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| author |   Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2020-09-17 18:34:04 +0300 |
|---|---|---|
| committer |   Mark Brown <broonie@kernel.org> | 2020-09-21 20:58:01 +0100 |
| commit | 4003324856311faebb46cbd56a1616bd3f3b67c2 (patch) | |
| tree | bdd828476621322c7587a64f9fafdd7ec1b69ef5 /drivers/base/regmap | |
| parent | regmap: debugfs: Add back in erroneously removed initialisation of ret (diff) | |
| download | linux-dev-4003324856311faebb46cbd56a1616bd3f3b67c2.tar.xz linux-dev-4003324856311faebb46cbd56a1616bd3f3b67c2.zip | |
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: 74fe7b551f33 ("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>
Diffstat (limited to 'drivers/base/regmap')
| -rw-r--r-- | drivers/base/regmap/regmap.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 388ff8a6816c..e2822dc21022 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -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, ®, 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; |