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| author | Gustavo A. R. Silva <gustavo@embeddedor.com> | 2018-03-30 20:34:01 +0200 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2018-04-10 16:32:44 +0200 |
| commit | 9c27489a34548913baaaf3b2776e05d4a9389e3e (patch) | |
| tree | 916259532305a72cbef63d5df4e4a3e6daae72e6 /drivers/net/wireless/ath/ath9k/dfs.c | |
| parent | ath10k: fix spelling mistake: "tiggers" -> "triggers" (diff) | |
| download | linux-9c27489a34548913baaaf3b2776e05d4a9389e3e.tar.xz linux-9c27489a34548913baaaf3b2776e05d4a9389e3e.zip | |
ath9k: dfs: remove accidental use of stack VLA
In preparation to enabling -Wvla, remove accidental use of stack VLA.
This avoids an accidental stack VLA (since the compiler thinks
the value of FFT_NUM_SAMPLES can change, even when marked
"const"). This just replaces it with a #define.
Also, fixed as part of the directive to remove all VLAs from
the kernel: https://lkml.org/lkml/2018/3/7/621
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/dfs.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/dfs.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/net/wireless/ath/ath9k/dfs.c b/drivers/net/wireless/ath/ath9k/dfs.c index 6fee9a464cce..c8844f55574c 100644 --- a/drivers/net/wireless/ath/ath9k/dfs.c +++ b/drivers/net/wireless/ath/ath9k/dfs.c @@ -41,7 +41,7 @@ static const int BIN_DELTA_MAX = 10; /* we need at least 3 deltas / 4 samples for a reliable chirp detection */ #define NUM_DIFFS 3 -static const int FFT_NUM_SAMPLES = (NUM_DIFFS + 1); +#define FFT_NUM_SAMPLES (NUM_DIFFS + 1) /* Threshold for difference of delta peaks */ static const int MAX_DIFF = 2; @@ -114,7 +114,7 @@ static bool ath9k_check_chirping(struct ath_softc *sc, u8 *data, ath_dbg(common, DFS, "HT40: datalen=%d, num_fft_packets=%d\n", datalen, num_fft_packets); - if (num_fft_packets < (FFT_NUM_SAMPLES)) { + if (num_fft_packets < FFT_NUM_SAMPLES) { ath_dbg(common, DFS, "not enough packets for chirp\n"); return false; } @@ -136,7 +136,7 @@ static bool ath9k_check_chirping(struct ath_softc *sc, u8 *data, return false; ath_dbg(common, DFS, "HT20: datalen=%d, num_fft_packets=%d\n", datalen, num_fft_packets); - if (num_fft_packets < (FFT_NUM_SAMPLES)) { + if (num_fft_packets < FFT_NUM_SAMPLES) { ath_dbg(common, DFS, "not enough packets for chirp\n"); return false; } |