From 1f3b69b6b939d870c22182d29e1b357ba6c9a0ed Mon Sep 17 00:00:00 2001 From: "Gustavo A. R. Silva" Date: Wed, 29 May 2019 11:20:14 -0500 Subject: i2c: mux: Use struct_size() in devm_kzalloc() One of the more common cases of allocation size calculations is finding the size of a structure that has a zero-sized array at the end, along with memory for some number of elements for that array. For example: struct foo { int stuff; struct boo entry[]; }; instance = devm_kzalloc(dev, sizeof(struct foo) + count * sizeof(struct boo), GFP_KERNEL); Instead of leaving these open-coded and prone to type mistakes, we can now use the new struct_size() helper: instance = devm_kzalloc(dev, struct_size(instance, entry, count), GFP_KERNEL); This code was detected with the help of Coccinelle. Signed-off-by: Gustavo A. R. Silva Signed-off-by: Peter Rosin --- drivers/i2c/i2c-mux.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'drivers/i2c/i2c-mux.c') diff --git a/drivers/i2c/i2c-mux.c b/drivers/i2c/i2c-mux.c index 603252fa1284..8d5e4c6fdd8e 100644 --- a/drivers/i2c/i2c-mux.c +++ b/drivers/i2c/i2c-mux.c @@ -243,8 +243,7 @@ struct i2c_mux_core *i2c_mux_alloc(struct i2c_adapter *parent, { struct i2c_mux_core *muxc; - muxc = devm_kzalloc(dev, sizeof(*muxc) - + max_adapters * sizeof(muxc->adapter[0]) + muxc = devm_kzalloc(dev, struct_size(muxc, adapter, max_adapters) + sizeof_priv, GFP_KERNEL); if (!muxc) return NULL; -- cgit v1.2.1