Use the `DEFINE_FLEX()` helper for an on-stack definition of a flexible structure where the size of the flexible-array member is known at compile-time, and refactor the rest of the code, accordingly.

So, with these changes, fix the following warning: sound/firewire/amdtp-stream.c:1184:46: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]

Link: https://github.com/KSPP/linux/issues/202 Signed-off-by: Gustavo A. R. Silva gustavoars@kernel.org --- Changes in v2: - Use DEFINE_FLEX() helper instead of a new tagged struct.

v1: - Link: https://lore.kernel.org/linux-hardening/d3a764eb76909b16b8a22d9ff530e5edf0e5...

sound/firewire/amdtp-stream.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c index c9f153f85ae6..d35d0a420ee0 100644 --- a/sound/firewire/amdtp-stream.c +++ b/sound/firewire/amdtp-stream.c @@ -1180,13 +1180,11 @@ static void process_rx_packets(struct fw_iso_context *context, u32 tstamp, size_ (void)fw_card_read_cycle_time(fw_parent_device(s->unit)->card, &curr_cycle_time);

for (i = 0; i < packets; ++i) { - struct { - struct fw_iso_packet params; - __be32 header[CIP_HEADER_QUADLETS]; - } template = { {0}, {0} }; + DEFINE_FLEX(struct fw_iso_packet, template, header, + header_length, CIP_HEADER_QUADLETS); bool sched_irq = false;

- build_it_pkt_header(s, desc->cycle, &template.params, pkt_header_length, + build_it_pkt_header(s, desc->cycle, template, pkt_header_length, desc->data_blocks, desc->data_block_counter, desc->syt, i, curr_cycle_time);

@@ -1198,7 +1196,7 @@ static void process_rx_packets(struct fw_iso_context *context, u32 tstamp, size_ } }

- if (queue_out_packet(s, &template.params, sched_irq) < 0) { + if (queue_out_packet(s, template, sched_irq) < 0) { cancel_stream(s); return; }