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| author | Mark Brown <broonie@kernel.org> | 2016-02-01 22:09:14 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-02-01 22:11:38 +0100 |
| commit | bb2bb45d1be28987e6cb50f50e4819795537ab83 (patch) | |
| tree | fe74c7504043119b2f4f1ba67adf8d8ef224f220 | |
| parent | regmap: mmio: Convert to regmap_bus and fix accessor usage (diff) | |
| download | linux-bb2bb45d1be28987e6cb50f50e4819795537ab83.tar.xz linux-bb2bb45d1be28987e6cb50f50e4819795537ab83.zip | |
regmap: Return an error if a caller attempts to do an unsupported raw read
regmaps without raw I/O access can't implement raw I/O operations,
return an error if someone tries to do that rather than crashing.
Signed-off-by: Mark Brown <broonie@kernel.org>
| -rw-r--r-- | drivers/base/regmap/regmap.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 343263449aff..e2f68807d970 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -2255,6 +2255,9 @@ static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val, WARN_ON(!map->bus); + if (!map->bus || !map->bus->read) + return -EINVAL; + range = _regmap_range_lookup(map, reg); if (range) { ret = _regmap_select_page(map, ®, range, |