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From: Maxime Ripard <maxime@cerno.tech>
To: Mike Turquette <mturquette@baylibre.com>,
	Stephen Boyd <sboyd@kernel.org>,
	linux-clk@vger.kernel.org
Cc: Naresh Kamboju <naresh.kamboju@linaro.org>,
	Alexander Stein <alexander.stein@ew.tq-group.com>,
	Marek Szyprowski <m.szyprowski@samsung.com>,
	Tony Lindgren <tony@atomide.com>,
	Jerome Brunet <jbrunet@baylibre.com>,
	Yassine Oudjana <y.oudjana@protonmail.com>,
	Neil Armstrong <narmstrong@baylibre.com>,
	Maxime Ripard <maxime@cerno.tech>
Subject: [PATCH 16/22] clk: Remove redundant clk_core_init_rate_req() call
Date: Fri,  8 Apr 2022 11:10:31 +0200	[thread overview]
Message-ID: <20220408091037.2041955-17-maxime@cerno.tech> (raw)
In-Reply-To: <20220408091037.2041955-1-maxime@cerno.tech>

Since all the users of clk_core_round_rate_nolock() will now properly
initialize, there's no need for it to initialize the request itself.

This is even dangerous, as if the clock cannot change its rate by itself
and has CLK_SET_RATE_PARENT, clk_core_round_rate_nolock() will call
itself with the parent clock but the client clk_rate_request structure.

We will then reinitialize the child request with the parent context
(parent, boundaries, etc.), which is an issue if the parent ever changes
its own parent or parent rate.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
 drivers/clk/clk.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 3a59152b06b8..ccb6e9686fb8 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -1431,8 +1431,6 @@ static int clk_core_round_rate_nolock(struct clk_core *core,
 		return 0;
 	}
 
-	clk_core_init_rate_req(core, req, req->rate);
-
 	if (clk_core_can_round(core))
 		return clk_core_determine_round_nolock(core, req);
 	else if (core->flags & CLK_SET_RATE_PARENT)
-- 
2.35.1


  parent reply	other threads:[~2022-04-08  9:14 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-08  9:10 [PATCH 00/22] clk: More clock rate fixes and tests Maxime Ripard
2022-04-08  9:10 ` [PATCH 01/22] clk: Drop the rate range on clk_put() Maxime Ripard
2022-04-08  9:10 ` [PATCH 02/22] clk: tests: Add test suites description Maxime Ripard
2022-04-23  4:06   ` Stephen Boyd
2022-04-08  9:10 ` [PATCH 03/22] clk: tests: Add reference to the orphan mux bug report Maxime Ripard
2022-04-08  9:10 ` [PATCH 04/22] clk: tests: Add tests for uncached clock Maxime Ripard
2022-04-08  9:10 ` [PATCH 05/22] clk: tests: Add tests for single parent mux Maxime Ripard
2022-04-08  9:10 ` [PATCH 06/22] clk: tests: Add tests for mux with multiple parents Maxime Ripard
2022-04-08  9:10 ` [PATCH 07/22] clk: tests: Add some tests for orphan " Maxime Ripard
2022-04-08  9:10 ` [PATCH 08/22] clk: Take into account uncached clocks in clk_set_rate_range() Maxime Ripard
2022-04-08  9:10 ` [PATCH 09/22] clk: Fix clk_get_parent() documentation Maxime Ripard
2022-04-08  9:10 ` [PATCH 10/22] clk: Set req_rate on reparenting Maxime Ripard
2022-04-08  9:10 ` [PATCH 11/22] clk: Skip set_rate_range if our clock is orphan Maxime Ripard
2022-04-08  9:10 ` [PATCH 12/22] clk: Add our request boundaries in clk_core_init_rate_req Maxime Ripard
2022-04-08  9:10 ` [PATCH 13/22] clk: Change clk_core_init_rate_req prototype Maxime Ripard
2022-04-08  9:10 ` [PATCH 14/22] clk: Introduce clk_hw_init_rate_request() Maxime Ripard
2022-04-23  3:46   ` Stephen Boyd
2022-04-23  7:17     ` Maxime Ripard
2022-04-08  9:10 ` [PATCH 15/22] clk: Add missing clk_core_init_rate_req calls Maxime Ripard
2022-04-23  3:51   ` Stephen Boyd
2022-04-23  7:32     ` Maxime Ripard
2022-04-08  9:10 ` Maxime Ripard [this message]
2022-04-23  4:02   ` [PATCH 16/22] clk: Remove redundant clk_core_init_rate_req() call Stephen Boyd
2022-04-23  7:44     ` Maxime Ripard
2022-04-08  9:10 ` [PATCH 17/22] clk: Switch from __clk_determine_rate to clk_core_round_rate_nolock Maxime Ripard
2022-04-08  9:10 ` [PATCH 18/22] clk: Introduce clk_core_has_parent() Maxime Ripard
2022-04-08  9:10 ` [PATCH 19/22] clk: Stop forwarding clk_rate_requests to the parent Maxime Ripard
2022-04-08  9:10 ` [PATCH 20/22] clk: Zero the clk_rate_request structure Maxime Ripard
2022-04-08  9:10 ` [PATCH 21/22] clk: Test the clock pointer in clk_hw_get_name() Maxime Ripard
2022-04-08  9:10 ` [PATCH 22/22] clk: Prevent a clock without a rate to register Maxime Ripard
2022-04-08  9:18   ` Jerome Brunet
2022-04-08 10:41     ` Maxime Ripard
2022-04-08 11:24       ` Jerome Brunet
2022-04-08 12:55         ` Maxime Ripard
2022-04-08 14:48           ` Jerome Brunet
2022-04-08 15:36             ` Maxime Ripard
2022-04-11  7:40               ` Neil Armstrong
2022-04-12 12:56                 ` Maxime Ripard
2022-04-11  8:20               ` Jerome Brunet
2022-04-23  4:42       ` Stephen Boyd
2022-04-23  9:17         ` Maxime Ripard
2022-04-29  2:08           ` Stephen Boyd
2022-04-29 15:45             ` Maxime Ripard
2022-04-08 12:17     ` Marek Szyprowski
2022-04-08 12:25       ` Maxime Ripard
2022-04-08 13:46         ` Marek Szyprowski
2022-04-23  4:12   ` Stephen Boyd
2022-04-23  7:49     ` Maxime Ripard
2022-04-10 12:06 ` [PATCH 00/22] clk: More clock rate fixes and tests Yassine Oudjana
2022-04-11 11:39   ` Maxime Ripard
2022-04-11  6:25 ` (EXT) " Alexander Stein
2022-04-11  7:24   ` Alexander Stein
2022-04-11 11:54     ` Maxime Ripard

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