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

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 9b4badc2479d..c0aeda553c18 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -2184,6 +2184,11 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
 
         if (regmap_volatile_range(map, reg, val_count) || map->cache_bypass ||
             map->cache_type == REGCACHE_NONE) {
+                if (!map->bus->read) {
+                        ret = -ENOTSUPP;
+                        goto out;
+                }
+
                 /* Physical block read if there's no cache involved */
                 ret = _regmap_raw_read(map, reg, val, val_len);