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| author | Heiner Kallweit <hkallweit1@gmail.com> | 2021-08-07 00:13:29 +0300 |
|---|---|---|
| committer | Wolfram Sang <wsa@kernel.org> | 2021-08-10 23:36:27 +0300 |
| commit | 1a987c69ce2c5a406f7ef3713d3ed74a1af70c56 (patch) | |
| tree | 480a425769dd3fabf1d8f55534f574c3096a96aa /drivers/i2c | |
| parent | 4e60d5dd10cd82014b26a40519b94444547ec95c (diff) | |
| download | linux-1a987c69ce2c5a406f7ef3713d3ed74a1af70c56.tar.xz | |
i2c: i801: make p2sb_spinlock a mutex
p2sb_spinlock is used in i801_add_tco_spt() only, and in process context
only. Therefore a mutex is sufficient, and we can make the definition
local to i801_add_tco_spt().
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-i801.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c index ef6dbb531a9c..12e0c2ac33c2 100644 --- a/drivers/i2c/busses/i2c-i801.c +++ b/drivers/i2c/busses/i2c-i801.c @@ -110,6 +110,7 @@ #include <linux/platform_device.h> #include <linux/platform_data/itco_wdt.h> #include <linux/pm_runtime.h> +#include <linux/mutex.h> #if IS_ENABLED(CONFIG_I2C_MUX_GPIO) && defined CONFIG_DMI #include <linux/gpio/machine.h> @@ -1492,12 +1493,11 @@ static const struct itco_wdt_platform_data spt_tco_platform_data = { .version = 4, }; -static DEFINE_SPINLOCK(p2sb_spinlock); - static struct platform_device * i801_add_tco_spt(struct i801_priv *priv, struct pci_dev *pci_dev, struct resource *tco_res) { + static DEFINE_MUTEX(p2sb_mutex); struct resource *res; unsigned int devfn; u64 base64_addr; @@ -1510,7 +1510,7 @@ i801_add_tco_spt(struct i801_priv *priv, struct pci_dev *pci_dev, * enumerated by the PCI subsystem, so we need to unhide/hide it * to lookup the P2SB BAR. */ - spin_lock(&p2sb_spinlock); + mutex_lock(&p2sb_mutex); devfn = PCI_DEVFN(PCI_SLOT(pci_dev->devfn), 1); @@ -1528,7 +1528,7 @@ i801_add_tco_spt(struct i801_priv *priv, struct pci_dev *pci_dev, /* Hide the P2SB device, if it was hidden before */ if (hidden) pci_bus_write_config_byte(pci_dev->bus, devfn, 0xe1, hidden); - spin_unlock(&p2sb_spinlock); + mutex_unlock(&p2sb_mutex); res = &tco_res[1]; if (pci_dev->device == PCI_DEVICE_ID_INTEL_DNV_SMBUS) |