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| author | Sergey Ryazanov <ryazanov.s.a@gmail.com> | 2014-08-30 04:06:27 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2014-11-24 07:44:50 +0100 |
| commit | e5067c718b3a6ecc00351861b3655d8cdeb0b6d2 (patch) | |
| tree | a8a1dc4e780cb39c660f82c52253ace8f56df241 /arch/mips/pci | |
| parent | MIPS: pci-ar7{1x, 24}x: remove odd locking in PCI config space access code (diff) | |
| download | linux-e5067c718b3a6ecc00351861b3655d8cdeb0b6d2.tar.xz linux-e5067c718b3a6ecc00351861b3655d8cdeb0b6d2.zip | |
MIPS: pci-rt3883: Remove odd locking in PCI config space access code
Caller (generic PCI code) already do proper locking so no need to add
another one here. Local PCI read/write functions are never called
simultaneously, also they do not require synchronization with the PCI
controller ops, since they are used before the controller registration.
Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Cc: Linux MIPS <linux-mips@linux-mips.org>
Cc: Gabor Juhos <juhosg@openwrt.org>
Patchwork: https://patchwork.linux-mips.org/patch/7603/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/pci')
| -rw-r--r-- | arch/mips/pci/pci-rt3883.c | 9 |
1 files changed, 0 insertions, 9 deletions
diff --git a/arch/mips/pci/pci-rt3883.c b/arch/mips/pci/pci-rt3883.c index 72919aeef42b..0bcc0b1cfddc 100644 --- a/arch/mips/pci/pci-rt3883.c +++ b/arch/mips/pci/pci-rt3883.c @@ -61,7 +61,6 @@ struct rt3883_pci_controller { void __iomem *base; - spinlock_t lock; struct device_node *intc_of_node; struct irq_domain *irq_domain; @@ -111,10 +110,8 @@ static u32 rt3883_pci_read_cfg32(struct rt3883_pci_controller *rpc, address = rt3883_pci_get_cfgaddr(bus, slot, func, reg); - spin_lock_irqsave(&rpc->lock, flags); rt3883_pci_w32(rpc, address, RT3883_PCI_REG_CFGADDR); ret = rt3883_pci_r32(rpc, RT3883_PCI_REG_CFGDATA); - spin_unlock_irqrestore(&rpc->lock, flags); return ret; } @@ -128,10 +125,8 @@ static void rt3883_pci_write_cfg32(struct rt3883_pci_controller *rpc, address = rt3883_pci_get_cfgaddr(bus, slot, func, reg); - spin_lock_irqsave(&rpc->lock, flags); rt3883_pci_w32(rpc, address, RT3883_PCI_REG_CFGADDR); rt3883_pci_w32(rpc, val, RT3883_PCI_REG_CFGDATA); - spin_unlock_irqrestore(&rpc->lock, flags); } static void rt3883_pci_irq_handler(unsigned int irq, struct irq_desc *desc) @@ -252,10 +247,8 @@ static int rt3883_pci_config_read(struct pci_bus *bus, unsigned int devfn, address = rt3883_pci_get_cfgaddr(bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn), where); - spin_lock_irqsave(&rpc->lock, flags); rt3883_pci_w32(rpc, address, RT3883_PCI_REG_CFGADDR); data = rt3883_pci_r32(rpc, RT3883_PCI_REG_CFGDATA); - spin_unlock_irqrestore(&rpc->lock, flags); switch (size) { case 1: @@ -288,7 +281,6 @@ static int rt3883_pci_config_write(struct pci_bus *bus, unsigned int devfn, address = rt3883_pci_get_cfgaddr(bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn), where); - spin_lock_irqsave(&rpc->lock, flags); rt3883_pci_w32(rpc, address, RT3883_PCI_REG_CFGADDR); data = rt3883_pci_r32(rpc, RT3883_PCI_REG_CFGDATA); @@ -307,7 +299,6 @@ static int rt3883_pci_config_write(struct pci_bus *bus, unsigned int devfn, } rt3883_pci_w32(rpc, data, RT3883_PCI_REG_CFGDATA); - spin_unlock_irqrestore(&rpc->lock, flags); return PCIBIOS_SUCCESSFUL; } |