurious interrupt enable in the driver resume function.
> 
> Signed-off-by: Tim Bird <tim.bird@...ymobile.com>

Sorry Tim for missing these things and not jumping into the discussion
before.

> ---
>  drivers/usb/phy/phy-msm-usb.c | 17 ++++++++++++++++-
>  include/linux/usb/msm_hsusb.h |  1 +
>  2 files changed, 17 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
[..]
> @@ -1732,6 +1731,12 @@ static int msm_otg_probe(struct platform_device *pdev)
>  		return motg->irq;
>  	}
>  
> +	motg->async_irq = platform_get_irq_byname(pdev, "async");
> +	if (motg->async_irq < 0) {
> +		dev_err(&pdev->dev, "platform_get_irq for async irq failed\n");

This is optional, so I must object to this being dev_err(). Except for
development purposes logging this is useless, can't we make it a
dev_dbg?

> +		motg->async_irq = 0;
> +	}
> +
[..]
> diff --git a/include/linux/usb/msm_hsusb.h b/include/linux/usb/msm_hsusb.h
> index 8c8f685..08c67a3 100644
> --- a/include/linux/usb/msm_hsusb.h
> +++ b/include/linux/usb/msm_hsusb.h
> @@ -164,6 +164,7 @@ struct msm_otg {
>  	struct usb_phy phy;
>  	struct msm_otg_platform_data *pdata;
>  	int irq;
> +	int async_irq;

This should be added to the kerneldoc above.

>  	struct clk *clk;
>  	struct clk *pclk;
>  	struct clk *core_clk;

Regards,
Bjorn
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/