Commit cdcb5d19 authored Oct 03, 2023 by Linus Torvalds

regmap

Pull regmap fix from Mark Brown:
 "A fix for a long standing issue where when we create a new node in an
  rbtree register cache we were failing to convert the register address
  of the new register into a bitmask correctly and marking the wrong
  register as being present in the newly created node.

  This would only have affected devices with a register stride other
  than 1 but would corrupt data on those devices"

* tag 'regmap-fix-v6.6-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
  regmap: rbtree: Fix wrong register marked as in-cache when creating new node

parents 5e62ed3b 7a795ac8

drivers/base/regmap/regcache-rbtree.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -453,7 +453,8 @@ static int regcache_rbtree_write(struct regmap *map, unsigned int reg,
		if (!rbnode)
		return -ENOMEM;
		regcache_rbtree_set_register(map, rbnode,
		reg - rbnode->base_reg, value);
		(reg - rbnode->base_reg) / map->reg_stride,
		value);
		regcache_rbtree_insert(map, &rbtree_ctx->root, rbnode);
		rbtree_ctx->cached_rbnode = rbnode;
		}