From bcad6e80f3fb0d6724c3814cf32258bbcf1d67db Mon Sep 17 00:00:00 2001 From: David Kilroy Date: Sat, 1 May 2010 14:05:40 +0100 Subject: [PATCH] orinoco: encapsulate driver locking Local bus and USB drivers will need to do locking differently. The original orinoco_usb patches had a boolean variable controlling whether spin_lock_bh was used, or irq based locking. This version provides wrappers for the lock functions and the drivers specify the functions pointers needed. This will introduce a performance penalty, but I'm not expecting it to be noticable. Signed-off-by: David Kilroy Signed-off-by: John W. Linville --- drivers/net/wireless/orinoco/airport.c | 4 ++-- drivers/net/wireless/orinoco/hermes.c | 28 +++++++++++++++++++++++++++- drivers/net/wireless/orinoco/hermes.h | 4 ++++ drivers/net/wireless/orinoco/main.c | 20 ++++++++++---------- drivers/net/wireless/orinoco/orinoco.h | 16 +++++++++++++--- drivers/net/wireless/orinoco/orinoco_cs.c | 4 ++-- drivers/net/wireless/orinoco/spectrum_cs.c | 4 ++-- 7 files changed, 60 insertions(+), 20 deletions(-) diff --git a/drivers/net/wireless/orinoco/airport.c b/drivers/net/wireless/orinoco/airport.c index 7dac5ad..9bcee10 100644 --- a/drivers/net/wireless/orinoco/airport.c +++ b/drivers/net/wireless/orinoco/airport.c @@ -77,9 +77,9 @@ airport_resume(struct macio_dev *mdev) enable_irq(card->irq); - spin_lock_irqsave(&priv->lock, flags); + priv->hw.ops->lock_irqsave(&priv->lock, &flags); err = orinoco_up(priv); - spin_unlock_irqrestore(&priv->lock, flags); + priv->hw.ops->unlock_irqrestore(&priv->lock, &flags); return err; } diff --git a/drivers/net/wireless/orinoco/hermes.c b/drivers/net/wireless/orinoco/hermes.c index a7df524..845693f 100644 --- a/drivers/net/wireless/orinoco/hermes.c +++ b/drivers/net/wireless/orinoco/hermes.c @@ -529,6 +529,28 @@ static int hermes_write_ltv(hermes_t *hw, int bap, u16 rid, return err; } +static void hermes_lock_irqsave(spinlock_t *lock, + unsigned long *flags) __acquires(lock) +{ + spin_lock_irqsave(lock, *flags); +} + +static void hermes_unlock_irqrestore(spinlock_t *lock, + unsigned long *flags) __releases(lock) +{ + spin_unlock_irqrestore(lock, *flags); +} + +static void hermes_lock_irq(spinlock_t *lock) __acquires(lock) +{ + spin_lock_irq(lock); +} + +static void hermes_unlock_irq(spinlock_t *lock) __releases(lock) +{ + spin_unlock_irq(lock); +} + /* Hermes operations for local buses */ static const struct hermes_ops hermes_ops_local = { .init = hermes_init, @@ -538,5 +560,9 @@ static const struct hermes_ops hermes_ops_local = { .read_ltv = hermes_read_ltv, .write_ltv = hermes_write_ltv, .bap_pread = hermes_bap_pread, - .bap_pwrite = hermes_bap_pwrite + .bap_pwrite = hermes_bap_pwrite, + .lock_irqsave = hermes_lock_irqsave, + .unlock_irqrestore = hermes_unlock_irqrestore, + .lock_irq = hermes_lock_irq, + .unlock_irq = hermes_unlock_irq, }; diff --git a/drivers/net/wireless/orinoco/hermes.h b/drivers/net/wireless/orinoco/hermes.h index 18b268c..9e21ecd 100644 --- a/drivers/net/wireless/orinoco/hermes.h +++ b/drivers/net/wireless/orinoco/hermes.h @@ -393,6 +393,10 @@ struct hermes_ops { u16 id, u16 offset); int (*bap_pwrite)(struct hermes *hw, int bap, const void *buf, int len, u16 id, u16 offset); + void (*lock_irqsave)(spinlock_t *lock, unsigned long *flags); + void (*unlock_irqrestore)(spinlock_t *lock, unsigned long *flags); + void (*lock_irq)(spinlock_t *lock); + void (*unlock_irq)(spinlock_t *lock); }; /* Basic control structure */ diff --git a/drivers/net/wireless/orinoco/main.c b/drivers/net/wireless/orinoco/main.c index 7acb6bc..36c4ba8 100644 --- a/drivers/net/wireless/orinoco/main.c +++ b/drivers/net/wireless/orinoco/main.c @@ -281,13 +281,13 @@ int orinoco_stop(struct net_device *dev) /* We mustn't use orinoco_lock() here, because we need to be able to close the interface even if hw_unavailable is set (e.g. as we're released after a PC Card removal) */ - spin_lock_irq(&priv->lock); + orinoco_lock_irq(priv); priv->open = 0; err = __orinoco_down(priv); - spin_unlock_irq(&priv->lock); + orinoco_unlock_irq(priv); return err; } @@ -1741,7 +1741,7 @@ void orinoco_reset(struct work_struct *work) } /* This has to be called from user context */ - spin_lock_irq(&priv->lock); + orinoco_lock_irq(priv); priv->hw_unavailable--; @@ -1756,7 +1756,7 @@ void orinoco_reset(struct work_struct *work) dev->trans_start = jiffies; } - spin_unlock_irq(&priv->lock); + orinoco_unlock_irq(priv); return; disable: @@ -2073,9 +2073,9 @@ int orinoco_init(struct orinoco_private *priv) /* Make the hardware available, as long as it hasn't been * removed elsewhere (e.g. by PCMCIA hot unplug) */ - spin_lock_irq(&priv->lock); + orinoco_lock_irq(priv); priv->hw_unavailable--; - spin_unlock_irq(&priv->lock); + orinoco_unlock_irq(priv); dev_dbg(dev, "Ready\n"); @@ -2317,7 +2317,7 @@ int orinoco_up(struct orinoco_private *priv) unsigned long flags; int err; - spin_lock_irqsave(&priv->lock, flags); + priv->hw.ops->lock_irqsave(&priv->lock, &flags); err = orinoco_reinit_firmware(priv); if (err) { @@ -2337,7 +2337,7 @@ int orinoco_up(struct orinoco_private *priv) } exit: - spin_unlock_irqrestore(&priv->lock, flags); + priv->hw.ops->unlock_irqrestore(&priv->lock, &flags); return 0; } @@ -2349,7 +2349,7 @@ void orinoco_down(struct orinoco_private *priv) unsigned long flags; int err; - spin_lock_irqsave(&priv->lock, flags); + priv->hw.ops->lock_irqsave(&priv->lock, &flags); err = __orinoco_down(priv); if (err) printk(KERN_WARNING "%s: Error %d downing interface\n", @@ -2357,7 +2357,7 @@ void orinoco_down(struct orinoco_private *priv) netif_device_detach(dev); priv->hw_unavailable++; - spin_unlock_irqrestore(&priv->lock, flags); + priv->hw.ops->unlock_irqrestore(&priv->lock, &flags); } EXPORT_SYMBOL(orinoco_down); diff --git a/drivers/net/wireless/orinoco/orinoco.h b/drivers/net/wireless/orinoco/orinoco.h index f1901d6..80a1386 100644 --- a/drivers/net/wireless/orinoco/orinoco.h +++ b/drivers/net/wireless/orinoco/orinoco.h @@ -212,11 +212,11 @@ void orinoco_tx_timeout(struct net_device *dev); static inline int orinoco_lock(struct orinoco_private *priv, unsigned long *flags) { - spin_lock_irqsave(&priv->lock, *flags); + priv->hw.ops->lock_irqsave(&priv->lock, flags); if (priv->hw_unavailable) { DEBUG(1, "orinoco_lock() called with hw_unavailable (dev=%p)\n", priv->ndev); - spin_unlock_irqrestore(&priv->lock, *flags); + priv->hw.ops->unlock_irqrestore(&priv->lock, flags); return -EBUSY; } return 0; @@ -225,7 +225,17 @@ static inline int orinoco_lock(struct orinoco_private *priv, static inline void orinoco_unlock(struct orinoco_private *priv, unsigned long *flags) { - spin_unlock_irqrestore(&priv->lock, *flags); + priv->hw.ops->unlock_irqrestore(&priv->lock, flags); +} + +static inline void orinoco_lock_irq(struct orinoco_private *priv) +{ + priv->hw.ops->lock_irq(&priv->lock); +} + +static inline void orinoco_unlock_irq(struct orinoco_private *priv) +{ + priv->hw.ops->unlock_irq(&priv->lock); } /*** Navigate from net_device to orinoco_private ***/ diff --git a/drivers/net/wireless/orinoco/orinoco_cs.c b/drivers/net/wireless/orinoco/orinoco_cs.c index 525f74e..f99b13b 100644 --- a/drivers/net/wireless/orinoco/orinoco_cs.c +++ b/drivers/net/wireless/orinoco/orinoco_cs.c @@ -327,9 +327,9 @@ orinoco_cs_release(struct pcmcia_device *link) /* We're committed to taking the device away now, so mark the * hardware as unavailable */ - spin_lock_irqsave(&priv->lock, flags); + priv->hw.ops->lock_irqsave(&priv->lock, &flags); priv->hw_unavailable++; - spin_unlock_irqrestore(&priv->lock, flags); + priv->hw.ops->unlock_irqrestore(&priv->lock, &flags); pcmcia_disable_device(link); if (priv->hw.iobase) diff --git a/drivers/net/wireless/orinoco/spectrum_cs.c b/drivers/net/wireless/orinoco/spectrum_cs.c index 77b5871..b4f68ef 100644 --- a/drivers/net/wireless/orinoco/spectrum_cs.c +++ b/drivers/net/wireless/orinoco/spectrum_cs.c @@ -405,9 +405,9 @@ spectrum_cs_release(struct pcmcia_device *link) /* We're committed to taking the device away now, so mark the * hardware as unavailable */ - spin_lock_irqsave(&priv->lock, flags); + priv->hw.ops->lock_irqsave(&priv->lock, &flags); priv->hw_unavailable++; - spin_unlock_irqrestore(&priv->lock, flags); + priv->hw.ops->unlock_irqrestore(&priv->lock, &flags); pcmcia_disable_device(link); if (priv->hw.iobase) -- 2.7.4