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authorSergey Ryazanov <ryazanov.s.a@gmail.com>2014-08-30 06:06:26 +0400
committerRalf Baechle <ralf@linux-mips.org>2014-11-24 07:44:50 +0100
commit490a0ece6c9d7c39c1e6b523ee488f1c913aace7 (patch)
treee885344d1c3fea6a759c3e5d0bc3608b07e23f98 /arch/mips/pci
parentc4a305374bbf36414515d2ae00d588c67051e67d (diff)
downloadlinux-490a0ece6c9d7c39c1e6b523ee488f1c913aace7.tar.gz
MIPS: pci-ar7{1x, 24}x: 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. 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/7602/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/pci')
-rw-r--r--arch/mips/pci/pci-ar71xx.c13
-rw-r--r--arch/mips/pci/pci-ar724x.c23
2 files changed, 0 insertions, 36 deletions
diff --git a/arch/mips/pci/pci-ar71xx.c b/arch/mips/pci/pci-ar71xx.c
index d471a26dd5f..2b534aea20e 100644
--- a/arch/mips/pci/pci-ar71xx.c
+++ b/arch/mips/pci/pci-ar71xx.c
@@ -50,7 +50,6 @@
struct ar71xx_pci_controller {
void __iomem *cfg_base;
- spinlock_t lock;
int irq;
int irq_base;
struct pci_controller pci_ctrl;
@@ -182,7 +181,6 @@ static int ar71xx_pci_read_config(struct pci_bus *bus, unsigned int devfn,
{
struct ar71xx_pci_controller *apc = pci_bus_to_ar71xx_controller(bus);
void __iomem *base = apc->cfg_base;
- unsigned long flags;
u32 data;
int err;
int ret;
@@ -190,8 +188,6 @@ static int ar71xx_pci_read_config(struct pci_bus *bus, unsigned int devfn,
ret = PCIBIOS_SUCCESSFUL;
data = ~0;
- spin_lock_irqsave(&apc->lock, flags);
-
err = ar71xx_pci_set_cfgaddr(bus, devfn, where, size,
AR71XX_PCI_CFG_CMD_READ);
if (err)
@@ -199,8 +195,6 @@ static int ar71xx_pci_read_config(struct pci_bus *bus, unsigned int devfn,
else
data = __raw_readl(base + AR71XX_PCI_REG_CFG_RDDATA);
- spin_unlock_irqrestore(&apc->lock, flags);
-
*value = (data >> (8 * (where & 3))) & ar71xx_pci_read_mask[size & 7];
return ret;
@@ -211,15 +205,12 @@ static int ar71xx_pci_write_config(struct pci_bus *bus, unsigned int devfn,
{
struct ar71xx_pci_controller *apc = pci_bus_to_ar71xx_controller(bus);
void __iomem *base = apc->cfg_base;
- unsigned long flags;
int err;
int ret;
value = value << (8 * (where & 3));
ret = PCIBIOS_SUCCESSFUL;
- spin_lock_irqsave(&apc->lock, flags);
-
err = ar71xx_pci_set_cfgaddr(bus, devfn, where, size,
AR71XX_PCI_CFG_CMD_WRITE);
if (err)
@@ -227,8 +218,6 @@ static int ar71xx_pci_write_config(struct pci_bus *bus, unsigned int devfn,
else
__raw_writel(value, base + AR71XX_PCI_REG_CFG_WRDATA);
- spin_unlock_irqrestore(&apc->lock, flags);
-
return ret;
}
@@ -360,8 +349,6 @@ static int ar71xx_pci_probe(struct platform_device *pdev)
if (!apc)
return -ENOMEM;
- spin_lock_init(&apc->lock);
-
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cfg_base");
apc->cfg_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(apc->cfg_base))
diff --git a/arch/mips/pci/pci-ar724x.c b/arch/mips/pci/pci-ar724x.c
index 785b2659b51..b7a6fcbb885 100644
--- a/arch/mips/pci/pci-ar724x.c
+++ b/arch/mips/pci/pci-ar724x.c
@@ -9,7 +9,6 @@
* by the Free Software Foundation.
*/
-#include <linux/spinlock.h>
#include <linux/irq.h>
#include <linux/pci.h>
#include <linux/module.h>
@@ -48,8 +47,6 @@ struct ar724x_pci_controller {
bool bar0_is_cached;
u32 bar0_value;
- spinlock_t lock;
-
struct pci_controller pci_controller;
struct resource io_res;
struct resource mem_res;
@@ -75,7 +72,6 @@ pci_bus_to_ar724x_controller(struct pci_bus *bus)
static int ar724x_pci_local_write(struct ar724x_pci_controller *apc,
int where, int size, u32 value)
{
- unsigned long flags;
void __iomem *base;
u32 data;
int s;
@@ -86,8 +82,6 @@ static int ar724x_pci_local_write(struct ar724x_pci_controller *apc,
return PCIBIOS_DEVICE_NOT_FOUND;
base = apc->crp_base;
-
- spin_lock_irqsave(&apc->lock, flags);
data = __raw_readl(base + (where & ~3));
switch (size) {
@@ -105,14 +99,12 @@ static int ar724x_pci_local_write(struct ar724x_pci_controller *apc,
data = value;
break;
default:
- spin_unlock_irqrestore(&apc->lock, flags);
return PCIBIOS_BAD_REGISTER_NUMBER;
}
__raw_writel(data, base + (where & ~3));
/* flush write */
__raw_readl(base + (where & ~3));
- spin_unlock_irqrestore(&apc->lock, flags);
return PCIBIOS_SUCCESSFUL;
}
@@ -121,7 +113,6 @@ static int ar724x_pci_read(struct pci_bus *bus, unsigned int devfn, int where,
int size, uint32_t *value)
{
struct ar724x_pci_controller *apc;
- unsigned long flags;
void __iomem *base;
u32 data;
@@ -133,8 +124,6 @@ static int ar724x_pci_read(struct pci_bus *bus, unsigned int devfn, int where,
return PCIBIOS_DEVICE_NOT_FOUND;
base = apc->devcfg_base;
-
- spin_lock_irqsave(&apc->lock, flags);
data = __raw_readl(base + (where & ~3));
switch (size) {
@@ -153,13 +142,9 @@ static int ar724x_pci_read(struct pci_bus *bus, unsigned int devfn, int where,
case 4:
break;
default:
- spin_unlock_irqrestore(&apc->lock, flags);
-
return PCIBIOS_BAD_REGISTER_NUMBER;
}
- spin_unlock_irqrestore(&apc->lock, flags);
-
if (where == PCI_BASE_ADDRESS_0 && size == 4 &&
apc->bar0_is_cached) {
/* use the cached value */
@@ -175,7 +160,6 @@ static int ar724x_pci_write(struct pci_bus *bus, unsigned int devfn, int where,
int size, uint32_t value)
{
struct ar724x_pci_controller *apc;
- unsigned long flags;
void __iomem *base;
u32 data;
int s;
@@ -209,8 +193,6 @@ static int ar724x_pci_write(struct pci_bus *bus, unsigned int devfn, int where,
}
base = apc->devcfg_base;
-
- spin_lock_irqsave(&apc->lock, flags);
data = __raw_readl(base + (where & ~3));
switch (size) {
@@ -228,15 +210,12 @@ static int ar724x_pci_write(struct pci_bus *bus, unsigned int devfn, int where,
data = value;
break;
default:
- spin_unlock_irqrestore(&apc->lock, flags);
-
return PCIBIOS_BAD_REGISTER_NUMBER;
}
__raw_writel(data, base + (where & ~3));
/* flush write */
__raw_readl(base + (where & ~3));
- spin_unlock_irqrestore(&apc->lock, flags);
return PCIBIOS_SUCCESSFUL;
}
@@ -380,8 +359,6 @@ static int ar724x_pci_probe(struct platform_device *pdev)
if (apc->irq < 0)
return -EINVAL;
- spin_lock_init(&apc->lock);
-
res = platform_get_resource_byname(pdev, IORESOURCE_IO, "io_base");
if (!res)
return -EINVAL;