[PATCH v4] mfd: twl-core: Embed the twl_client array in twl_private

[Rosen Penev]

At most four I2C slave addresses are ever used (TWL4030 class), so
there is no need to allocate the twl_client array separately. Embed a
fixed array of TWL_MAX_SLAVES entries in struct twl_private and drop the
extra devm_kcalloc() and its error handling.

Signed-off-by: Rosen Penev <rosenp@xxxxxxxxx>
---
 v4: use a static array
 v3: Capitalize Allocate.
 v2: don't use twl_get_num_slaves().
 drivers/mfd/twl-core.c | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/drivers/mfd/twl-core.c b/drivers/mfd/twl-core.c
index f86df356d658..4f70d49ed2f0 100644
--- a/drivers/mfd/twl-core.c
+++ b/drivers/mfd/twl-core.c
@@ -153,13 +153,15 @@ struct twl_mapping {
 	unsigned char base;	/* base address */
 };
 
+#define TWL_MAX_SLAVES	4
+
 struct twl_private {
 	bool ready; /* The core driver is ready to be used */
 	u32 twl_idcode; /* TWL IDCODE Register value */
 	unsigned int twl_id;
 
 	struct twl_mapping *twl_map;
-	struct twl_client *twl_modules;
+	struct twl_client twl_modules[TWL_MAX_SLAVES];
 };
 
 static struct twl_private *twl_priv;
@@ -788,15 +790,6 @@ twl_probe(struct i2c_client *client)
 	}
 
 	num_slaves = twl_get_num_slaves();
-	twl_priv->twl_modules = devm_kcalloc(&client->dev,
-					 num_slaves,
-					 sizeof(struct twl_client),
-					 GFP_KERNEL);
-	if (!twl_priv->twl_modules) {
-		status = -ENOMEM;
-		goto out;
-	}
-
 	for (i = 0; i < num_slaves; i++) {
 		struct twl_client *twl = &twl_priv->twl_modules[i];
 
-- 
2.56.0