diff options
| author | Helmut Schaa <helmut.schaa@googlemail.com> | 2011-03-03 21:45:16 +0300 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2011-03-04 22:06:48 +0300 |
| commit | 0aa13b2e06fbb8327c7acb4ccf684b2b65c302ce (patch) | |
| tree | 2393be04e8ea1015a8a67b52eaa13b33204aa532 /drivers/net/wireless/rt2x00/rt2400pci.c | |
| parent | 567108ebd352f21640c536ea3b39584f9e7c28f8 (diff) | |
| download | linux-0aa13b2e06fbb8327c7acb4ccf684b2b65c302ce.tar.xz | |
rt2x00: Revise irqmask locking for PCI devices
The PCI device irqmask is locked by a spin_lock. Currently
spin_lock_irqsave is used everywhere. To reduce the locking overhead
replace spin_lock_irqsave in hard irq context with spin_lock and in
soft irq context with spin_lock_irq.
Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/rt2x00/rt2400pci.c')
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt2400pci.c | 15 |
1 files changed, 6 insertions, 9 deletions
diff --git a/drivers/net/wireless/rt2x00/rt2400pci.c b/drivers/net/wireless/rt2x00/rt2400pci.c index 9016c00f2946..80f4988adf80 100644 --- a/drivers/net/wireless/rt2x00/rt2400pci.c +++ b/drivers/net/wireless/rt2x00/rt2400pci.c @@ -1317,27 +1317,25 @@ static void rt2400pci_txdone(struct rt2x00_dev *rt2x00dev, static void rt2400pci_enable_interrupt(struct rt2x00_dev *rt2x00dev, struct rt2x00_field32 irq_field) { - unsigned long flags; u32 reg; /* * Enable a single interrupt. The interrupt mask register * access needs locking. */ - spin_lock_irqsave(&rt2x00dev->irqmask_lock, flags); + spin_lock_irq(&rt2x00dev->irqmask_lock); rt2x00pci_register_read(rt2x00dev, CSR8, ®); rt2x00_set_field32(®, irq_field, 0); rt2x00pci_register_write(rt2x00dev, CSR8, reg); - spin_unlock_irqrestore(&rt2x00dev->irqmask_lock, flags); + spin_unlock_irq(&rt2x00dev->irqmask_lock); } static void rt2400pci_txstatus_tasklet(unsigned long data) { struct rt2x00_dev *rt2x00dev = (struct rt2x00_dev *)data; u32 reg; - unsigned long flags; /* * Handle all tx queues. @@ -1349,7 +1347,7 @@ static void rt2400pci_txstatus_tasklet(unsigned long data) /* * Enable all TXDONE interrupts again. */ - spin_lock_irqsave(&rt2x00dev->irqmask_lock, flags); + spin_lock_irq(&rt2x00dev->irqmask_lock); rt2x00pci_register_read(rt2x00dev, CSR8, ®); rt2x00_set_field32(®, CSR8_TXDONE_TXRING, 0); @@ -1357,7 +1355,7 @@ static void rt2400pci_txstatus_tasklet(unsigned long data) rt2x00_set_field32(®, CSR8_TXDONE_PRIORING, 0); rt2x00pci_register_write(rt2x00dev, CSR8, reg); - spin_unlock_irqrestore(&rt2x00dev->irqmask_lock, flags); + spin_unlock_irq(&rt2x00dev->irqmask_lock); } static void rt2400pci_tbtt_tasklet(unsigned long data) @@ -1378,7 +1376,6 @@ static irqreturn_t rt2400pci_interrupt(int irq, void *dev_instance) { struct rt2x00_dev *rt2x00dev = dev_instance; u32 reg, mask; - unsigned long flags; /* * Get the interrupt sources & saved to local variable. @@ -1420,13 +1417,13 @@ static irqreturn_t rt2400pci_interrupt(int irq, void *dev_instance) * Disable all interrupts for which a tasklet was scheduled right now, * the tasklet will reenable the appropriate interrupts. */ - spin_lock_irqsave(&rt2x00dev->irqmask_lock, flags); + spin_lock(&rt2x00dev->irqmask_lock); rt2x00pci_register_read(rt2x00dev, CSR8, ®); reg |= mask; rt2x00pci_register_write(rt2x00dev, CSR8, reg); - spin_unlock_irqrestore(&rt2x00dev->irqmask_lock, flags); + spin_unlock(&rt2x00dev->irqmask_lock); |