ofnode_read_simple_addr_cells may fail and return a negative error code. Check for this when initializing regmaps.
Also check if both_len is zero, since this is perfectly possible, and would lead to a division-by-zero further down the line.
Reviewed-by: Anatolij Gustschin agust@denx.de Reviewed-by: Simon Glass sjg@chromium.org Signed-off-by: Mario Six mario.six@gdsys.cc
---
v3 -> v4: No changes
v2 -> v3: New in v3
--- drivers/core/regmap.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)
diff --git a/drivers/core/regmap.c b/drivers/core/regmap.c index 77f6f520a06..4ebab233490 100644 --- a/drivers/core/regmap.c +++ b/drivers/core/regmap.c @@ -67,8 +67,25 @@ int regmap_init_mem(ofnode node, struct regmap **mapp) struct resource r;
addr_len = ofnode_read_simple_addr_cells(ofnode_get_parent(node)); + if (addr_len < 0) { + debug("%s: Error while reading the addr length (ret = %d)\n", + ofnode_get_name(node), addr_len); + return addr_len; + } + size_len = ofnode_read_simple_size_cells(ofnode_get_parent(node)); + if (size_len < 0) { + debug("%s: Error while reading the size length: (ret = %d)\n", + ofnode_get_name(node), size_len); + return size_len; + } + both_len = addr_len + size_len; + if (!both_len) { + debug("%s: Both addr and size length are zero\n", + ofnode_get_name(node)); + return -EINVAL; + }
len = ofnode_read_size(node, "reg"); if (len < 0) -- 2.11.0