diff options
| author | nbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2007-07-26 21:38:35 +0000 |
|---|---|---|
| committer | nbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2007-07-26 21:38:35 +0000 |
| commit | 4921c52586ed5dd46b632e3c364fe7917a39e4d0 (patch) | |
| tree | 7401391f17c5b40af891c62f3fb8bc037e9d42ad /target/linux/adm5120-2.6 | |
| parent | 14a08a0fb2aca744be4d0549ec17f6e40a306c76 (diff) | |
protect the adm5120 pci ops with a spinlock - fixes race conditions that happened in combination with madwifi and more than one card
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@8186 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/adm5120-2.6')
| -rw-r--r-- | target/linux/adm5120-2.6/files/arch/mips/pci/ops-adm5120.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/target/linux/adm5120-2.6/files/arch/mips/pci/ops-adm5120.c b/target/linux/adm5120-2.6/files/arch/mips/pci/ops-adm5120.c index f7e4e6686f..0bd0baa8da 100644 --- a/target/linux/adm5120-2.6/files/arch/mips/pci/ops-adm5120.c +++ b/target/linux/adm5120-2.6/files/arch/mips/pci/ops-adm5120.c @@ -28,6 +28,7 @@ #include <linux/types.h> #include <linux/kernel.h> #include <linux/pci.h> +#include <linux/spinlock.h> #include <asm/mach-adm5120/adm5120_defs.h> @@ -40,6 +41,8 @@ #define PCI_ENABLE 0x80000000 +static spinlock_t pci_lock = SPIN_LOCK_UNLOCKED; + static inline void write_cfgaddr(u32 addr) { *(volatile u32*)KSEG1ADDR(ADM5120_PCICFG_ADDR) = (addr | PCI_ENABLE); @@ -65,8 +68,10 @@ static inline u32 mkaddr(struct pci_bus *bus, unsigned int devfn, int where) static int pci_config_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val) { + unsigned long flags; u32 data; + spin_lock_irqsave(&pci_lock, flags); write_cfgaddr(mkaddr(bus,devfn,where)); data = read_cfgdata(); @@ -90,6 +95,7 @@ static int pci_config_read(struct pci_bus *bus, unsigned int devfn, int where, *val = data; DBG(", 0x%08X returned\n", data); + spin_unlock_irqrestore(&pci_lock, flags); return PCIBIOS_SUCCESSFUL; } @@ -97,9 +103,11 @@ static int pci_config_read(struct pci_bus *bus, unsigned int devfn, int where, static int pci_config_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val) { + unsigned long flags; u32 data; int s; + spin_lock_irqsave(&pci_lock, flags); write_cfgaddr(mkaddr(bus,devfn,where)); data = read_cfgdata(); @@ -124,6 +132,7 @@ static int pci_config_write(struct pci_bus *bus, unsigned int devfn, int where, write_cfgdata(data); DBG(", 0x%08X written\n", data); + spin_unlock_irqrestore(&pci_lock, flags); return PCIBIOS_SUCCESSFUL; } |