From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
"Thierry Reding" <thierry.reding@gmail.com>,
"Sasha Levin" <sashal@kernel.org>,
lee.jones@linaro.org, heiko@sntech.de
Subject: [PATCH AUTOSEL 5.14 12/21] pwm: rockchip: Don't modify HW state in .remove() callback
Date: Thu, 16 Sep 2021 22:33:06 -0400 [thread overview]
Message-ID: <20210917023315.816225-12-sashal@kernel.org> (raw)
In-Reply-To: <20210917023315.816225-1-sashal@kernel.org>
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
[ Upstream commit 9d768cd7fd42bb0be16f36aec48548fca5260759 ]
A consumer is expected to disable a PWM before calling pwm_put(). And if
they didn't there is hopefully a good reason (or the consumer needs
fixing). Also if disabling an enabled PWM was the right thing to do,
this should better be done in the framework instead of in each low level
driver.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/pwm/pwm-rockchip.c | 14 --------------
1 file changed, 14 deletions(-)
diff --git a/drivers/pwm/pwm-rockchip.c b/drivers/pwm/pwm-rockchip.c
index cbe900877724..8fcef29948d7 100644
--- a/drivers/pwm/pwm-rockchip.c
+++ b/drivers/pwm/pwm-rockchip.c
@@ -384,20 +384,6 @@ static int rockchip_pwm_remove(struct platform_device *pdev)
{
struct rockchip_pwm_chip *pc = platform_get_drvdata(pdev);
- /*
- * Disable the PWM clk before unpreparing it if the PWM device is still
- * running. This should only happen when the last PWM user left it
- * enabled, or when nobody requested a PWM that was previously enabled
- * by the bootloader.
- *
- * FIXME: Maybe the core should disable all PWM devices in
- * pwmchip_remove(). In this case we'd only have to call
- * clk_unprepare() after pwmchip_remove().
- *
- */
- if (pwm_is_enabled(pc->chip.pwms))
- clk_disable(pc->clk);
-
clk_unprepare(pc->pclk);
clk_unprepare(pc->clk);
--
2.30.2
next prev parent reply other threads:[~2021-09-17 2:34 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-17 2:32 [PATCH AUTOSEL 5.14 01/21] thermal/drivers/rcar_gen3_thermal: Store TSC id as unsigned int Sasha Levin
2021-09-17 2:32 ` [PATCH AUTOSEL 5.14 02/21] habanalabs: fix nullifying of destroyed mmu pgt pool Sasha Levin
2021-09-17 2:32 ` [PATCH AUTOSEL 5.14 03/21] habanalabs: fix race between soft reset and heartbeat Sasha Levin
2021-09-17 2:32 ` [PATCH AUTOSEL 5.14 04/21] drm/amdgpu: Fixes to returning VBIOS RAS EEPROM address Sasha Levin
2021-09-17 2:32 ` [PATCH AUTOSEL 5.14 05/21] drm/amd/display: Fix memory leak reported by coverity Sasha Levin
2021-09-17 2:33 ` [PATCH AUTOSEL 5.14 06/21] drm/amdgpu: fix fdinfo race with process exit Sasha Levin
2021-09-17 2:33 ` [PATCH AUTOSEL 5.14 07/21] habanalabs: add validity check for event ID received from F/W Sasha Levin
2021-09-17 2:33 ` [PATCH AUTOSEL 5.14 08/21] habanalabs: fix mmu node address resolution in debugfs Sasha Levin
2021-09-17 2:33 ` [PATCH AUTOSEL 5.14 09/21] habanalabs: add "in device creation" status Sasha Levin
2021-09-17 2:33 ` [PATCH AUTOSEL 5.14 10/21] habanalabs: cannot sleep while holding spinlock Sasha Levin
2021-09-17 2:33 ` [PATCH AUTOSEL 5.14 11/21] pwm: img: Don't modify HW state in .remove() callback Sasha Levin
2021-09-17 2:33 ` Sasha Levin [this message]
2021-09-17 2:33 ` [PATCH AUTOSEL 5.14 13/21] pwm: stm32-lp: " Sasha Levin
2021-09-17 2:33 ` [PATCH AUTOSEL 5.14 14/21] nvmet: fixup buffer overrun in nvmet_subsys_attr_serial() Sasha Levin
2021-09-17 2:33 ` [PATCH AUTOSEL 5.14 15/21] block: genhd: don't call blkdev_show() with major_names_lock held Sasha Levin
2021-09-17 2:33 ` [PATCH AUTOSEL 5.14 16/21] blk-throttle: fix UAF by deleteing timer in blk_throtl_exit() Sasha Levin
2021-09-17 2:33 ` [PATCH AUTOSEL 5.14 17/21] blk-mq: allow 4x BLK_MAX_REQUEST_COUNT at blk_plug for multiple_queues Sasha Levin
2021-09-17 2:33 ` [PATCH AUTOSEL 5.14 18/21] rtc: rx8010: select REGMAP_I2C Sasha Levin
2021-09-17 2:33 ` [PATCH AUTOSEL 5.14 19/21] sched/idle: Make the idle timer expire in hard interrupt context Sasha Levin
2021-09-17 2:33 ` [PATCH AUTOSEL 5.14 20/21] cifs: properly invalidate cached root handle when closing it Sasha Levin
2021-09-17 2:33 ` [PATCH AUTOSEL 5.14 21/21] io_uring: fix off-by-one in BUILD_BUG_ON check of __REQ_F_LAST_BIT Sasha Levin
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