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rtlwifi: rtl8192cu: Fix problem that prevents reassociation 

The driver was failing to clear the BSSID when a disconnect happened. That
prevented a reconnection. This problem is reported at
https://bugzilla.redhat.com/show_bug.cgi?id=789605,
https://bugzilla.redhat.com/show_bug.cgi?id=866786,
https://bugzilla.redhat.com/show_bug.cgi?id=906734, and
https://bugzilla.kernel.org/show_bug.cgi?id=46171.

Thanks to Jussi Kivilinna for making the critical observation
that led to the solution.

Reported-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Tested-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Tested-by: Alessandro Lannocca <alessandro.lannocca@gmail.com>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Stable <stable@vger.kernel.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Larry Finger 2013-03-13 10:28:13 -05:00 committed by John W. Linville
parent 5818a46a99
commit 9437a248e7
1 changed files with 43 additions and 60 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

103
drivers/net/wireless/rtlwifi/rtl8192cu/hw.c
View File

@ -1377,74 +1377,57 @@ void rtl92cu_card_disable(struct ieee80211_hw *hw)
void rtl92cu_set_check_bssid(struct ieee80211_hw *hw, bool check_bssid)
{
/* dummy routine needed for callback from rtl_op_configure_filter() */
struct rtl_priv *rtlpriv = rtl_priv(hw);
struct rtl_hal *rtlhal = rtl_hal(rtlpriv);
u32 reg_rcr = rtl_read_dword(rtlpriv, REG_RCR);
if (rtlpriv->psc.rfpwr_state != ERFON)
return;
if (check_bssid) {
u8 tmp;
if (IS_NORMAL_CHIP(rtlhal->version)) {
reg_rcr |= (RCR_CBSSID_DATA | RCR_CBSSID_BCN);
tmp = BIT(4);
} else {
reg_rcr |= RCR_CBSSID;
tmp = BIT(4) | BIT(5);
}
rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_RCR,
(u8 *) (&reg_rcr));
_rtl92cu_set_bcn_ctrl_reg(hw, 0, tmp);
} else {
u8 tmp;
if (IS_NORMAL_CHIP(rtlhal->version)) {
reg_rcr &= ~(RCR_CBSSID_DATA | RCR_CBSSID_BCN);
tmp = BIT(4);
} else {
reg_rcr &= ~RCR_CBSSID;
tmp = BIT(4) | BIT(5);
}
reg_rcr &= (~(RCR_CBSSID_DATA | RCR_CBSSID_BCN));
rtlpriv->cfg->ops->set_hw_reg(hw,
HW_VAR_RCR, (u8 *) (&reg_rcr));
_rtl92cu_set_bcn_ctrl_reg(hw, tmp, 0);
}
}
/*========================================================================== */
static void _rtl92cu_set_check_bssid(struct ieee80211_hw *hw,
enum nl80211_iftype type)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
u32 reg_rcr = rtl_read_dword(rtlpriv, REG_RCR);
struct rtl_hal *rtlhal = rtl_hal(rtlpriv);
struct rtl_phy *rtlphy = &(rtlpriv->phy);
u8 filterout_non_associated_bssid = false;
switch (type) {
case NL80211_IFTYPE_ADHOC:
case NL80211_IFTYPE_STATION:
filterout_non_associated_bssid = true;
break;
case NL80211_IFTYPE_UNSPECIFIED:
case NL80211_IFTYPE_AP:
default:
break;
}
if (filterout_non_associated_bssid) {
if (IS_NORMAL_CHIP(rtlhal->version)) {
switch (rtlphy->current_io_type) {
case IO_CMD_RESUME_DM_BY_SCAN:
reg_rcr |= (RCR_CBSSID_DATA | RCR_CBSSID_BCN);
rtlpriv->cfg->ops->set_hw_reg(hw,
HW_VAR_RCR, (u8 *)(&reg_rcr));
/* enable update TSF */
_rtl92cu_set_bcn_ctrl_reg(hw, 0, BIT(4));
break;
case IO_CMD_PAUSE_DM_BY_SCAN:
reg_rcr &= ~(RCR_CBSSID_DATA | RCR_CBSSID_BCN);
rtlpriv->cfg->ops->set_hw_reg(hw,
HW_VAR_RCR, (u8 *)(&reg_rcr));
/* disable update TSF */
_rtl92cu_set_bcn_ctrl_reg(hw, BIT(4), 0);
break;
}
} else {
reg_rcr |= (RCR_CBSSID);
rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_RCR,
(u8 *)(&reg_rcr));
_rtl92cu_set_bcn_ctrl_reg(hw, 0, (BIT(4)|BIT(5)));
}
} else if (filterout_non_associated_bssid == false) {
if (IS_NORMAL_CHIP(rtlhal->version)) {
reg_rcr &= (~(RCR_CBSSID_DATA | RCR_CBSSID_BCN));
rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_RCR,
(u8 *)(&reg_rcr));
_rtl92cu_set_bcn_ctrl_reg(hw, BIT(4), 0);
} else {
reg_rcr &= (~RCR_CBSSID);
rtlpriv->cfg->ops->set_hw_reg(hw, HW_VAR_RCR,
(u8 *)(&reg_rcr));
_rtl92cu_set_bcn_ctrl_reg(hw, (BIT(4)|BIT(5)), 0);
}
}
}
int rtl92cu_set_network_type(struct ieee80211_hw *hw, enum nl80211_iftype type)
{
struct rtl_priv *rtlpriv = rtl_priv(hw);
if (_rtl92cu_set_media_status(hw, type))
return -EOPNOTSUPP;
_rtl92cu_set_check_bssid(hw, type);
if (rtlpriv->mac80211.link_state == MAC80211_LINKED) {
if (type != NL80211_IFTYPE_AP)
rtl92cu_set_check_bssid(hw, true);
} else {
rtl92cu_set_check_bssid(hw, false);
}
return 0;
}