Mark Brown 0cc6578048 regmap: maple: Drop the RCU read lock while syncing registers ...

Unfortunately the maple tree requires us to explicitly lock it so we need
to take the RCU read lock while iterating. When syncing this means that we
end up trying to write out register values while holding the RCU read lock
which triggers lockdep issues since that is an atomic context but most
buses can't be used in atomic context. Pause the iteration and drop the
lock for each register we check to avoid this.

Reported-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Tested-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230523-regcache-maple-sync-lock-v1-1-530e4d68dfab@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>

2023-05-24 11:21:52 +01:00

..

internal.h

regmap: allow upshifting register addresses before performing operations

2023-04-07 17:28:19 +01:00

Kconfig

regmap: REGMAP_KUNIT should not select REGMAP

2023-05-08 09:07:51 +09:00

Makefile

regmap: Add maple tree based register cache

2023-04-03 12:53:44 +01:00

regcache-flat.c

regmap: add proper SPDX identifiers on files that did not have them.

2019-04-25 20:22:15 +01:00

regcache-maple.c

regmap: maple: Drop the RCU read lock while syncing registers

2023-05-24 11:21:52 +01:00

regcache-rbtree.c

regmap: Fix possible double-free in regcache_rbtree_exit()

2021-10-12 11:48:43 +01:00

regcache.c

regmap: Add maple tree based register cache

2023-04-03 12:53:44 +01:00

regmap-ac97.c

regmap: add proper SPDX identifiers on files that did not have them.

2019-04-25 20:22:15 +01:00

regmap-debugfs.c

mm, treewide: redefine MAX_ORDER sanely

2023-04-05 19:42:46 -07:00

regmap-fsi.c

regmap: Add FSI bus support

2022-11-25 19:17:02 +00:00

regmap-i2c.c

regmap-i2c: Set regmap max raw r/w from quirks

2021-05-14 13:25:03 +01:00

regmap-i3c.c

regmap: Constify static regmap_bus structs

2022-04-04 08:41:50 +01:00

regmap-irq.c

Migrate the PCIe-IDIO-24 and WS16C48 GPIO drivers

2023-04-05 21:56:44 +01:00

regmap-kunit.c

regmap: Add maple tree based register cache

2023-04-03 12:53:44 +01:00

regmap-mdio.c

regmap: Rework regmap_mdio_c45_{read|write} for new C45 API.

2023-01-16 13:16:09 +00:00

regmap-mmio.c

regmap: mmio: replace return 0 with break in switch statement

2022-09-22 12:33:18 +01:00

regmap-ram.c

regmap: Add RAM backed register map

2023-03-30 12:25:42 +01:00

regmap-sccb.c

regmap: Constify static regmap_bus structs

2022-04-04 08:41:50 +01:00

regmap-sdw-mbq.c

regmap: Constify static regmap_bus structs

2022-04-04 08:41:50 +01:00

regmap-sdw.c

regmap: sdw: check for invalid multi-register writes config

2023-05-24 11:21:51 +01:00

regmap-slimbus.c

regmap: Constify static regmap_bus structs

2022-04-04 08:41:50 +01:00

regmap-spi-avmm.c

regmap: spi-avmm: Use swabXX_array() helpers

2022-09-07 12:42:27 +01:00

regmap-spi.c

regmap: spi: Reserve space for register address/padding

2022-08-18 15:02:05 +01:00

regmap-spmi.c

regmap: add proper SPDX identifiers on files that did not have them.

2019-04-25 20:22:15 +01:00

regmap-w1.c

regmap: Constify static regmap_bus structs

2022-04-04 08:41:50 +01:00

regmap.c

regmap: Account for register length when chunking

2023-05-18 10:53:42 +09:00

trace.h

regmap: trace: Remove unneeded blank lines

2022-09-05 13:09:45 +01:00