From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 17EB31991A9; Thu, 5 Sep 2024 13:46:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725543985; cv=none; b=GV+TBPCO6vVRbQBj0Jt0QjuLOaCv7OaPd7NuHQVLqGXEKrl39CPHMTZJecDaiF7SG6JQDE2oIfTsLaV6xiP8KTQWoO3Krym2vVQszRmEgJPhqh62bKZCVv/YvZRYRvzncXrYwFGGetcJWFIZyRi0k8VhcCDFawlRAU3Gq2iG8UQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725543985; c=relaxed/simple; bh=GQZAEp8fjoyPw58mOjAfHRzea9bsP3cmexcWmvk/rmo=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=t0R9DyJ1tnSU0sAqb1R3hFe/s2tesEwdMnbOTEYxK5ku5TYJIhG6fA2R3fjYGTxnzKD/y73uxBCuJcL1sLytccdv1OHcw/dXT9WYQKmqH1bYrKSdbAJ0zA8gRhhiGHEXa3FRNR/x5zH4PVQ5MhtyuAozQpaxAl54r3oO8dIjneE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=i7ZP1P0W; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="i7ZP1P0W" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B1942C4CEC3; Thu, 5 Sep 2024 13:46:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1725543984; bh=GQZAEp8fjoyPw58mOjAfHRzea9bsP3cmexcWmvk/rmo=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=i7ZP1P0WGaLa5SlSkdum2to6VyUfztq00fNfKcYjQHL2Ynw/BuDuGb4NvZTssQShn ea58Xqz2qKmInPEhR8NKQegOEqnJirnA/z2rfV9fmqpXwDaAhPGG01/bD4ndanoz7q bBkMYrXGZD9igz0vPYBBWWUq484cXzsnQP38zweZYMneor6olCbLu4Son6TBqxzKtX PqhHQGcBJZr9ybPCiJp4YWArFXVFXYKr6k2ptvXr047i/AUSLp60NuQTYHx7jm+tf9 RxOgzDAMg807O0oLq4HLcEPrCtAb2G49IYIjHAmQCQgDRvpjLFT5sULimMoyxRPwD+ +Jdw6fLmUZpmw== Message-ID: Date: Thu, 5 Sep 2024 15:46:18 +0200 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 10/29] media: iris: implement power management To: Bryan O'Donoghue , quic_dikshita@quicinc.com, Vikash Garodia , Abhinav Kumar , Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Philipp Zabel Cc: linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20240827-iris_v3-v3-0-c5fdbbe65e70@quicinc.com> <20240827-iris_v3-v3-10-c5fdbbe65e70@quicinc.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 05/09/2024 15:23, Bryan O'Donoghue wrote: > On 27/08/2024 11:05, Dikshita Agarwal via B4 Relay wrote: >> From: Dikshita Agarwal >> >> Implement runtime power management for iris including >> platform specific power on/off sequence. >> >> Signed-off-by: Dikshita Agarwal > >> +int iris_hfi_pm_suspend(struct iris_core *core) >> +{ >> + int ret; >> + >> + if (!mutex_is_locked(&core->lock)) >> + return -EINVAL; >> + >> + if (core->state != IRIS_CORE_INIT) >> + return -EINVAL; > > Reiterating a previous point > > Are these checks realistic or defensive coding ? Well, this one: if (!mutex_is_locked(&core->lock)) is clear bug or someone is reinventing lockdep. >> + >> + if (!core->power_enabled) { >> + dev_err(core->dev, "power not enabled\n"); >> + return 0; >> + } > > Similarly is this a real check an error that can happen and if so how ? And here re-inventing runtime PM. Best regards, Krzysztof