linux-kernel - Re: [PATCH v2] gpio/omap: add *remove* callback in platform

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]

Date:	Wed, 8 Aug 2012 19:38:07 +0530
From:	"DebBarma, Tarun Kanti" <tarun.kanti@...com>
To:	"Shilimkar, Santosh" <santosh.shilimkar@...com>
Cc:	linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, Kevin Hilman <khilman@...com>,
	Rajendra Nayak <rnayak@...com>,
	"Cousson, Benoit" <b-cousson@...com>,
	Paul Walmsley <paul@...an.com>
Subject: Re: [PATCH v2] gpio/omap: add *remove* callback in platform_driver

On Wed, Aug 8, 2012 at 7:33 PM, Shilimkar, Santosh
<santosh.shilimkar@...com> wrote:
> On Wed, Aug 8, 2012 at 7:28 PM, Tarun Kanti DebBarma <tarun.kanti@...com> wrote:
>> Add *remove* callback so that necessary cleanup operations are
>> performed when device is unregistered. The device is deleted
>> from the list and associated clock handle is released by
>> calling clk_put() and irq descriptor is released using the
>> irq_free_desc() api.
>>
>> Signed-off-by: Tarun Kanti DebBarma <tarun.kanti@...com>
>> Reported-by: Paul Walmsley <paul@...an.com>
>> Reviewed-by: Jon Hunter <jon-hunter@...com>
>> Cc: Kevin Hilman <khilman@...com>
>> Cc: Rajendra Nayak <rnayak@...com>
>> Cc: Santosh Shilimkar <santosh.shilimkar@...com>
>> Cc: Cousson, Benoit <b-cousson@...com>
>> Cc: Paul Walmsley <paul@...an.com>
>> ---
>> v2:
>> Baseline: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
>> Commit: 0d7614f09c1ebdbaa1599a5aba7593f147bf96ee (Linux 3.6-rc1)
>>
>> (1) Use irq_free_descs() instead of irq_free_desc().
>>     Besides, irq_free_desc() was using wrong parameter,
>>     irq_base, instead of bank->irq.
>> (2) irq_free_descs() moved outside spin_lock/unlock_*()
>>     in order to avoid exception warnings.
>>
>> (3) pm_runtime_disable() added so that bind can happen successfully
>>
>> Test Detail:
>> Step 1: Unbind gpio.5 device in order to invoke the *remove* callback.
>> #echo "omap_gpio.5" > sys/bus/platform/drivers/omap_gpio/unbind
>>
>> Step 2: Bind gpio.5 device and confirm probe() for the device succeeds.
>> #echo "omap_gpio.5" > sys/bus/platform/drivers/omap_gpio/bind
>>
>> Step 3: Execute read/write GPIO test case.
>>
> Thanks details about test. Whe  you to "Unbind->bind", do
> you see that PM is not broken.
>
> In other words, can you also test and ensure that the OMAP3 suspend and
> CPUIDLE are not broken because of this patch.
> PER and CORE domains should transition to low power states.
Sure, I will do the PM test on OMAP3 and confirm this.
---
Tarun
>
> Regards
> Santosh
--
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/