The patch
regmap: fix bulk writes on paged registers
has been applied to the regmap tree at
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap.git for-5.2
All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.
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Thanks, Mark
From db057679de3e9e6a03c1bcd5aee09b0d25fd9f5b Mon Sep 17 00:00:00 2001
From: Srinivas Kandagatla srinivas.kandagatla@linaro.org Date: Wed, 12 Jun 2019 12:03:43 +0100 Subject: [PATCH] regmap: fix bulk writes on paged registers
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 srinivas.kandagatla@linaro.org Signed-off-by: Mark Brown broonie@kernel.org --- drivers/base/regmap/regmap.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index f1025452bb39..19f57ccfbe1d 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -1637,6 +1637,8 @@ static int _regmap_raw_write_impl(struct regmap *map, unsigned int reg, map->format.reg_bytes + map->format.pad_bytes, val, val_len); + else + ret = -ENOTSUPP;
/* If that didn't work fall back on linearising by hand. */ if (ret == -ENOTSUPP) {