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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 <gustavo@embeddedor.com> Signed-off-by: Peter Rosin <peda@axentia.se>
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1 changed files with 1 additions and 2 deletions
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@ -243,8 +243,7 @@ struct i2c_mux_core *i2c_mux_alloc(struct i2c_adapter *parent,
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{
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struct i2c_mux_core *muxc;
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muxc = devm_kzalloc(dev, sizeof(*muxc)
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+ max_adapters * sizeof(muxc->adapter[0])
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muxc = devm_kzalloc(dev, struct_size(muxc, adapter, max_adapters)
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+ sizeof_priv, GFP_KERNEL);
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if (!muxc)
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return NULL;
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