[PATCH][next] wifi: iwlwifi: mvm: Avoid -Wflex-array-member-not-at-end warning

[Gustavo A. R. Silva]

-Wflex-array-member-not-at-end was introduced in GCC-14, and we are
getting ready to enable it, globally.

Use the `DEFINE_RAW_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:

drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c:6430:41: warning: structure 
containing a flexible array member is not at the end of another structure 
[-Wflex-array-member-not-at-end]

Signed-off-by: Gustavo A. R. Silva <gustavo...@kernel.org>
---
 .../net/wireless/intel/iwlwifi/mvm/mac80211.c | 25 +++++++++----------
 1 file changed, 12 insertions(+), 13 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c 
b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index 1e916a0ce082..5d8f50a455d7 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -6426,17 +6426,10 @@ void iwl_mvm_sync_rx_queues_internal(struct iwl_mvm 
*mvm,
                                     bool sync,
                                     const void *data, u32 size)
 {
-       struct {
-               struct iwl_rxq_sync_cmd cmd;
-               struct iwl_mvm_internal_rxq_notif notif;
-       } __packed cmd = {
-               .cmd.rxq_mask = cpu_to_le32(BIT(mvm->trans->num_rx_queues) - 1),
-               .cmd.count =
-                       cpu_to_le32(sizeof(struct iwl_mvm_internal_rxq_notif) +
-                                   size),
-               .notif.type = type,
-               .notif.sync = sync,
-       };
+       DEFINE_RAW_FLEX(struct iwl_rxq_sync_cmd, cmd, payload,
+                       sizeof(struct iwl_mvm_internal_rxq_notif));
+       struct iwl_mvm_internal_rxq_notif *notif =
+                       (struct iwl_mvm_internal_rxq_notif *)cmd->payload;
        struct iwl_host_cmd hcmd = {
                .id = WIDE_ID(DATA_PATH_GROUP, TRIGGER_RX_QUEUES_NOTIF_CMD),
                .data[0] = &cmd,
@@ -6447,15 +6440,21 @@ void iwl_mvm_sync_rx_queues_internal(struct iwl_mvm 
*mvm,
        };
        int ret;
 
+       cmd->rxq_mask = cpu_to_le32(BIT(mvm->trans->num_rx_queues) - 1);
+       cmd->count = cpu_to_le32(sizeof(struct iwl_mvm_internal_rxq_notif) +
+                                size);
+       notif->type = type;
+       notif->sync = sync;
+
        /* size must be a multiple of DWORD */
-       if (WARN_ON(cmd.cmd.count & cpu_to_le32(3)))
+       if (WARN_ON(cmd->count & cpu_to_le32(3)))
                return;
 
        if (!iwl_mvm_has_new_rx_api(mvm))
                return;
 
        if (sync) {
-               cmd.notif.cookie = mvm->queue_sync_cookie;
+               notif->cookie = mvm->queue_sync_cookie;
                mvm->queue_sync_state = (1 << mvm->trans->num_rx_queues) - 1;
        }
 
-- 
2.43.0