extres: regulator: Fix regulator_status for already enable regulators

If a regulator hasn't been enable by a driver but is enabled in hardware
(most likely enabled by U-Boot), regulator_status will returns that it
is enabled and so any call to regulator_disable will panic as it wasn't
enabled by one of our drivers.

Sponsored by:	Diablotin Systems
Differential Revision:	https://reviews.freebsd.org/D30293

This commit is contained in:

Emmanuel Vadot

2021-05-16 16:21:43 +02:00

parent ce41765c21

commit f52072b06d

1 changed files with 4 additions and 0 deletions

									
										sys/dev/extres/regulator/regulator.c
									
		+4
		
												View File
												
				@@ -985,6 +985,10 @@ regulator_status(regulator_t reg, int *status)

					KASSERT(regnode->ref_cnt > 0,

					   ("Attempt to access unreferenced regulator: %s\n", regnode->name));

					if (reg->enable_cnt == 0) {

						*status = 0;

						return (0);

					}

					REG_TOPO_SLOCK();

					rv = regnode_status(regnode, status);

					REG_TOPO_UNLOCK();