From: Stephen Boyd <sboyd@kernel.org>
To: Maxime Ripard <maxime@cerno.tech>,
Michael Turquette <mturquette@baylibre.com>
Cc: linux-kernel@vger.kernel.org,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@collabora.com>,
Maxime Ripard <maxime@cerno.tech>,
linux-clk@vger.kernel.org
Subject: Re: [PATCH 2/4] clk: Initialize the clk_rate_request even if clk_core is NULL
Date: Thu, 27 Oct 2022 17:09:11 -0700 [thread overview]
Message-ID: <20221028000913.E590AC4347C@smtp.kernel.org> (raw)
In-Reply-To: <20221018-clk-range-checks-fixes-v1-2-f3ef80518140@cerno.tech>
Quoting Maxime Ripard (2022-10-18 06:52:57)
> Since commit c35e84b09776 ("clk: Introduce clk_hw_init_rate_request()"),
> users that used to initialize their clk_rate_request by initializing
> their local structure now rely on clk_hw_init_rate_request().
>
> This function is backed by clk_core_init_rate_req(), which will skip the
> initialization if either the pointer to struct clk_core or to struct
> clk_rate_request are NULL.
>
> However, the core->parent pointer might be NULL because the clock is
> orphan, and we will thus end up with our local struct clk_rate_request
> left untouched.
>
> And since clk_hw_init_rate_request() doesn't return an error, we will
> then call a determine_rate variant with that unitialized structure.
>
> In order to avoid this, let's clear our clk_rate_request if the pointer
> to it is valid but the pointer to struct clk_core isn't.
>
> Fixes: c35e84b09776 ("clk: Introduce clk_hw_init_rate_request()")
> Signed-off-by: Maxime Ripard <maxime@cerno.tech>
> ---
Applied to clk-fixes
next prev parent reply other threads:[~2022-10-28 0:09 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-18 13:52 [PATCH 0/4] clk: Rate range improvements Maxime Ripard
2022-10-18 13:52 ` [PATCH 1/4] clk: Remove WARN_ON NULL parent in clk_core_init_rate_req() Maxime Ripard
2022-10-18 14:35 ` AngeloGioacchino Del Regno
2022-10-28 0:06 ` Stephen Boyd
2022-10-18 13:52 ` [PATCH 2/4] clk: Initialize the clk_rate_request even if clk_core is NULL Maxime Ripard
2022-10-18 14:35 ` AngeloGioacchino Del Regno
2022-10-28 0:09 ` Stephen Boyd [this message]
2022-10-18 13:52 ` [PATCH 3/4] clk: Initialize max_rate in struct clk_rate_request Maxime Ripard
2022-10-18 14:35 ` AngeloGioacchino Del Regno
2022-10-28 0:09 ` Stephen Boyd
2022-10-18 13:52 ` [PATCH 4/4] clk: Warn if we register a mux without determine_rate Maxime Ripard
2022-10-18 14:34 ` AngeloGioacchino Del Regno
2022-10-26 2:07 ` Stephen Boyd
2022-10-26 13:52 ` maxime
2022-10-27 21:45 ` Stephen Boyd
2022-11-03 12:39 ` Maxime Ripard
2022-11-03 12:33 ` Maxime Ripard
2022-11-04 18:10 ` Stephen Boyd
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