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From: Stephen Boyd <sboyd-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
To: Kiran Gunda <kgunda-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>,
	gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org,
	Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
	Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
	Abhijeet Dharmapurikar
	<adharmap-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>,
	David Collins <collinsd-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>,
	devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: shawnguo-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
	linux-arm-msm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-arm-msm-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH V2] spmi: pmic-arb: Enforce the ownership check optionally
Date: Mon, 21 Aug 2017 16:18:58 -0700	[thread overview]
Message-ID: <e0af96c3-208b-abfc-8b2a-4ea1cc810ec7@codeaurora.org> (raw)
In-Reply-To: <1503070110-15018-1-git-send-email-kgunda-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>

On 08/18/2017 08:28 AM, Kiran Gunda wrote:
> The peripheral ownership check is not necessary on single master
> platforms. Hence, enforce the peripheral ownership check optionally.
>
> Signed-off-by: Kiran Gunda <kgunda-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
> Tested-by: Shawn Guo <shawnguo-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
> ---

This sounds like a band-aid. Isn't the gpio driver going to keep probing
all the pins that are not supposed to be accessed due to security
constraints? What exactly is failing in the gpio case?

Also, I thought we were getting rid of the ownership checks? Or at
least, putting them behind some debug kernel feature check or something?

-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project

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WARNING: multiple messages have this Message-ID (diff)
From: Stephen Boyd <sboyd@codeaurora.org>
To: Kiran Gunda <kgunda@codeaurora.org>,
	gregkh@linuxfoundation.org, Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Abhijeet Dharmapurikar <adharmap@codeaurora.org>,
	David Collins <collinsd@codeaurora.org>,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: shawnguo@kernel.org, linux-arm-msm@vger.kernel.org,
	linux-arm-msm-owner@vger.kernel.org
Subject: Re: [PATCH V2] spmi: pmic-arb: Enforce the ownership check optionally
Date: Mon, 21 Aug 2017 16:18:58 -0700	[thread overview]
Message-ID: <e0af96c3-208b-abfc-8b2a-4ea1cc810ec7@codeaurora.org> (raw)
In-Reply-To: <1503070110-15018-1-git-send-email-kgunda@codeaurora.org>

On 08/18/2017 08:28 AM, Kiran Gunda wrote:
> The peripheral ownership check is not necessary on single master
> platforms. Hence, enforce the peripheral ownership check optionally.
>
> Signed-off-by: Kiran Gunda <kgunda@codeaurora.org>
> Tested-by: Shawn Guo <shawnguo@kernel.org>
> ---

This sounds like a band-aid. Isn't the gpio driver going to keep probing
all the pins that are not supposed to be accessed due to security
constraints? What exactly is failing in the gpio case?

Also, I thought we were getting rid of the ownership checks? Or at
least, putting them behind some debug kernel feature check or something?

-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project

  parent reply	other threads:[~2017-08-21 23:18 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-08-18 15:28 [PATCH V2] spmi: pmic-arb: Enforce the ownership check optionally Kiran Gunda
     [not found] ` <1503070110-15018-1-git-send-email-kgunda-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2017-08-21 23:18   ` Stephen Boyd [this message]
2017-08-21 23:18     ` Stephen Boyd
2017-08-22  8:55     ` Shawn Guo
2017-08-22 20:31       ` Stephen Boyd
2017-08-22 20:31         ` Stephen Boyd
2017-08-23 12:57         ` kgunda
2017-08-24 12:18         ` Shawn Guo
2017-08-24 18:37           ` Stephen Boyd
2017-08-24 18:37             ` Stephen Boyd
2017-08-25  7:47             ` Shawn Guo
2017-08-25 23:18               ` Stephen Boyd
2017-08-25 23:18                 ` Stephen Boyd
     [not found]                 ` <20170825231818.GP21656-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2017-08-26  3:46                   ` Shawn Guo
2017-08-26  3:46                     ` Shawn Guo
2017-08-30 21:02                     ` Stephen Boyd
2017-08-30 21:02                       ` Stephen Boyd
2017-08-31  8:37                       ` Shawn Guo
2017-09-01  1:30                         ` Stephen Boyd
     [not found]                           ` <20170901013048.GK21656-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2017-09-01  3:00                             ` Shawn Guo
2017-09-01  3:00                               ` Shawn Guo
2017-08-28  8:27       ` Fenglin Wu
     [not found]         ` <93b8935e-061f-ba3a-ee36-8ffbc8230bcc-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2017-08-28 14:47           ` Shawn Guo
2017-08-28 14:47             ` Shawn Guo
2017-08-22  9:01     ` Shawn Guo
2017-08-28 11:53 ` Greg KH
2017-08-28 14:08   ` Shawn Guo

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