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Drop ACPI mutex code

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The observed problems with IT8792E were after all not caused by ACPI
mutex problems, so drop that code for now.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck
2017-08-06 14:06:29 -07:00
parent 485178c1ec
commit ce2074226c
1 changed files with 0 additions and 89 deletions
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89
it87.c
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@@ -77,9 +77,6 @@
#define DRVNAME "it87"
/* Necessary API not (yet) exported in upstream kernel */
/* #define __IT87_USE_ACPI_MUTEX */
enum chips { it87, it8712, it8716, it8718, it8720, it8721, it8728, it8732,
it8771, it8772, it8781, it8782, it8783, it8786, it8790,
it8792, it8603, it8607, it8613, it8620, it8622, it8625, it8628,
@@ -90,10 +87,6 @@ module_param(force_id, ushort, 0);
MODULE_PARM_DESC(force_id, "Override the detected device ID");
static struct platform_device *it87_pdev[2];
#ifdef __IT87_USE_ACPI_MUTEX
static acpi_handle it87_acpi_sio_handle;
static char *it87_acpi_sio_mutex;
#endif
#define REG_2E 0x2e /* The register to read/write */
#define REG_4E 0x4e /* Secondary register to read/write */
@@ -144,17 +137,6 @@ static inline void superio_select(int ioreg, int ldn)
static inline int superio_enter(int ioreg)
{
#ifdef __IT87_USE_ACPI_MUTEX
if (it87_acpi_sio_mutex) {
acpi_status status;
status = acpi_acquire_mutex(NULL, it87_acpi_sio_mutex, 0x10);
if (ACPI_FAILURE(status)) {
pr_err("Failed to acquire ACPI mutex\n");
return -EBUSY;
}
}
#endif
/*
* Try to reserve ioreg and ioreg + 1 for exclusive access.
*/
@@ -165,10 +147,6 @@ static inline int superio_enter(int ioreg)
return 0;
error:
#ifdef __IT87_USE_ACPI_MUTEX
if (it87_acpi_sio_mutex)
acpi_release_mutex(it87_acpi_sio_handle, NULL);
#endif
return -EBUSY;
}
@@ -179,10 +157,6 @@ static inline void superio_exit(int ioreg, bool doexit)
outb(0x02, ioreg + 1);
}
release_region(ioreg, 2);
#ifdef __IT87_USE_ACPI_MUTEX
if (it87_acpi_sio_mutex)
acpi_release_mutex(it87_acpi_sio_handle, NULL);
#endif
}
/* Logical device 4 registers */
@@ -3847,18 +3821,9 @@ exit_device_put:
}
struct it87_dmi_data {
char *sio_mutex; /* SIO ACPI mutex */
u8 skip_pwm; /* pwm channels to skip for this board */
};
/*
* On Gigabyte AB350 and AX370 boards, accesses to the Super-IO chip
* at address 0x2e/0x2f need to be mutex protected.
*/
static struct it87_dmi_data gigabyte_ab350_gaming = {
.sio_mutex = "\\_SB.PCI0.SBRG.SIO1.MUT0",
};
/*
* On the Shuttle SN68PT, FAN_CTL2 is apparently not
* connected to a fan, but to something else. One user
@@ -3872,41 +3837,6 @@ static struct it87_dmi_data nvidia_fn68pt = {
};
static const struct dmi_system_id it87_dmi_table[] __initconst = {
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Gigabyte Technology Co., Ltd."),
DMI_MATCH(DMI_BOARD_NAME, "AB350-Gaming-CF"),
},
.driver_data = &gigabyte_ab350_gaming,
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Gigabyte Technology Co., Ltd."),
DMI_MATCH(DMI_BOARD_NAME, "AB350-Gaming 3-CF"),
},
.driver_data = &gigabyte_ab350_gaming,
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Gigabyte Technology Co., Ltd."),
DMI_MATCH(DMI_BOARD_NAME, "AB350M-D3H-CF"),
},
.driver_data = &gigabyte_ab350_gaming,
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Gigabyte Technology Co., Ltd."),
DMI_MATCH(DMI_BOARD_NAME, "AX370-Gaming K7"),
},
.driver_data = &gigabyte_ab350_gaming,
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Gigabyte Technology Co., Ltd."),
DMI_MATCH(DMI_BOARD_NAME, "AX370-Gaming 5"),
},
.driver_data = &gigabyte_ab350_gaming,
},
{
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "nVIDIA"),
@@ -3930,25 +3860,6 @@ static int __init sm_it87_init(void)
if (dmi)
dmi_data = dmi->driver_data;
if (dmi_data) {
#ifdef __IT87_USE_ACPI_MUTEX
if (dmi_data->sio_mutex) {
static acpi_status status;
status = acpi_get_handle(NULL, dmi_data->sio_mutex,
&it87_acpi_sio_handle);
if (ACPI_SUCCESS(status)) {
it87_acpi_sio_mutex = dmi_data->sio_mutex;
pr_debug("Found ACPI SIO mutex %s\n",
dmi_data->sio_mutex);
} else {
pr_warn("ACPI SIO mutex %s not found\n",
dmi_data->sio_mutex);
}
}
#endif /* __IT87_USE_ACPI_MUTEX */
}
err = platform_driver_register(&it87_driver);
if (err)
return err;