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authorGustavo A. R. Silva <gustavoars@kernel.org>2021-09-29 14:15:04 -0500
committerTakashi Iwai <tiwai@suse.de>2021-09-30 13:47:57 +0200
commitb38269ecd2b2bdd63780b3f7d43c39f924ac515a (patch)
treec6ac4ab68c8bddc30d39468152ea8401efd9be09 /sound/virtio
parenta20f3b10de61add5e14b6ce4df982f4df2a4cbbc (diff)
ALSA: virtio: Replace zero-length array with flexible-array member
There is a regular need in the kernel to provide a way to declare having a dynamically sized set of trailing elements in a structure. Kernel code should always use “flexible array members”[1] for these cases. The older style of one-element or zero-length arrays should no longer be used[2]. Also, make use of the struct_size() helper in kzalloc(). [1] https://en.wikipedia.org/wiki/Flexible_array_member [2] https://www.kernel.org/doc/html/v5.10/process/deprecated.html#zero-length-and-one-element-arrays Link: https://github.com/KSPP/linux/issues/78 Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Link: https://lore.kernel.org/r/20210929191504.GA337268@embeddedor Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/virtio')
-rw-r--r--sound/virtio/virtio_pcm_msg.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/sound/virtio/virtio_pcm_msg.c b/sound/virtio/virtio_pcm_msg.c
index f88c8f29cbd8..aca2dc1989ba 100644
--- a/sound/virtio/virtio_pcm_msg.c
+++ b/sound/virtio/virtio_pcm_msg.c
@@ -20,7 +20,7 @@ struct virtio_pcm_msg {
struct virtio_snd_pcm_xfer xfer;
struct virtio_snd_pcm_status status;
size_t length;
- struct scatterlist sgs[0];
+ struct scatterlist sgs[];
};
/**
@@ -146,8 +146,7 @@ int virtsnd_pcm_msg_alloc(struct virtio_pcm_substream *vss,
int sg_num = virtsnd_pcm_sg_num(data, period_bytes);
struct virtio_pcm_msg *msg;
- msg = kzalloc(sizeof(*msg) + sizeof(*msg->sgs) * (sg_num + 2),
- GFP_KERNEL);
+ msg = kzalloc(struct_size(msg, sgs, sg_num + 2), GFP_KERNEL);
if (!msg)
return -ENOMEM;