Uwe Kleine-König 6f4f778f27 pwm: lpc18xx-sct: Initialize driver data and hardware before pwmchip_add() ...

[ Upstream commit 0401f24cd2 ]

When a driver calls pwmchip_add() it has to be prepared to immediately
get its callbacks called. So move allocation of driver data and hardware
initialization before the call to pwmchip_add().

This fixes a potential NULL pointer exception and a race condition on
register writes.

Fixes: 841e6f90bb ("pwm: NXP LPC18xx PWM/SCT 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>

2022-04-08 14:23:44 +02:00

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core.c

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Kconfig

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Makefile

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pwm-ab8500.c

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pwm-atmel-hlcdc.c

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pwm-atmel-tcb.c

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pwm-atmel.c

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pwm-bcm2835.c

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pwm-bcm-iproc.c

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pwm-bcm-kona.c

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pwm-berlin.c

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pwm-brcmstb.c

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pwm-clps711x.c

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pwm-crc.c

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pwm-cros-ec.c

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pwm-dwc.c

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pwm-ep93xx.c

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pwm-fsl-ftm.c

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pwm-hibvt.c

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pwm-img.c

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pwm-imx1.c

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pwm-imx27.c

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pwm-imx-tpm.c

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pwm-intel-lgm.c

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pwm-iqs620a.c

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pwm-jz4740.c

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pwm-keembay.c

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pwm-lp3943.c

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pwm-lpc18xx-sct.c

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pwm-lpc32xx.c

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pwm-lpss-pci.c

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pwm-lpss-platform.c

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pwm-lpss.c

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pwm-lpss.h

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pwm-mediatek.c

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pwm-meson.c

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pwm-mtk-disp.c

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pwm-mxs.c

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pwm-ntxec.c

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pwm-omap-dmtimer.c

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pwm-pca9685.c

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pwm-pxa.c

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pwm-raspberrypi-poe.c

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pwm-rcar.c

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pwm-renesas-tpu.c

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pwm-rockchip.c

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pwm-samsung.c

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pwm-sifive.c

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pwm-sl28cpld.c

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pwm-spear.c

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pwm-sprd.c

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pwm-sti.c

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pwm-stm32-lp.c

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pwm-stm32.c

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pwm-stmpe.c

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pwm-sun4i.c

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pwm-tegra.c

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pwm-tiecap.c

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pwm-tiehrpwm.c

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pwm-twl-led.c

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pwm-twl.c

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pwm-visconti.c

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pwm-vt8500.c

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sysfs.c

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