rtlwifi: rtl8192ce: rtl8192cu: rtl8192de: Fix low-gain setting when scanning

commit 643c61e119459e9d750087b7b34be94491efebf9 upstream.

In https://bugzilla.redhat.com/show_bug.cgi?id=770207, slowdowns of driver
rtl8192ce are reported. One fix (commit a9b89e2) has already been applied,
and it helped, but the maximum RX speed would still drop to 1 Mbps. As in
the previous fix, the initial gain was determined to be the problem; however,
the problem arises from a setting of the gain when scans are started.

Driver rtl8192de also has the same code structure - this one is fixed as well.

Reported-and-Tested-by: Ivan Pesin <ivan.pesin@gmail.com>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/wireless/rtlwifi/rtl8192c/phy_common.c b/drivers/net/wireless/rtlwifi/rtl8192c/phy_common.c
index 1f07558..f20678a 100644 (file)
--- a/drivers/net/wireless/rtlwifi/rtl8192c/phy_common.c
+++ b/drivers/net/wireless/rtlwifi/rtl8192c/phy_common.c
@@ -1968,7 +1968,7 @@ void rtl92c_phy_set_io(struct ieee80211_hw *hw)
                break;
        case IO_CMD_PAUSE_DM_BY_SCAN:
                rtlphy->initgain_backup.xaagccore1 = dm_digtable.cur_igvalue;
-               dm_digtable.cur_igvalue = 0x17;
+               dm_digtable.cur_igvalue = 0x37;
                rtl92c_dm_write_dig(hw);
                break;
        default:

diff --git a/drivers/net/wireless/rtlwifi/rtl8192de/phy.c b/drivers/net/wireless/rtlwifi/rtl8192de/phy.c
index 0883349..2cf4c5f 100644 (file)
--- a/drivers/net/wireless/rtlwifi/rtl8192de/phy.c
+++ b/drivers/net/wireless/rtlwifi/rtl8192de/phy.c
@@ -3192,7 +3192,7 @@ static void rtl92d_phy_set_io(struct ieee80211_hw *hw)
                break;
        case IO_CMD_PAUSE_DM_BY_SCAN:
                rtlphy->initgain_backup.xaagccore1 = de_digtable.cur_igvalue;
-               de_digtable.cur_igvalue = 0x17;
+               de_digtable.cur_igvalue = 0x37;
                rtl92d_dm_write_dig(hw);
                break;
        default: