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ath9k: Add a HW capability for WLAN/BT RX diversity

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Make use of this capability to restrict the usage of the
debugfs file and modparam using which this feature can
be enabled.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Sujith Manoharan
2013-08-04 14:21:56 +05:30
committed by John W. Linville
parent 6308130542
commit 3f2da95517
4 changed files with 28 additions and 9 deletions
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6
drivers/net/wireless/ath/ath9k/debug.c
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@@ -289,6 +289,7 @@ static ssize_t write_file_bt_ant_diversity(struct file *file,
{
struct ath_softc *sc = file->private_data;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ath9k_hw_capabilities *pCap = &sc->sc_ah->caps;
unsigned long bt_ant_diversity;
char buf[32];
ssize_t len;
@@ -297,6 +298,9 @@ static ssize_t write_file_bt_ant_diversity(struct file *file,
if (copy_from_user(buf, user_buf, len))
return -EFAULT;
if (!(pCap->hw_caps & ATH9K_HW_CAP_BT_ANT_DIV))
goto exit;
buf[len] = '\0';
if (kstrtoul(buf, 0, &bt_ant_diversity))
return -EINVAL;
@@ -307,7 +311,7 @@ static ssize_t write_file_bt_ant_diversity(struct file *file,
ath_dbg(common, CONFIG, "Enable WLAN/BT RX Antenna diversity: %d\n",
common->bt_ant_diversity);
ath9k_ps_restore(sc);
exit:
return count;
}