From 3b1088a09ec9438523c251d8435e78988824bc0d Mon Sep 17 00:00:00 2001 From: "Gustavo A. R. Silva" Date: Tue, 7 Mar 2023 16:22:39 -0600 Subject: [PATCH] wifi: ath11k: Replace fake flex-array with flexible-array member MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Zero-length arrays as fake flexible arrays are deprecated and we are moving towards adopting C99 flexible-array members instead. Address 25 of the following warnings found with GCC-13 and -fstrict-flex-arrays=3 enabled: drivers/net/wireless/ath/ath11k/debugfs_htt_stats.c:30:51: warning: array subscript is outside array bounds of ‘const u32[0]’ {aka ‘const unsigned int[]’} [-Warray-bounds=] This helps with the ongoing efforts to tighten the FORTIFY_SOURCE routines on memcpy() and help us make progress towards globally enabling -fstrict-flex-arrays=3 [1]. Link: https://github.com/KSPP/linux/issues/21 Link: https://github.com/KSPP/linux/issues/266 Link: https://gcc.gnu.org/pipermail/gcc-patches/2022-October/602902.html [1] Signed-off-by: Gustavo A. R. Silva Reviewed-by: Simon Horman Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/ZAe5L5DtmsQxzqRH@work --- .../wireless/ath/ath11k/debugfs_htt_stats.h | 73 +++++++++++-------- 1 file changed, 43 insertions(+), 30 deletions(-) --- a/drivers/net/wireless/ath/ath11k/debugfs_htt_stats.h +++ b/drivers/net/wireless/ath/ath11k/debugfs_htt_stats.h @@ -143,7 +143,8 @@ enum htt_tx_pdev_underrun_enum { /* Bytes stored in little endian order */ /* Length should be multiple of DWORD */ struct htt_stats_string_tlv { - u32 data[0]; /* Can be variable length */ + /* Can be variable length */ + DECLARE_FLEX_ARRAY(u32, data); } __packed; #define HTT_STATS_MAC_ID GENMASK(7, 0) @@ -205,27 +206,32 @@ struct htt_tx_pdev_stats_cmn_tlv { /* NOTE: Variable length TLV, use length spec to infer array size */ struct htt_tx_pdev_stats_urrn_tlv_v { - u32 urrn_stats[0]; /* HTT_TX_PDEV_MAX_URRN_STATS */ + /* HTT_TX_PDEV_MAX_URRN_STATS */ + DECLARE_FLEX_ARRAY(u32, urrn_stats); }; /* NOTE: Variable length TLV, use length spec to infer array size */ struct htt_tx_pdev_stats_flush_tlv_v { - u32 flush_errs[0]; /* HTT_TX_PDEV_MAX_FLUSH_REASON_STATS */ + /* HTT_TX_PDEV_MAX_FLUSH_REASON_STATS */ + DECLARE_FLEX_ARRAY(u32, flush_errs); }; /* NOTE: Variable length TLV, use length spec to infer array size */ struct htt_tx_pdev_stats_sifs_tlv_v { - u32 sifs_status[0]; /* HTT_TX_PDEV_MAX_SIFS_BURST_STATS */ + /* HTT_TX_PDEV_MAX_SIFS_BURST_STATS */ + DECLARE_FLEX_ARRAY(u32, sifs_status); }; /* NOTE: Variable length TLV, use length spec to infer array size */ struct htt_tx_pdev_stats_phy_err_tlv_v { - u32 phy_errs[0]; /* HTT_TX_PDEV_MAX_PHY_ERR_STATS */ + /* HTT_TX_PDEV_MAX_PHY_ERR_STATS */ + DECLARE_FLEX_ARRAY(u32, phy_errs); }; /* NOTE: Variable length TLV, use length spec to infer array size */ struct htt_tx_pdev_stats_sifs_hist_tlv_v { - u32 sifs_hist_status[0]; /* HTT_TX_PDEV_SIFS_BURST_HIST_STATS */ + /* HTT_TX_PDEV_SIFS_BURST_HIST_STATS */ + DECLARE_FLEX_ARRAY(u32, sifs_hist_status); }; struct htt_tx_pdev_stats_tx_ppdu_stats_tlv_v { @@ -590,20 +596,20 @@ struct htt_tx_hwq_difs_latency_stats_tlv /* NOTE: Variable length TLV, use length spec to infer array size */ struct htt_tx_hwq_cmd_result_stats_tlv_v { - /* Histogram of sched cmd result */ - u32 cmd_result[0]; /* HTT_TX_HWQ_MAX_CMD_RESULT_STATS */ + /* Histogram of sched cmd result, HTT_TX_HWQ_MAX_CMD_RESULT_STATS */ + DECLARE_FLEX_ARRAY(u32, cmd_result); }; /* NOTE: Variable length TLV, use length spec to infer array size */ struct htt_tx_hwq_cmd_stall_stats_tlv_v { - /* Histogram of various pause conitions */ - u32 cmd_stall_status[0]; /* HTT_TX_HWQ_MAX_CMD_STALL_STATS */ + /* Histogram of various pause conitions, HTT_TX_HWQ_MAX_CMD_STALL_STATS */ + DECLARE_FLEX_ARRAY(u32, cmd_stall_status); }; /* NOTE: Variable length TLV, use length spec to infer array size */ struct htt_tx_hwq_fes_result_stats_tlv_v { - /* Histogram of number of user fes result */ - u32 fes_result[0]; /* HTT_TX_HWQ_MAX_FES_RESULT_STATS */ + /* Histogram of number of user fes result, HTT_TX_HWQ_MAX_FES_RESULT_STATS */ + DECLARE_FLEX_ARRAY(u32, fes_result); }; /* NOTE: Variable length TLV, use length spec to infer array size @@ -635,8 +641,8 @@ struct htt_tx_hwq_tried_mpdu_cnt_hist_tl * #define WAL_TXOP_USED_HISTOGRAM_INTERVAL 1000 ( 1 ms ) */ struct htt_tx_hwq_txop_used_cnt_hist_tlv_v { - /* Histogram of txop used cnt */ - u32 txop_used_cnt_hist[0]; /* HTT_TX_HWQ_TXOP_USED_CNT_HIST */ + /* Histogram of txop used cnt, HTT_TX_HWQ_TXOP_USED_CNT_HIST */ + DECLARE_FLEX_ARRAY(u32, txop_used_cnt_hist); }; /* == TX SELFGEN STATS == */ @@ -804,17 +810,20 @@ struct htt_tx_pdev_mpdu_stats_tlv { /* == TX SCHED STATS == */ /* NOTE: Variable length TLV, use length spec to infer array size */ struct htt_sched_txq_cmd_posted_tlv_v { - u32 sched_cmd_posted[0]; /* HTT_TX_PDEV_SCHED_TX_MODE_MAX */ + /* HTT_TX_PDEV_SCHED_TX_MODE_MAX */ + DECLARE_FLEX_ARRAY(u32, sched_cmd_posted); }; /* NOTE: Variable length TLV, use length spec to infer array size */ struct htt_sched_txq_cmd_reaped_tlv_v { - u32 sched_cmd_reaped[0]; /* HTT_TX_PDEV_SCHED_TX_MODE_MAX */ + /* HTT_TX_PDEV_SCHED_TX_MODE_MAX */ + DECLARE_FLEX_ARRAY(u32, sched_cmd_reaped); }; /* NOTE: Variable length TLV, use length spec to infer array size */ struct htt_sched_txq_sched_order_su_tlv_v { - u32 sched_order_su[0]; /* HTT_TX_PDEV_NUM_SCHED_ORDER_LOG */ + /* HTT_TX_PDEV_NUM_SCHED_ORDER_LOG */ + DECLARE_FLEX_ARRAY(u32, sched_order_su); }; enum htt_sched_txq_sched_ineligibility_tlv_enum { @@ -842,7 +851,7 @@ enum htt_sched_txq_sched_ineligibility_t /* NOTE: Variable length TLV, use length spec to infer array size */ struct htt_sched_txq_sched_ineligibility_tlv_v { /* indexed by htt_sched_txq_sched_ineligibility_tlv_enum */ - u32 sched_ineligibility[0]; + DECLARE_FLEX_ARRAY(u32, sched_ineligibility); }; #define HTT_TX_PDEV_STATS_SCHED_PER_TXQ_MAC_ID GENMASK(7, 0) @@ -888,18 +897,20 @@ struct htt_stats_tx_sched_cmn_tlv { /* NOTE: Variable length TLV, use length spec to infer array size */ struct htt_tx_tqm_gen_mpdu_stats_tlv_v { - u32 gen_mpdu_end_reason[0]; /* HTT_TX_TQM_MAX_GEN_MPDU_END_REASON */ + /* HTT_TX_TQM_MAX_GEN_MPDU_END_REASON */ + DECLARE_FLEX_ARRAY(u32, gen_mpdu_end_reason); }; /* NOTE: Variable length TLV, use length spec to infer array size */ struct htt_tx_tqm_list_mpdu_stats_tlv_v { - u32 list_mpdu_end_reason[0]; /* HTT_TX_TQM_MAX_LIST_MPDU_END_REASON */ + /* HTT_TX_TQM_MAX_LIST_MPDU_END_REASON */ + DECLARE_FLEX_ARRAY(u32, list_mpdu_end_reason); }; /* NOTE: Variable length TLV, use length spec to infer array size */ struct htt_tx_tqm_list_mpdu_cnt_tlv_v { - u32 list_mpdu_cnt_hist[0]; - /* HTT_TX_TQM_MAX_LIST_MPDU_CNT_HISTOGRAM_BINS */ + /* HTT_TX_TQM_MAX_LIST_MPDU_CNT_HISTOGRAM_BINS */ + DECLARE_FLEX_ARRAY(u32, list_mpdu_cnt_hist); }; struct htt_tx_tqm_pdev_stats_tlv_v { @@ -1098,7 +1109,7 @@ struct htt_tx_de_compl_stats_tlv { * ENTRIES_PER_BIN_COUNT) */ struct htt_tx_de_fw2wbm_ring_full_hist_tlv { - u32 fw2wbm_ring_full_hist[0]; + DECLARE_FLEX_ARRAY(u32, fw2wbm_ring_full_hist); }; struct htt_tx_de_cmn_stats_tlv { @@ -1151,7 +1162,7 @@ struct htt_ring_if_cmn_tlv { /* NOTE: Variable length TLV, use length spec to infer array size */ struct htt_sfm_client_user_tlv_v { /* Number of DWORDS used per user and per client */ - u32 dwords_used_by_user_n[0]; + DECLARE_FLEX_ARRAY(u32, dwords_used_by_user_n); }; struct htt_sfm_client_tlv { @@ -1436,12 +1447,14 @@ struct htt_rx_soc_fw_stats_tlv { /* NOTE: Variable length TLV, use length spec to infer array size */ struct htt_rx_soc_fw_refill_ring_empty_tlv_v { - u32 refill_ring_empty_cnt[0]; /* HTT_RX_STATS_REFILL_MAX_RING */ + /* HTT_RX_STATS_REFILL_MAX_RING */ + DECLARE_FLEX_ARRAY(u32, refill_ring_empty_cnt); }; /* NOTE: Variable length TLV, use length spec to infer array size */ struct htt_rx_soc_fw_refill_ring_num_refill_tlv_v { - u32 refill_ring_num_refill[0]; /* HTT_RX_STATS_REFILL_MAX_RING */ + /* HTT_RX_STATS_REFILL_MAX_RING */ + DECLARE_FLEX_ARRAY(u32, refill_ring_num_refill); }; /* RXDMA error code from WBM released packets */ @@ -1473,7 +1486,7 @@ enum htt_rx_rxdma_error_code_enum { /* NOTE: Variable length TLV, use length spec to infer array size */ struct htt_rx_soc_fw_refill_ring_num_rxdma_err_tlv_v { - u32 rxdma_err[0]; /* HTT_RX_RXDMA_MAX_ERR_CODE */ + DECLARE_FLEX_ARRAY(u32, rxdma_err); /* HTT_RX_RXDMA_MAX_ERR_CODE */ }; /* REO error code from WBM released packets */ @@ -1505,7 +1518,7 @@ enum htt_rx_reo_error_code_enum { /* NOTE: Variable length TLV, use length spec to infer array size */ struct htt_rx_soc_fw_refill_ring_num_reo_err_tlv_v { - u32 reo_err[0]; /* HTT_RX_REO_MAX_ERR_CODE */ + DECLARE_FLEX_ARRAY(u32, reo_err); /* HTT_RX_REO_MAX_ERR_CODE */ }; /* == RX PDEV STATS == */ @@ -1622,13 +1635,13 @@ struct htt_rx_pdev_fw_stats_phy_err_tlv /* NOTE: Variable length TLV, use length spec to infer array size */ struct htt_rx_pdev_fw_ring_mpdu_err_tlv_v { /* Num error MPDU for each RxDMA error type */ - u32 fw_ring_mpdu_err[0]; /* HTT_RX_STATS_RXDMA_MAX_ERR */ + DECLARE_FLEX_ARRAY(u32, fw_ring_mpdu_err); /* HTT_RX_STATS_RXDMA_MAX_ERR */ }; /* NOTE: Variable length TLV, use length spec to infer array size */ struct htt_rx_pdev_fw_mpdu_drop_tlv_v { /* Num MPDU dropped */ - u32 fw_mpdu_drop[0]; /* HTT_RX_STATS_FW_DROP_REASON_MAX */ + DECLARE_FLEX_ARRAY(u32, fw_mpdu_drop); /* HTT_RX_STATS_FW_DROP_REASON_MAX */ }; #define HTT_PDEV_CCA_STATS_TX_FRAME_INFO_PRESENT (0x1)