Andy Shevchenko a1d594e6e7 regmap: spi: Fix potential off-by-one when calculating reserved size ...

[ Upstream commit d4ea1d504d ]

If we ever meet a hardware that uses weird register bits and padding,
we may end up in off-by-one error since x/8 + y/8 might not be equal
to (x + y)/8 in some cases.

bits    pad   x/8+y/8 (x+y)/8
4..7    0..3    0       0 // x + y from 4 up to 7
4..7    4..7    0       1 // x + y from 8 up to 11
4..7    8..11   1       1 // x + y from 12 up to 15
8..15   0..7    1       1 // x + y from 8 up to 15
8..15   8..15   2       2 // x + y from 16 up to 23

Fix this by using (x+y)/8.

Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://msgid.link/r/20240605205315.19132-1-andy.shevchenko@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2024-09-08 07:53:10 +02:00

..

internal.h

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Kconfig

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Makefile

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regcache-flat.c

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regcache-lzo.c

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regcache-rbtree.c

regmap: rbtree: Fix wrong register marked as in-cache when creating new node

2023-10-10 22:00:41 +02:00

regcache.c

regmap: fix bogus error on regcache_sync success

2023-12-13 18:39:20 +01:00

regmap-ac97.c

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regmap-debugfs.c

regmap: debugfs: Fix a erroneous check after snprintf()

2023-11-20 11:51:55 +01:00

regmap-i2c.c

regmap-i2c: Subtract reg size from max_write

2024-07-11 12:47:17 +02:00

regmap-i3c.c

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regmap-irq.c

regmap-irq: Fix out-of-bounds access when allocating config buffers

2023-07-23 13:49:44 +02:00

regmap-mdio.c

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regmap-mmio.c

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regmap-sccb.c

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regmap-sdw-mbq.c

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regmap-sdw.c

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regmap-slimbus.c

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regmap-spi-avmm.c

regmap: Drop initial version of maximum transfer length fixes

2023-07-27 08:50:26 +02:00

regmap-spi.c

regmap: spi: Fix potential off-by-one when calculating reserved size

2024-09-08 07:53:10 +02:00

regmap-spmi.c

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regmap-w1.c

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regmap.c

regmap: prevent noinc writes from clobbering cache

2023-11-20 11:52:15 +01:00

trace.h

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