| Message ID | 99cf8894fd52202cb7ce2ec6e3200eef400bc071.1617609346.git.christophe.jaillet@wanadoo.fr (mailing list archive) |
|---|---|
| State | Awaiting Upstream |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | rtlwifi: Simplify locking of a skb list accesses | expand |
| Context | Check | Description |
|---|---|---|
| netdev/tree_selection | success | Not a local patch |
On 4/5/21 2:57 AM, Christophe JAILLET wrote: > The 'c2hcmd_lock' spinlock is only used to protect some __skb_queue_tail() > and __skb_dequeue() calls. > Use the lock provided in the skb itself and call skb_queue_tail() and > skb_dequeue(). These functions already include the correct locking. > > Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> > --- > drivers/net/wireless/realtek/rtlwifi/base.c | 15 ++------------- > drivers/net/wireless/realtek/rtlwifi/wifi.h | 1 - > 2 files changed, 2 insertions(+), 14 deletions(-) > > diff --git a/drivers/net/wireless/realtek/rtlwifi/base.c b/drivers/net/wireless/realtek/rtlwifi/base.c > index 6e8bd99e8911..2a7ee90a3f54 100644 > --- a/drivers/net/wireless/realtek/rtlwifi/base.c > +++ b/drivers/net/wireless/realtek/rtlwifi/base.c > @@ -551,7 +551,6 @@ int rtl_init_core(struct ieee80211_hw *hw) > spin_lock_init(&rtlpriv->locks.rf_lock); > spin_lock_init(&rtlpriv->locks.waitq_lock); > spin_lock_init(&rtlpriv->locks.entry_list_lock); > - spin_lock_init(&rtlpriv->locks.c2hcmd_lock); > spin_lock_init(&rtlpriv->locks.scan_list_lock); > spin_lock_init(&rtlpriv->locks.cck_and_rw_pagea_lock); > spin_lock_init(&rtlpriv->locks.fw_ps_lock); > @@ -2269,7 +2268,6 @@ static bool rtl_c2h_fast_cmd(struct ieee80211_hw *hw, struct sk_buff *skb) > void rtl_c2hcmd_enqueue(struct ieee80211_hw *hw, struct sk_buff *skb) > { > struct rtl_priv *rtlpriv = rtl_priv(hw); > - unsigned long flags; > > if (rtl_c2h_fast_cmd(hw, skb)) { > rtl_c2h_content_parsing(hw, skb); > @@ -2278,11 +2276,7 @@ void rtl_c2hcmd_enqueue(struct ieee80211_hw *hw, struct sk_buff *skb) > } > > /* enqueue */ > - spin_lock_irqsave(&rtlpriv->locks.c2hcmd_lock, flags); > - > - __skb_queue_tail(&rtlpriv->c2hcmd_queue, skb); > - > - spin_unlock_irqrestore(&rtlpriv->locks.c2hcmd_lock, flags); > + skb_queue_tail(&rtlpriv->c2hcmd_queue, skb); > > /* wake up wq */ > queue_delayed_work(rtlpriv->works.rtl_wq, &rtlpriv->works.c2hcmd_wq, 0); > @@ -2340,16 +2334,11 @@ void rtl_c2hcmd_launcher(struct ieee80211_hw *hw, int exec) > { > struct rtl_priv *rtlpriv = rtl_priv(hw); > struct sk_buff *skb; > - unsigned long flags; > int i; > > for (i = 0; i < 200; i++) { > /* dequeue a task */ > - spin_lock_irqsave(&rtlpriv->locks.c2hcmd_lock, flags); > - > - skb = __skb_dequeue(&rtlpriv->c2hcmd_queue); > - > - spin_unlock_irqrestore(&rtlpriv->locks.c2hcmd_lock, flags); > + skb = skb_dequeue(&rtlpriv->c2hcmd_queue); > > /* do it */ > if (!skb) > diff --git a/drivers/net/wireless/realtek/rtlwifi/wifi.h b/drivers/net/wireless/realtek/rtlwifi/wifi.h > index 9119144bb5a3..877ed6a1589f 100644 > --- a/drivers/net/wireless/realtek/rtlwifi/wifi.h > +++ b/drivers/net/wireless/realtek/rtlwifi/wifi.h > @@ -2450,7 +2450,6 @@ struct rtl_locks { > spinlock_t waitq_lock; > spinlock_t entry_list_lock; > spinlock_t usb_lock; > - spinlock_t c2hcmd_lock; > spinlock_t scan_list_lock; /* lock for the scan list */ > > /*FW clock change */ > Acked-by: Larry Finger <Larry.Finger@lwfinger.net> Thanks, Larry
Christophe JAILLET <christophe.jaillet@wanadoo.fr> wrote: > The 'c2hcmd_lock' spinlock is only used to protect some __skb_queue_tail() > and __skb_dequeue() calls. > Use the lock provided in the skb itself and call skb_queue_tail() and > skb_dequeue(). These functions already include the correct locking. > > Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> > Acked-by: Larry Finger <Larry.Finger@lwfinger.net> Patch applied to wireless-drivers-next.git, thanks. 1186006adee9 rtlwifi: Simplify locking of a skb list accesses
diff --git a/drivers/net/wireless/realtek/rtlwifi/base.c b/drivers/net/wireless/realtek/rtlwifi/base.c index 6e8bd99e8911..2a7ee90a3f54 100644 --- a/drivers/net/wireless/realtek/rtlwifi/base.c +++ b/drivers/net/wireless/realtek/rtlwifi/base.c @@ -551,7 +551,6 @@ int rtl_init_core(struct ieee80211_hw *hw) spin_lock_init(&rtlpriv->locks.rf_lock); spin_lock_init(&rtlpriv->locks.waitq_lock); spin_lock_init(&rtlpriv->locks.entry_list_lock); - spin_lock_init(&rtlpriv->locks.c2hcmd_lock); spin_lock_init(&rtlpriv->locks.scan_list_lock); spin_lock_init(&rtlpriv->locks.cck_and_rw_pagea_lock); spin_lock_init(&rtlpriv->locks.fw_ps_lock); @@ -2269,7 +2268,6 @@ static bool rtl_c2h_fast_cmd(struct ieee80211_hw *hw, struct sk_buff *skb) void rtl_c2hcmd_enqueue(struct ieee80211_hw *hw, struct sk_buff *skb) { struct rtl_priv *rtlpriv = rtl_priv(hw); - unsigned long flags; if (rtl_c2h_fast_cmd(hw, skb)) { rtl_c2h_content_parsing(hw, skb); @@ -2278,11 +2276,7 @@ void rtl_c2hcmd_enqueue(struct ieee80211_hw *hw, struct sk_buff *skb) } /* enqueue */ - spin_lock_irqsave(&rtlpriv->locks.c2hcmd_lock, flags); - - __skb_queue_tail(&rtlpriv->c2hcmd_queue, skb); - - spin_unlock_irqrestore(&rtlpriv->locks.c2hcmd_lock, flags); + skb_queue_tail(&rtlpriv->c2hcmd_queue, skb); /* wake up wq */ queue_delayed_work(rtlpriv->works.rtl_wq, &rtlpriv->works.c2hcmd_wq, 0); @@ -2340,16 +2334,11 @@ void rtl_c2hcmd_launcher(struct ieee80211_hw *hw, int exec) { struct rtl_priv *rtlpriv = rtl_priv(hw); struct sk_buff *skb; - unsigned long flags; int i; for (i = 0; i < 200; i++) { /* dequeue a task */ - spin_lock_irqsave(&rtlpriv->locks.c2hcmd_lock, flags); - - skb = __skb_dequeue(&rtlpriv->c2hcmd_queue); - - spin_unlock_irqrestore(&rtlpriv->locks.c2hcmd_lock, flags); + skb = skb_dequeue(&rtlpriv->c2hcmd_queue); /* do it */ if (!skb) diff --git a/drivers/net/wireless/realtek/rtlwifi/wifi.h b/drivers/net/wireless/realtek/rtlwifi/wifi.h index 9119144bb5a3..877ed6a1589f 100644 --- a/drivers/net/wireless/realtek/rtlwifi/wifi.h +++ b/drivers/net/wireless/realtek/rtlwifi/wifi.h @@ -2450,7 +2450,6 @@ struct rtl_locks { spinlock_t waitq_lock; spinlock_t entry_list_lock; spinlock_t usb_lock; - spinlock_t c2hcmd_lock; spinlock_t scan_list_lock; /* lock for the scan list */ /*FW clock change */
The 'c2hcmd_lock' spinlock is only used to protect some __skb_queue_tail() and __skb_dequeue() calls. Use the lock provided in the skb itself and call skb_queue_tail() and skb_dequeue(). These functions already include the correct locking. Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> --- drivers/net/wireless/realtek/rtlwifi/base.c | 15 ++------------- drivers/net/wireless/realtek/rtlwifi/wifi.h | 1 - 2 files changed, 2 insertions(+), 14 deletions(-)