From: Shawn Guo <shawnguo@kernel.org>
To: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Vinod Koul <vkoul@kernel.org>, Arnd Bergmann <arnd@kernel.org>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
Robin Gong <yibin.gong@nxp.com>
Subject: Re: [PATCH] arm64: defconfig: Disable firmware sysfs fallback
Date: Tue, 5 Oct 2021 14:05:48 +0800 [thread overview]
Message-ID: <20211005060547.GS20743@dragon> (raw)
In-Reply-To: <20210930215300.60290-1-bjorn.andersson@linaro.org>
On Thu, Sep 30, 2021 at 02:53:00PM -0700, Bjorn Andersson wrote:
> Part of the enablement of SDMA on the IMX platforms, '7f4e4afa140c
> ("arm64: defconfig: Enable SDMA on i.mx8mq/8mm")' also enabled
> CONFIG_FW_LOADER_USER_HELPER_FALLBACK, to allow "firmware loaded by
> udev".
>
> Unfortunately having the fallback enabled does, due to the 60 second
> timeout, essentially requiring userspace to provide a firmware loader.
> But systemd dropped the support for this interface back in 2014 and
> because arm64 is the only architecture that has this enabled, there
> doesn't seem to be any standard solution available.
>
> Examples of this problem can be found in e.g. the ath10k driver, which
> with a standard distro can take about 10 minutes before wlan0 appears.
>
> The alternative to this patch would be to change these drivers to use
> firmware_request_direct(), to avoid the sysfs fallback. But that would
> prevent other systems, such as Android, to rely on a userspace firmware
> loader to pick the firmware from a non-standard place, with just a
> custom defconfig.
>
> This patch therefor attempts to align the arm64 defconfig will all other
> architectures in the upstream kernel.
>
> Cc: Robin Gong <yibin.gong@nxp.com>
> Cc: Shawn Guo <shawnguo@kernel.org>
Acked-by: Shawn Guo <shawnguo@kernel.org>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
> ---
> arch/arm64/configs/defconfig | 1 -
> 1 file changed, 1 deletion(-)
>
> diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
> index da988a54bfb9..f9e0b3fdaf0b 100644
> --- a/arch/arm64/configs/defconfig
> +++ b/arch/arm64/configs/defconfig
> @@ -243,7 +243,6 @@ CONFIG_PCI_EPF_TEST=m
> CONFIG_DEVTMPFS=y
> CONFIG_DEVTMPFS_MOUNT=y
> CONFIG_FW_LOADER_USER_HELPER=y
> -CONFIG_FW_LOADER_USER_HELPER_FALLBACK=y
> CONFIG_HISILICON_LPC=y
> CONFIG_SIMPLE_PM_BUS=y
> CONFIG_FSL_MC_BUS=y
> --
> 2.29.2
>
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-10-05 6:08 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-30 21:53 [PATCH] arm64: defconfig: Disable firmware sysfs fallback Bjorn Andersson
2021-10-01 0:12 ` Dmitry Baryshkov
2021-10-05 6:05 ` Shawn Guo [this message]
2021-10-17 15:31 ` (subset) " Bjorn Andersson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20211005060547.GS20743@dragon \
--to=shawnguo@kernel.org \
--cc=arnd@kernel.org \
--cc=bjorn.andersson@linaro.org \
--cc=catalin.marinas@arm.com \
--cc=geert+renesas@glider.be \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-arm-msm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=vkoul@kernel.org \
--cc=will@kernel.org \
--cc=yibin.gong@nxp.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).