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ASoC: SOF: topology: Use struct_size() helper

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Make use of the struct_size() helper instead of an open-coded version
in order to avoid any potential type mistakes, in particular in the
context in which this code is being used.

So, replace the following form:

sizeof(struct sof_ipc_ctrl_data) + sizeof(struct sof_ipc_ctrl_value_chan) *
	le32_to_cpu(mc->num_channels)

with:

struct_size(scontrol->control_data, chanv, le32_to_cpu(mc->num_channels))

and so on...

This code was detected with the help of Coccinelle.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Gustavo A. R. Silva 2019-05-24 11:10:51 -05:00 committed by Mark Brown
parent 9b33d2e526
commit 41f4fadb34
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GPG Key ID: 24D68B725D5487D0
1 changed files with 4 additions and 6 deletions
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10
sound/soc/sof/topology.c
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@ -442,9 +442,8 @@ static int sof_control_load_volume(struct snd_soc_component *scomp,
return -EINVAL;
/* init the volume get/put data */
scontrol->size = sizeof(struct sof_ipc_ctrl_data) +
sizeof(struct sof_ipc_ctrl_value_chan) *
le32_to_cpu(mc->num_channels);
scontrol->size = struct_size(scontrol->control_data, chanv,
le32_to_cpu(mc->num_channels));
scontrol->control_data = kzalloc(scontrol->size, GFP_KERNEL);
if (!scontrol->control_data)
return -ENOMEM;
@ -501,9 +500,8 @@ static int sof_control_load_enum(struct snd_soc_component *scomp,
return -EINVAL;
/* init the enum get/put data */
scontrol->size = sizeof(struct sof_ipc_ctrl_data) +
sizeof(struct sof_ipc_ctrl_value_chan) *
le32_to_cpu(ec->num_channels);
scontrol->size = struct_size(scontrol->control_data, chanv,
le32_to_cpu(ec->num_channels));
scontrol->control_data = kzalloc(scontrol->size, GFP_KERNEL);
if (!scontrol->control_data)
return -ENOMEM;