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qcacld-3.0: Fix power units in wlan_hdd_cfg80211_set_txpower()

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wlan_hdd_cfg80211_set_txpower() currently expects the input power to
be in units of dBm. However cfg80211 specifies the set_tx_power()
method will pass the power in mBm, and that to get dBm the driver
should use MBM_TO_DBM(). The userspace tool "iw" also expects the
power to be in mBm.

In order to comply with the definition of cfg80211, change the
implementation of wlan_hdd_cfg80211_set_txpower() to expect the power
in mBm and use MBM_TO_DBM() to convert the power to dBm. But for
backward compatibility with userspace entities which are expecting the
current implementation, if the converted power is 0 then assume the
input power is already in dBm and use it without conversion.

Change-Id: I7c64f7ac14249a307357c91f8bea4dad8d59ff28
CRs-Fixed: 2331003
This commit is contained in:
Jeff Johnson
2018-10-10 11:18:43 -07:00
committed by nshrivas
parent 9872912754
commit 9de31c0bdb
1 changed files with 15 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
core/hdd/src/wlan_hdd_power.c
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@@ -1954,14 +1954,14 @@ int wlan_hdd_cfg80211_set_power_mgmt(struct wiphy *wiphy,
* @wiphy: Pointer to wiphy
* @wdev: Pointer to network device
* @type: TX power setting type
* @dbm: TX power in dbm
* @mbm: TX power in mBm
*
* Return: 0 for success, non-zero for failure
*/
static int __wlan_hdd_cfg80211_set_txpower(struct wiphy *wiphy,
struct wireless_dev *wdev,
enum nl80211_tx_power_setting type,
int dbm)
int mbm)
{
struct hdd_context *hdd_ctx = (struct hdd_context *) wiphy_priv(wiphy);
mac_handle_t mac_handle;
@@ -1969,6 +1969,7 @@ static int __wlan_hdd_cfg80211_set_txpower(struct wiphy *wiphy,
struct qdf_mac_addr selfMac = QDF_MAC_ADDR_BCAST_INIT;
QDF_STATUS status;
int errno;
int dbm;
hdd_enter();
@@ -1987,6 +1988,16 @@ static int __wlan_hdd_cfg80211_set_txpower(struct wiphy *wiphy,
mac_handle = hdd_ctx->mac_handle;
dbm = MBM_TO_DBM(mbm);
/*
* the original implementation of this function expected power
* values in dBm instead of mBm. If the conversion from mBm to
* dBm is zero, then assume dBm was passed.
*/
if (!dbm)
dbm = mbm;
status = sme_cfg_set_int(mac_handle, WNI_CFG_CURRENT_TX_POWER_LEVEL,
dbm);
if (QDF_IS_STATUS_ERROR(status)) {
@@ -2026,14 +2037,14 @@ static int __wlan_hdd_cfg80211_set_txpower(struct wiphy *wiphy,
int wlan_hdd_cfg80211_set_txpower(struct wiphy *wiphy,
struct wireless_dev *wdev,
enum nl80211_tx_power_setting type,
int dbm)
int mbm)
{
int ret;
cds_ssr_protect(__func__);
ret = __wlan_hdd_cfg80211_set_txpower(wiphy,
wdev,
type, dbm);
type, mbm);
cds_ssr_unprotect(__func__);
return ret;