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authorChris Bainbridge <chris.bainbridge@gmail.com>2015-11-12 22:24:47 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2015-11-17 01:26:45 +0300
commita76032e0abef027df83f7f053580aa297de54818 (patch)
treeb4fe27fd2d499261ffb4d073cd84f18145b2408d /drivers/acpi/sbshc.c
parentadd68d6aa9e2492e51707ca603ada5b26c626757 (diff)
downloadlinux-a76032e0abef027df83f7f053580aa297de54818.tar.xz
Revert "ACPI / SBS: Add 5 us delay to fix SBS hangs on MacBook"
Revert commit 3349fb64b292 (ACPI / SBS: Add 5 us delay to fix SBS hangs on MacBook), since the delay introduced by it is not necessary any more after commit add68d6aa9e2 (ACPI / SMBus: Fix boot stalls / high CPU caused by reentrant code). Signed-off-by: Chris Bainbridge <chris.bainbridge@gmail.com> [ rjw: Changelog ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/sbshc.c')
-rw-r--r--drivers/acpi/sbshc.c22
1 files changed, 0 insertions, 22 deletions
diff --git a/drivers/acpi/sbshc.c b/drivers/acpi/sbshc.c
index e2900518cf7e..2fa8304171e0 100644
--- a/drivers/acpi/sbshc.c
+++ b/drivers/acpi/sbshc.c
@@ -14,7 +14,6 @@
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/interrupt.h>
-#include <linux/dmi.h>
#include "sbshc.h"
#define PREFIX "ACPI: "
@@ -89,8 +88,6 @@ enum acpi_smb_offset {
ACPI_SMB_ALARM_DATA = 0x26, /* 2 bytes alarm data */
};
-static bool macbook;
-
static inline int smb_hc_read(struct acpi_smb_hc *hc, u8 address, u8 *data)
{
return ec_read(hc->offset + address, data);
@@ -121,8 +118,6 @@ static int acpi_smbus_transaction(struct acpi_smb_hc *hc, u8 protocol,
mutex_lock(&hc->lock);
hc->done = false;
- if (macbook)
- udelay(5);
if (smb_hc_read(hc, ACPI_SMB_PROTOCOL, &temp))
goto end;
if (temp) {
@@ -250,29 +245,12 @@ extern int acpi_ec_add_query_handler(struct acpi_ec *ec, u8 query_bit,
acpi_handle handle, acpi_ec_query_func func,
void *data);
-static int macbook_dmi_match(const struct dmi_system_id *d)
-{
- pr_debug("Detected MacBook, enabling workaround\n");
- macbook = true;
- return 0;
-}
-
-static struct dmi_system_id acpi_smbus_dmi_table[] = {
- { macbook_dmi_match, "Apple MacBook", {
- DMI_MATCH(DMI_BOARD_VENDOR, "Apple"),
- DMI_MATCH(DMI_PRODUCT_NAME, "MacBook") },
- },
- { },
-};
-
static int acpi_smbus_hc_add(struct acpi_device *device)
{
int status;
unsigned long long val;
struct acpi_smb_hc *hc;
- dmi_check_system(acpi_smbus_dmi_table);
-
if (!device)
return -EINVAL;