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authorPaul Mundt <lethal@linux-sh.org>2010-09-20 13:56:13 +0400
committerPaul Mundt <lethal@linux-sh.org>2010-09-20 13:56:13 +0400
commit39a90865f07f05343c450e91a56578bb8f69c5e8 (patch)
tree1d7b5d8f092af89c65ab5d4fc81cca62765e7917 /arch/sh/drivers/pci/ops-sh4.c
parentc524ebf5a6b78d25219d64a05b3876cde719b5ff (diff)
downloadlinux-39a90865f07f05343c450e91a56578bb8f69c5e8.tar.xz
sh: pci: Use a generic raw spinlock for PCI config access locking.
This copies the pci_config_lock idea from x86 over, allowing us to kill off a couple of existing private locks. At the same time, these need to be converted to raw spinlocks for -rt kernels, so we make that change at the same time. This should make it easier for future parts to get the locking right instead of inevitable ending up with lock type mismatches. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/drivers/pci/ops-sh4.c')
-rw-r--r--arch/sh/drivers/pci/ops-sh4.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/arch/sh/drivers/pci/ops-sh4.c b/arch/sh/drivers/pci/ops-sh4.c
index 0b81999fb88b..b6234203e0ac 100644
--- a/arch/sh/drivers/pci/ops-sh4.c
+++ b/arch/sh/drivers/pci/ops-sh4.c
@@ -9,6 +9,7 @@
*/
#include <linux/pci.h>
#include <linux/io.h>
+#include <linux/spinlock.h>
#include <asm/addrspace.h>
#include "pci-sh4.h"
@@ -18,8 +19,6 @@
#define CONFIG_CMD(bus, devfn, where) \
(0x80000000 | (bus->number << 16) | (devfn << 8) | (where & ~3))
-static DEFINE_SPINLOCK(sh4_pci_lock);
-
/*
* Functions for accessing PCI configuration space with type 1 accesses
*/
@@ -34,10 +33,10 @@ static int sh4_pci_read(struct pci_bus *bus, unsigned int devfn,
* PCIPDR may only be accessed as 32 bit words,
* so we must do byte alignment by hand
*/
- spin_lock_irqsave(&sh4_pci_lock, flags);
+ raw_spin_lock_irqsave(&pci_config_lock, flags);
pci_write_reg(chan, CONFIG_CMD(bus, devfn, where), SH4_PCIPAR);
data = pci_read_reg(chan, SH4_PCIPDR);
- spin_unlock_irqrestore(&sh4_pci_lock, flags);
+ raw_spin_unlock_irqrestore(&pci_config_lock, flags);
switch (size) {
case 1:
@@ -69,10 +68,10 @@ static int sh4_pci_write(struct pci_bus *bus, unsigned int devfn,
int shift;
u32 data;
- spin_lock_irqsave(&sh4_pci_lock, flags);
+ raw_spin_lock_irqsave(&pci_config_lock, flags);
pci_write_reg(chan, CONFIG_CMD(bus, devfn, where), SH4_PCIPAR);
data = pci_read_reg(chan, SH4_PCIPDR);
- spin_unlock_irqrestore(&sh4_pci_lock, flags);
+ raw_spin_unlock_irqrestore(&pci_config_lock, flags);
switch (size) {
case 1: