From: "Troy Mitchell" <troy.mitchell@linux.spacemit.com>
To: "Anand Moon" <linux.amoon@gmail.com>,
"Troy Mitchell" <troy.mitchell@linux.spacemit.com>,
"Andi Shyti" <andi.shyti@kernel.org>,
"Sebastian Reichel" <sre@kernel.org>,
"Yixun Lan" <dlan@kernel.org>,
"Aurelien Jarno" <aurelien@aurel32.net>,
"open list:I2C SUBSYSTEM HOST DRIVERS"
<linux-i2c@vger.kernel.org>,
"open list" <linux-kernel@vger.kernel.org>,
"open list:SYSTEM RESET/SHUTDOWN DRIVERS"
<linux-pm@vger.kernel.org>,
"open list:RISC-V SPACEMIT SoC Support"
<linux-riscv@lists.infradead.org>,
"open list:RISC-V SPACEMIT SoC Support"
<spacemit@lists.linux.dev>
Cc: "Alex Elder" <elder@riscstar.com>
Subject: Re: [PATCH v1 1/2] i2c: spacemit: Avoid sleeping during bus reset in atomic context
Date: Tue, 10 Nov 2026 06:49:28 +0000 [thread overview]
Message-ID: <DMRBWY2S42EN.1CNW1DNHJOKKD@linux.spacemit.com> (raw)
In-Reply-To: <20261110061429.2036-1-linux.amoon@gmail.com>
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On Tue Nov 10, 2026 at 6:14 AM GMT, Anand Moon wrote:
> The spacemit_i2c_conditionally_reset_bus() function uses usleep_range()
> to wait after triggering a bus reset request. However, this function can
> be invoked during atomic I2C transfers (such as power-off or restart
> handlers running in atomic notifier chains), where sleeping is illegal.
>
> Replace the sleep operation with the driver's internal helper,
> spacemit_i2c_delay(), which conditionally uses udelay() when running in
> an atomic context, avoiding "scheduling while atomic" bugs.
>
> Assisted-by: LLM
Also, please drop this tag. The same applies to patch 2.
See commit 1e035297ffda.
--
Troy Mitchell
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next prev parent reply other threads:[~2026-11-10 6:50 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-10 6:14 Anand Moon
2026-11-10 6:14 ` [PATCH v1 2/2] power: reset: spacemit-p1: Use atomic I2C transfers for power-off and restart Anand Moon
2026-11-10 6:41 ` [PATCH v1 1/2] i2c: spacemit: Avoid sleeping during bus reset in atomic context Troy Mitchell
2026-11-10 6:49 ` Troy Mitchell [this message]
2026-11-10 7:04 ` Anand Moon
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