From: Arend van Spriel <arend.vanspriel@broadcom.com>
To: Daniel Wagner <daniel.wagner@bmw-carit.de>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Daniel Wagner <wagi@monom.org>,
Bastien Nocera <hadess@hadess.net>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Johannes Berg <johannes.berg@intel.com>,
Kalle Valo <kvalo@codeaurora.org>,
Ohad Ben-Cohen <ohad@wizery.com>,
linux-input@vger.kernel.org, linux-kselftest@vger.kernel.org,
linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org,
"Luis R. Rodriguez" <mcgrof@kernel.org>
Subject: Re: [RFC v0 7/8] Input: ims-pcu: use firmware_stat instead of completion
Date: Sat, 30 Jul 2016 14:42:41 +0200 [thread overview]
Message-ID: <ee9a29aa-0d29-a33f-e43a-057dc359cf89@broadcom.com> (raw)
In-Reply-To: <c05a7b98-5ada-701f-9a77-65d81b841c17@bmw-carit.de>
+ Luis (again) ;-)
On 29-07-16 08:13, Daniel Wagner wrote:
> On 07/28/2016 09:01 PM, Bjorn Andersson wrote:
>> On Thu 28 Jul 11:33 PDT 2016, Dmitry Torokhov wrote:
>>
>>> On Thu, Jul 28, 2016 at 09:55:11AM +0200, Daniel Wagner wrote:
>>>> From: Daniel Wagner <daniel.wagner@bmw-carit.de>
>>>>
>> [..]
>>>
>>> Do not quite like it... I'd rather asynchronous request give out a
>>> firmware status pointer that could be used later on.
Excellent. Why not get rid of the callback function as well and have
fw_loading_wait() return result (0 = firmware available, < 0 = fail).
Just to confirm, you are proposing a new API function next to
request_firmware_nowait(), right?
>>> pcu->fw_st = request_firmware_async(IMS_PCU_FIRMWARE_NAME,
>>> - pcu,
>>> - ims_pcu_process_async_firmware);
+ pcu);
>>> if (IS_ERR(pcu->fw_st))
>>> return PTR_ERR(pcu->fw_st);
>>>
>>> ....
>>>
>>> err = fw_loading_wait(pcu->fw_st);
if (err)
return err;
fw = fwstat_get_firmware(pcu->fw_st);
Or whatever consistent prefix it is going to be.
>>>
>>
>> In the remoteproc case (patch 6) this would clean up the code, rather
>> than replacing the completion API 1 to 1. I like it!
>
> IIRC most drivers do it the same way. So request_firmware_async() indeed
> would be good thing to have. Let me try that.
While the idea behind this series is a good one I am wondering about the
need for these drivers to use the asynchronous API. The historic reason
might be to avoid timeout caused by user-mode helper, but that may no
longer apply and these drivers could be better off using
request_firmware_direct().
There have been numerous discussions about the firmware API. Here most
recent one:
http://www.spinics.net/lists/linux-wireless/index.html#152755
Regards,
Arend
> Thanks for the excellent feedback.
>
> cheers,
> daniel
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next prev parent reply other threads:[~2016-07-30 12:42 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-28 7:55 [RFC v0 0/8] Reuse firmware loader helpers Daniel Wagner
2016-07-28 7:55 ` [RFC v0 1/8] selftests: firmware: do not abort test too early Daniel Wagner
2016-07-28 7:55 ` [RFC v0 2/8] selftests: firmware: do not clutter output Daniel Wagner
2016-07-28 7:55 ` [RFC v0 3/8] firmware: Factor out firmware load helpers Daniel Wagner
2016-07-28 15:01 ` Dan Williams
2016-07-29 6:07 ` Daniel Wagner
2016-07-28 17:57 ` Dmitry Torokhov
2016-07-29 6:08 ` Daniel Wagner
2016-07-28 7:55 ` [RFC v0 4/8] Input: goodix: use firmware_stat instead of completion Daniel Wagner
2016-07-28 11:22 ` Bastien Nocera
2016-07-28 11:59 ` Daniel Wagner
2016-07-28 12:20 ` Bastien Nocera
2016-07-28 13:10 ` Daniel Wagner
2016-07-28 7:55 ` [RFC v0 5/8] ath9k_htc: " Daniel Wagner
2016-07-28 7:55 ` [RFC v0 6/8] remoteproc: " Daniel Wagner
2016-07-28 7:55 ` [RFC v0 7/8] Input: ims-pcu: " Daniel Wagner
2016-07-28 18:33 ` Dmitry Torokhov
2016-07-28 19:01 ` Bjorn Andersson
2016-07-29 6:13 ` Daniel Wagner
2016-07-30 12:42 ` Arend van Spriel [this message]
2016-07-30 16:58 ` Luis R. Rodriguez
2016-07-31 7:23 ` Dmitry Torokhov
2016-08-01 12:26 ` Daniel Wagner
2016-08-01 19:44 ` Luis R. Rodriguez
2016-08-02 5:49 ` Daniel Wagner
2016-08-02 6:34 ` Luis R. Rodriguez
2016-08-02 6:53 ` Daniel Wagner
2016-08-02 7:41 ` Luis R. Rodriguez
2016-08-03 6:57 ` Daniel Wagner
2016-08-03 15:55 ` Luis R. Rodriguez
2016-08-03 16:18 ` Dmitry Torokhov
2016-08-03 17:37 ` Luis R. Rodriguez
2016-08-03 18:40 ` Luis R. Rodriguez
2016-08-03 22:26 ` Bjorn Andersson
2016-08-03 7:42 ` Dmitry Torokhov
2016-08-03 11:43 ` Arend van Spriel
2016-08-03 15:18 ` Luis R. Rodriguez
2016-08-03 15:35 ` Dmitry Torokhov
2016-08-03 20:42 ` Arend van Spriel
2016-08-03 16:03 ` Luis R. Rodriguez
2016-08-03 17:39 ` Bjorn Andersson
2016-08-03 18:08 ` Luis R. Rodriguez
2016-08-01 19:36 ` Luis R. Rodriguez
2016-08-01 17:19 ` Bjorn Andersson
2016-08-01 19:56 ` Luis R. Rodriguez
2016-08-01 21:34 ` Dmitry Torokhov
2016-07-31 7:17 ` Dmitry Torokhov
2016-07-28 7:55 ` [RFC v0 8/8] iwl4965: " Daniel Wagner
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