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orinoco: encapsulate driver locking

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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 <kilroyd@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
David Kilroy 2010-05-01 14:05:40 +01:00 committed by John W. Linville
parent 593ef09c9e
commit bcad6e80f3
7 changed files with 60 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/net/wireless/orinoco/airport.c
View File

@ -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;
}

28
drivers/net/wireless/orinoco/hermes.c
View File

@ -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,
};

4
drivers/net/wireless/orinoco/hermes.h
View File

@ -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 */

20
drivers/net/wireless/orinoco/main.c
View File

@ -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);

16
drivers/net/wireless/orinoco/orinoco.h
View File

@ -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 ***/

4
drivers/net/wireless/orinoco/orinoco_cs.c
View File

@ -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)

4
drivers/net/wireless/orinoco/spectrum_cs.c
View File

@ -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)