mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-13 14:46:53 +07:00
0e76597128
The extcon driver takes the DAPM mutex from within the interrupt thread in several places, which makes it possible to get into a situation where the interrupt thread is blocked waiting on the DAPM mutex whilst a DAPM sequence is running which is attempting to configure the FLL. In this case the FLL completion can't be completed as as the IRQ handler is ONE_SHOT, which cause the FLL lock to use the full time out (250mS) and report that the process timed out. It is not really practical to make the extcon driver not take the DAPM mutex from within the interrupt thread, at least not without extensive modification. So this patch fixes the issue by switching the wait for the FLL lock to polling. A few fast polls are done first as the FLL should lock quickly for a good quality reference clock, (indeed it hits on the first poll on my system) and it will poll every 20mS after that until it times out. Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Signed-off-by: Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org |
||
|---|---|---|
| .. | ||
| aoa | ||
| arm | ||
| atmel | ||
| core | ||
| drivers | ||
| firewire | ||
| hda | ||
| i2c | ||
| isa | ||
| mips | ||
| oss | ||
| parisc | ||
| pci | ||
| pcmcia | ||
| ppc | ||
| sh | ||
| soc | ||
| sparc | ||
| spi | ||
| synth | ||
| usb | ||
| ac97_bus.c | ||
| Kconfig | ||
| last.c | ||
| Makefile | ||
| sound_core.c | ||
| sound_firmware.c | ||