nvmem: core: validate nvmem config before parsing

nvmem provider has to provide either reg_read/write, add a check to enforce this. Signed-off-by: Srinivas Kandagatla <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>
mrcsosa · Mar 19, 2020 · 061a320 · 061a320
1 parent a9c3766
commit 061a320
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
@@ -339,6 +339,9 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config)
 	if (!config->dev)
 		return ERR_PTR(-EINVAL);
 
+	if (!config->reg_read && !config->reg_write)
+		return ERR_PTR(-EINVAL);
+
 	nvmem = kzalloc(sizeof(*nvmem), GFP_KERNEL);
 	if (!nvmem)
 		return ERR_PTR(-ENOMEM);