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Date: Mon, 24 Aug 2026 05:23:57 +0000
From: Tzung-Bi Shih <tzungbi@kernel.org>
To: Mayank Rungta <mrungta@google.com>
Cc: "Rafael J . Wysocki" <rafael@kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Danilo Krummrich <dakr@kernel.org>, Len Brown <lenb@kernel.org>,
	Pavel Machek <pavel@kernel.org>,
	Douglas Anderson <dianders@chromium.org>, linux-pm@vger.kernel.org,
	driver-core@lists.linux.dev, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] PM: sleep: Add DPM watchdog to late/early/noirq phases
Message-ID: <aovVbT61s-DseUB7@google.com>
References: <20260821170648.3097673-1-mrungta@google.com>
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In-Reply-To: <20260821170648.3097673-1-mrungta@google.com>

On Fri, Aug 21, 2026 at 10:06:48AM -0700, Mayank Rungta wrote:
> Extend the DPM watchdog to wrap device_suspend_late, device_suspend_noirq,
> device_resume_early, and device_resume_noirq callbacks. If a driver hangs
> during these transitions, the watchdog will fire and dump a stack trace
> to help identify the offending driver.
> 
> To prevent false-positive timeouts, the watchdog is set only after
> waiting for subordinate (during suspend) and superior (during resume)
> devices.
> 
> Signed-off-by: Mayank Rungta <mrungta@google.com>

Reviewed-by: Tzung-Bi Shih <tzungbi@kernel.org>