ath9k: trivial: change spectral relayfs buffering

The spectral data provided via relay-fs introduces a buffering
latency given by the subbuf_size. To meet the requirements for
delay-sensitive applications (like real-time spectral plotter),
reduce subbuf_size and increase n_subbufs.

Signed-off-by: Zefir Kurtisi <zefir.kurtisi@neratec.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath9k/debug.c b/drivers/net/wireless/ath/ath9k/debug.c
index 67a2a4b3b8836000ab20700d53d50939c3148ee7..e6307b86363a3aee4d78ca7303f137c1da788dae 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/debug.c
+++ b/drivers/net/wireless/ath/ath9k/debug.c
@@ -2072,7 +2072,7 @@ int ath9k_init_debug(struct ath_hw *ah)
                            &fops_modal_eeprom);
        sc->rfs_chan_spec_scan = relay_open("spectral_scan",
                                            sc->debug.debugfs_phy,
-                                           262144, 4, &rfs_spec_scan_cb,
+                                           1024, 256, &rfs_spec_scan_cb,
                                            NULL);
        debugfs_create_file("spectral_scan_ctl", S_IRUSR | S_IWUSR,
                            sc->debug.debugfs_phy, sc,