kernel/linux.git/drivers/base/regmap/regmap.c, branch v4.4.296

regmap: dev_get_regmap_match(): fix string comparison

2020-07-31T14:43:13+00:00

[ Upstream commit e84861fec32dee8a2e62bbaa52cded6b05a2a456 ] This function is used by dev_get_regmap() to retrieve a regmap for the specified device. If the device has more than one regmap, the name parameter can be used to specify one. The code here uses a pointer comparison to check for equal strings. This however will probably always fail, as the regmap->name is allocated via kstrdup_const() from the regmap's config->name. Fix this by using strcmp() instead. Signed-off-by: Marc Kleine-Budde Link: https://lore.kernel.org/r/20200703103315.267996-1-mkl@pengutronix.de Signed-off-by: Mark Brown Signed-off-by: Sasha Levin

regmap: fix bulk writes on paged registers

2019-08-04T07:34:46+00:00

[ Upstream commit db057679de3e9e6a03c1bcd5aee09b0d25fd9f5b ] On buses like SlimBus and SoundWire which does not support gather_writes yet in regmap, A bulk write on paged register would be silently ignored after programming page. This is because local variable 'ret' value in regmap_raw_write_impl() gets reset to 0 once page register is written successfully and the code below checks for 'ret' value to be -ENOTSUPP before linearising the write buffer to send to bus->write(). Fix this by resetting the 'ret' value to -ENOTSUPP in cases where gather_writes() is not supported or single register write is not possible. Signed-off-by: Srinivas Kandagatla Signed-off-by: Mark Brown Signed-off-by: Sasha Levin

regmap: Fix reversed bounds check in regmap_raw_write()

2018-04-24T07:32:06+00:00

commit f00e71091ab92eba52122332586c6ecaa9cd1a56 upstream. We're supposed to be checking that "val_len" is not too large but instead we check if it is smaller than the max. The only function affected would be regmap_i2c_smbus_i2c_write() in drivers/base/regmap/regmap-i2c.c. Strangely that function has its own limit check which returns an error if (count >= I2C_SMBUS_BLOCK_MAX) so it doesn't look like it has ever been able to do anything except return an error. Fixes: c335931ed9d2 ("regmap: Add raw_write/read checks for max_raw_write/read sizes") Signed-off-by: Dan Carpenter Signed-off-by: Mark Brown Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman

Merge remote-tracking branches 'regmap/topic/atomic', 'regmap/topic/debugfs' and 'regmap/topic/irq-hdr' into regmap-next

2015-10-12T18:25:07+00:00

regmap: Allow installing custom reg_update_bits function

2015-10-06T15:12:34+00:00

This commit allows installing a custom reg_update_bits function for cases where the hardware provides a mechanism to set or clear register bits without a read/modify/write cycle. Such is the case with the Microchip ENCX24J600. If a custom reg_update_bits function is provided, it will only be used against volatile registers. Signed-off-by: Jon Ringle Signed-off-by: Mark Brown

regmap: Allocate buffers with GFP_ATOMIC when fast_io == true

2015-09-14T18:49:26+00:00

If a regmap is using fast_io, allocate the scratch buffer in regmap_bulk_write() with GFP_ATOMIC instead of GFP_KERNEL. Otherwise we may schedule while atomic. Reported-by: Abhijeet Dharmapurikar Signed-off-by: Stephen Boyd Signed-off-by: Mark Brown

Merge remote-tracking branches 'regmap/topic/lockdep' and 'regmap/topic/seq-delay' into regmap-next

2015-09-04T16:22:10+00:00

Merge remote-tracking branches 'regmap/topic/debugfs' and 'regmap/topic/force-update' into regmap-next

2015-09-04T16:22:09+00:00

Merge remote-tracking branch 'regmap/topic/core' into regmap-next

2015-09-04T16:22:08+00:00

Merge remote-tracking branch 'regmap/fix/raw' into regmap-linus

2015-09-04T16:22:07+00:00