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regmap: fix page selection for noinc reads 

Non-incrementing reads can fail if register + length crosses page
border. However for non-incrementing reads we should not check for page
border crossing. Fix this by passing additional flag to _regmap_raw_read
and passing length to _regmap_select_page basing on the flag.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Fixes: 74fe7b551f ("regmap: Add regmap_noinc_read API")
Link: https://lore.kernel.org/r/20200917153405.3139200-1-dmitry.baryshkov@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
zero-sugar-mainline-defconfig
Dmitry Baryshkov 2020-09-17 18:34:04 +03:00 committed by Mark Brown
parent d36cb0205f
commit 4003324856
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 6 additions and 6 deletions
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12
drivers/base/regmap/regmap.c
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@ -2472,7 +2472,7 @@ int regmap_raw_write_async(struct regmap *map, unsigned int reg,
EXPORT_SYMBOL_GPL(regmap_raw_write_async);
static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
unsigned int val_len)
unsigned int val_len, bool noinc)
{
struct regmap_range_node *range;
int ret;
@ -2485,7 +2485,7 @@ static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
range = _regmap_range_lookup(map, reg);
if (range) {
ret = _regmap_select_page(map, &reg, range,
val_len / map->format.val_bytes);
noinc ? 1 : val_len / map->format.val_bytes);
if (ret != 0)
return ret;
}
@ -2523,7 +2523,7 @@ static int _regmap_bus_read(void *context, unsigned int reg,
if (!map->format.parse_val)
return -EINVAL;
ret = _regmap_raw_read(map, reg, work_val, map->format.val_bytes);
ret = _regmap_raw_read(map, reg, work_val, map->format.val_bytes, false);
if (ret == 0)
*val = map->format.parse_val(work_val);
@ -2639,7 +2639,7 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
/* Read bytes that fit into whole chunks */
for (i = 0; i < chunk_count; i++) {
ret = _regmap_raw_read(map, reg, val, chunk_bytes);
ret = _regmap_raw_read(map, reg, val, chunk_bytes, false);
if (ret != 0)
goto out;
@ -2650,7 +2650,7 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
/* Read remaining bytes */
if (val_len) {
ret = _regmap_raw_read(map, reg, val, val_len);
ret = _regmap_raw_read(map, reg, val, val_len, false);
if (ret != 0)
goto out;
}
@ -2725,7 +2725,7 @@ int regmap_noinc_read(struct regmap *map, unsigned int reg,
read_len = map->max_raw_read;
else
read_len = val_len;
ret = _regmap_raw_read(map, reg, val, read_len);
ret = _regmap_raw_read(map, reg, val, read_len, true);
if (ret)
goto out_unlock;
val = ((u8 *)val) + read_len;