by Larry Finger

[permalink] [raw]

Subject: [PATCH 6/7 NEXT] rtlwifi: rtl8188ee: rtl8192com: rtl8192cu: rtl8192ee: rtl8723ae: rtl87323be: rtl8821ae: Use common cmd_send_packet

A locking problem was found in routine _rtl92ee_cmd_send_packet() that led
to system freezes. Upon inspection, several drivers had the same problem;
however, the routines all used the same code. The common code has been
moved into rtlwifi.

Signed-off-by: Larry Finger <[email protected]>
---
drivers/net/wireless/rtlwifi/core.c | 31 ++++++++++++++++++
drivers/net/wireless/rtlwifi/core.h | 1 +
drivers/net/wireless/rtlwifi/rtl8188ee/fw.c | 36 ++-------------------
drivers/net/wireless/rtlwifi/rtl8192c/fw_common.c | 36 ++-------------------
drivers/net/wireless/rtlwifi/rtl8192cu/sw.c | 1 -
drivers/net/wireless/rtlwifi/rtl8192ee/fw.c | 34 ++------------------
drivers/net/wireless/rtlwifi/rtl8723ae/fw.c | 3 +-
drivers/net/wireless/rtlwifi/rtl8723be/fw.c | 3 +-
drivers/net/wireless/rtlwifi/rtl8821ae/fw.c | 38 ++---------------------
drivers/net/wireless/rtlwifi/wifi.h | 1 -
10 files changed, 45 insertions(+), 139 deletions(-)

diff --git a/drivers/net/wireless/rtlwifi/core.c b/drivers/net/wireless/rtlwifi/core.c
index d30f416..2a6e84b 100644
--- a/drivers/net/wireless/rtlwifi/core.c
+++ b/drivers/net/wireless/rtlwifi/core.c
@@ -1798,3 +1798,34 @@ bool rtl_hal_pwrseqcmdparsing(struct rtl_priv *rtlpriv, u8 cut_version,
return true;
}
EXPORT_SYMBOL(rtl_hal_pwrseqcmdparsing);
+
+bool rtl_cmd_send_packet(struct ieee80211_hw *hw, struct sk_buff *skb)
+{
+ struct rtl_priv *rtlpriv = rtl_priv(hw);
+ struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
+ struct rtl8192_tx_ring *ring;
+ struct rtl_tx_desc *pdesc;
+ unsigned long flags;
+ struct sk_buff *pskb = NULL;
+
+ ring = &rtlpci->tx_ring[BEACON_QUEUE];
+
+ spin_lock_irqsave(&rtlpriv->locks.irq_th_lock, flags);
+ pskb = __skb_dequeue(&ring->queue);
+ if (pskb)
+ kfree_skb(pskb);
+
+ /*this is wrong, fill_tx_cmddesc needs update*/
+ pdesc = &ring->desc[0];
+
+ rtlpriv->cfg->ops->fill_tx_cmddesc(hw, (u8 *)pdesc, 1, 1, skb);
+
+ __skb_queue_tail(&ring->queue, skb);
+
+ spin_unlock_irqrestore(&rtlpriv->locks.irq_th_lock, flags);
+
+ rtlpriv->cfg->ops->tx_polling(hw, BEACON_QUEUE);
+
+ return true;
+}
+EXPORT_SYMBOL(rtl_cmd_send_packet);
diff --git a/drivers/net/wireless/rtlwifi/core.h b/drivers/net/wireless/rtlwifi/core.h
index cdd4727..59cd3b9 100644
--- a/drivers/net/wireless/rtlwifi/core.h
+++ b/drivers/net/wireless/rtlwifi/core.h
@@ -41,5 +41,6 @@ void rtl_addr_delay(u32 addr);
void rtl_rfreg_delay(struct ieee80211_hw *hw, enum radio_path rfpath, u32 addr,
u32 mask, u32 data);
void rtl_bb_delay(struct ieee80211_hw *hw, u32 addr, u32 data);
+bool rtl_cmd_send_packet(struct ieee80211_hw *hw, struct sk_buff *skb);

#endif
diff --git a/drivers/net/wireless/rtlwifi/rtl8188ee/fw.c b/drivers/net/wireless/rtlwifi/rtl8188ee/fw.c
index 8d4cf2e..c8058aa 100644
--- a/drivers/net/wireless/rtlwifi/rtl8188ee/fw.c
+++ b/drivers/net/wireless/rtlwifi/rtl8188ee/fw.c
@@ -26,6 +26,7 @@
#include "../wifi.h"
#include "../pci.h"
#include "../base.h"
+#include "../core.h"
#include "reg.h"
#include "def.h"
#include "fw.h"
@@ -512,39 +513,6 @@ void rtl88e_set_fw_ap_off_load_cmd(struct ieee80211_hw *hw,

}

-static bool _rtl88e_cmd_send_packet(struct ieee80211_hw *hw,
- struct sk_buff *skb)
-{
- struct rtl_priv *rtlpriv = rtl_priv(hw);
- struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
- struct rtl8192_tx_ring *ring;
- struct rtl_tx_desc *pdesc;
- struct sk_buff *pskb = NULL;
- u8 own;
- unsigned long flags;
-
- ring = &rtlpci->tx_ring[BEACON_QUEUE];
-
- pskb = __skb_dequeue(&ring->queue);
- if (pskb)
- kfree_skb(pskb);
-
- spin_lock_irqsave(&rtlpriv->locks.irq_th_lock, flags);
-
- pdesc = &ring->desc[0];
- own = (u8)rtlpriv->cfg->ops->get_desc((u8 *)pdesc, true, HW_DESC_OWN);
-
- rtlpriv->cfg->ops->fill_tx_cmddesc(hw, (u8 *)pdesc, 1, 1, skb);
-
- __skb_queue_tail(&ring->queue, skb);
-
- spin_unlock_irqrestore(&rtlpriv->locks.irq_th_lock, flags);
-
- rtlpriv->cfg->ops->tx_polling(hw, BEACON_QUEUE);
-
- return true;
-}
-
#define BEACON_PG 0 /* ->1 */
#define PSPOLL_PG 2
#define NULL_PG 3
@@ -730,7 +698,7 @@ void rtl88e_set_fw_rsvdpagepkt(struct ieee80211_hw *hw, bool b_dl_finished)
memcpy(skb_put(skb, totalpacketlen),
&reserved_page_packet, totalpacketlen);

- rtstatus = _rtl88e_cmd_send_packet(hw, skb);
+ rtstatus = rtl_cmd_send_packet(hw, skb);

if (rtstatus)
b_dlok = true;
diff --git a/drivers/net/wireless/rtlwifi/rtl8192c/fw_common.c b/drivers/net/wireless/rtlwifi/rtl8192c/fw_common.c
index 6a57e6d..a00861b 100644
--- a/drivers/net/wireless/rtlwifi/rtl8192c/fw_common.c
+++ b/drivers/net/wireless/rtlwifi/rtl8192c/fw_common.c
@@ -26,6 +26,7 @@
#include "../wifi.h"
#include "../pci.h"
#include "../base.h"
+#include "../core.h"
#include "../rtl8192ce/reg.h"
#include "../rtl8192ce/def.h"
#include "fw_common.h"
@@ -538,39 +539,6 @@ void rtl92c_set_fw_pwrmode_cmd(struct ieee80211_hw *hw, u8 mode)
}
EXPORT_SYMBOL(rtl92c_set_fw_pwrmode_cmd);

-static bool _rtl92c_cmd_send_packet(struct ieee80211_hw *hw,
- struct sk_buff *skb)
-{
- struct rtl_priv *rtlpriv = rtl_priv(hw);
- struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
- struct rtl8192_tx_ring *ring;
- struct rtl_tx_desc *pdesc;
- u8 own;
- unsigned long flags;
- struct sk_buff *pskb = NULL;
-
- ring = &rtlpci->tx_ring[BEACON_QUEUE];
-
- pskb = __skb_dequeue(&ring->queue);
- if (pskb)
- kfree_skb(pskb);
-
- spin_lock_irqsave(&rtlpriv->locks.irq_th_lock, flags);
-
- pdesc = &ring->desc[0];
- own = (u8)rtlpriv->cfg->ops->get_desc((u8 *)pdesc, true, HW_DESC_OWN);
-
- rtlpriv->cfg->ops->fill_tx_cmddesc(hw, (u8 *)pdesc, 1, 1, skb);
-
- __skb_queue_tail(&ring->queue, skb);
-
- spin_unlock_irqrestore(&rtlpriv->locks.irq_th_lock, flags);
-
- rtlpriv->cfg->ops->tx_polling(hw, BEACON_QUEUE);
-
- return true;
-}
-
#define BEACON_PG 0 /*->1*/
#define PSPOLL_PG 2
#define NULL_PG 3
@@ -754,7 +722,7 @@ void rtl92c_set_fw_rsvdpagepkt(struct ieee80211_hw *hw, bool b_dl_finished)
memcpy((u8 *)skb_put(skb, totalpacketlen),
&reserved_page_packet, totalpacketlen);

- rtstatus = _rtl92c_cmd_send_packet(hw, skb);
+ rtstatus = rtl_cmd_send_packet(hw, skb);

if (rtstatus)
b_dlok = true;
diff --git a/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c b/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c
index f72f0db..7c5fbaf 100644
--- a/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c
+++ b/drivers/net/wireless/rtlwifi/rtl8192cu/sw.c
@@ -122,7 +122,6 @@ static struct rtl_hal_ops rtl8192cu_hal_ops = {
.fill_tx_desc = rtl92cu_tx_fill_desc,
.fill_fake_txdesc = rtl92cu_fill_fake_txdesc,
.fill_tx_cmddesc = rtl92cu_tx_fill_cmddesc,
- .cmd_send_packet = rtl92cu_cmd_send_packet,
.query_rx_desc = rtl92cu_rx_query_desc,
.set_channel_access = rtl92cu_update_channel_access_setting,
.radio_onoff_checking = rtl92cu_gpio_radio_on_off_checking,
diff --git a/drivers/net/wireless/rtlwifi/rtl8192ee/fw.c b/drivers/net/wireless/rtlwifi/rtl8192ee/fw.c
index 3c4a9a9..45c128b 100644
--- a/drivers/net/wireless/rtlwifi/rtl8192ee/fw.c
+++ b/drivers/net/wireless/rtlwifi/rtl8192ee/fw.c
@@ -26,6 +26,7 @@
#include "../wifi.h"
#include "../pci.h"
#include "../base.h"
+#include "../core.h"
#include "reg.h"
#include "def.h"
#include "fw.h"
@@ -541,37 +542,6 @@ void rtl92ee_set_fw_media_status_rpt_cmd(struct ieee80211_hw *hw, u8 mstatus)
rtl92ee_fill_h2c_cmd(hw, H2C_92E_MSRRPT, 3, parm);
}

-static bool _rtl92ee_cmd_send_packet(struct ieee80211_hw *hw,
- struct sk_buff *skb)
-{
- struct rtl_priv *rtlpriv = rtl_priv(hw);
- struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
- struct rtl8192_tx_ring *ring;
- struct rtl_tx_desc *pdesc;
- unsigned long flags;
- struct sk_buff *pskb = NULL;
-
- ring = &rtlpci->tx_ring[BEACON_QUEUE];
-
- pskb = __skb_dequeue(&ring->queue);
- if (pskb)
- kfree_skb(pskb);
-
- spin_lock_irqsave(&rtlpriv->locks.irq_th_lock, flags);
- /*this is wrong, fill_tx_cmddesc needs update*/
- pdesc = &ring->desc[0];
-
- rtlpriv->cfg->ops->fill_tx_cmddesc(hw, (u8 *)pdesc, 1, 1, skb);
-
- __skb_queue_tail(&ring->queue, skb);
-
- spin_unlock_irqrestore(&rtlpriv->locks.irq_th_lock, flags);
-
- rtlpriv->cfg->ops->tx_polling(hw, BEACON_QUEUE);
-
- return true;
-}
-
#define BEACON_PG 0 /* ->1 */
#define PSPOLL_PG 2
#define NULL_PG 3
@@ -758,7 +728,7 @@ void rtl92ee_set_fw_rsvdpagepkt(struct ieee80211_hw *hw, bool b_dl_finished)
memcpy((u8 *)skb_put(skb, totalpacketlen),
&reserved_page_packet, totalpacketlen);

- rtstatus = _rtl92ee_cmd_send_packet(hw, skb);
+ rtstatus = rtl_cmd_send_packet(hw, skb);

if (rtstatus)
b_dlok = true;
diff --git a/drivers/net/wireless/rtlwifi/rtl8723ae/fw.c b/drivers/net/wireless/rtlwifi/rtl8723ae/fw.c
index 97d92e2..b7c0d38 100644
--- a/drivers/net/wireless/rtlwifi/rtl8723ae/fw.c
+++ b/drivers/net/wireless/rtlwifi/rtl8723ae/fw.c
@@ -26,6 +26,7 @@
#include "../wifi.h"
#include "../pci.h"
#include "../base.h"
+#include "../core.h"
#include "reg.h"
#include "def.h"
#include "fw.h"
@@ -473,7 +474,7 @@ void rtl8723e_set_fw_rsvdpagepkt(struct ieee80211_hw *hw, bool b_dl_finished)
memcpy((u8 *)skb_put(skb, totalpacketlen),
&reserved_page_packet, totalpacketlen);

- rtstatus = rtl8723_cmd_send_packet(hw, skb);
+ rtstatus = rtl_cmd_send_packet(hw, skb);

if (rtstatus)
b_dlok = true;
diff --git a/drivers/net/wireless/rtlwifi/rtl8723be/fw.c b/drivers/net/wireless/rtlwifi/rtl8723be/fw.c
index 0c07992..69d4f0f 100644
--- a/drivers/net/wireless/rtlwifi/rtl8723be/fw.c
+++ b/drivers/net/wireless/rtlwifi/rtl8723be/fw.c
@@ -26,6 +26,7 @@
#include "../wifi.h"
#include "../pci.h"
#include "../base.h"
+#include "../core.h"
#include "reg.h"
#include "def.h"
#include "fw.h"
@@ -467,7 +468,7 @@ void rtl8723be_set_fw_rsvdpagepkt(struct ieee80211_hw *hw,
memcpy((u8 *)skb_put(skb, totalpacketlen),
&reserved_page_packet, totalpacketlen);

- rtstatus = rtl8723_cmd_send_packet(hw, skb);
+ rtstatus = rtl_cmd_send_packet(hw, skb);

if (rtstatus)
b_dlok = true;
diff --git a/drivers/net/wireless/rtlwifi/rtl8821ae/fw.c b/drivers/net/wireless/rtlwifi/rtl8821ae/fw.c
index 2efdb64..95e9562 100644
--- a/drivers/net/wireless/rtlwifi/rtl8821ae/fw.c
+++ b/drivers/net/wireless/rtlwifi/rtl8821ae/fw.c
@@ -26,6 +26,7 @@
#include "../wifi.h"
#include "../pci.h"
#include "../base.h"
+#include "../core.h"
#include "reg.h"
#include "def.h"
#include "fw.h"
@@ -742,39 +743,6 @@ void rtl8821ae_set_fw_global_info_cmd(struct ieee80211_hw *hw)
remote_wakeup_sec_info, H2C_8821AE_AOAC_GLOBAL_INFO_LEN);
}

-static bool _rtl8821ae_cmd_send_packet(struct ieee80211_hw *hw,
- struct sk_buff *skb)
-{
- struct rtl_priv *rtlpriv = rtl_priv(hw);
- struct rtl_pci *rtlpci = rtl_pcidev(rtl_pcipriv(hw));
- struct rtl8192_tx_ring *ring;
- struct rtl_tx_desc *pdesc;
- struct sk_buff *pskb = NULL;
- u8 own;
- unsigned long flags;
-
- ring = &rtlpci->tx_ring[BEACON_QUEUE];
-
- pskb = __skb_dequeue(&ring->queue);
- if (pskb)
- kfree_skb(pskb);
-
- spin_lock_irqsave(&rtlpriv->locks.irq_th_lock, flags);
-
- pdesc = &ring->desc[0];
- own = (u8)rtlpriv->cfg->ops->get_desc((u8 *)pdesc, true, HW_DESC_OWN);
-
- rtlpriv->cfg->ops->fill_tx_cmddesc(hw, (u8 *)pdesc, 1, 1, skb);
-
- __skb_queue_tail(&ring->queue, skb);
-
- spin_unlock_irqrestore(&rtlpriv->locks.irq_th_lock, flags);
-
- rtlpriv->cfg->ops->tx_polling(hw, BEACON_QUEUE);
-
- return true;
-}
-
#define BEACON_PG 0
#define PSPOLL_PG 1
#define NULL_PG 2
@@ -1581,7 +1549,7 @@ out:
memcpy((u8 *)skb_put(skb, totalpacketlen),
&reserved_page_packet_8812, totalpacketlen);

- rtstatus = _rtl8821ae_cmd_send_packet(hw, skb);
+ rtstatus = rtl_cmd_send_packet(hw, skb);

if (rtstatus)
b_dlok = true;
@@ -1706,7 +1674,7 @@ out:
memcpy((u8 *)skb_put(skb, totalpacketlen),
&reserved_page_packet_8821, totalpacketlen);

- rtstatus = _rtl8821ae_cmd_send_packet(hw, skb);
+ rtstatus = rtl_cmd_send_packet(hw, skb);

if (rtstatus)
b_dlok = true;
diff --git a/drivers/net/wireless/rtlwifi/wifi.h b/drivers/net/wireless/rtlwifi/wifi.h
index 050a242..c2b4786 100644
--- a/drivers/net/wireless/rtlwifi/wifi.h
+++ b/drivers/net/wireless/rtlwifi/wifi.h
@@ -2101,7 +2101,6 @@ struct rtl_hal_ops {
void (*fill_tx_cmddesc) (struct ieee80211_hw *hw, u8 *pdesc,
bool firstseg, bool lastseg,
struct sk_buff *skb);
- bool (*cmd_send_packet)(struct ieee80211_hw *hw, struct sk_buff *skb);
bool (*query_rx_desc) (struct ieee80211_hw *hw,
struct rtl_stats *stats,
struct ieee80211_rx_status *rx_status,
--
1.8.4.5