3 files changed, 43 insertions, 21 deletions

diff --git a/arch/x86/kernel/acpi/wakeup_64.S b/arch/x86/kernel/acpi/wakeup_64.S
index bcc293423a7..96258d9dc97 100644
--- a/arch/x86/kernel/acpi/wakeup_64.S
+++ b/arch/x86/kernel/acpi/wakeup_64.S
@@ -13,7 +13,6 @@
          * Hooray, we are in Long 64-bit mode (but still running in low memory)
          */
 ENTRY(wakeup_long64)
-wakeup_long64:
         movq    saved_magic, %rax
         movq    $0x123456789abcdef0, %rdx
         cmpq    %rdx, %rax
@@ -34,16 +33,12 @@ wakeup_long64:
 
         movq    saved_rip, %rax
         jmp     *%rax
+ENDPROC(wakeup_long64)
 
 bogus_64_magic:
         jmp     bogus_64_magic
 
-        .align 2
-        .p2align 4,,15
-.globl do_suspend_lowlevel
-        .type   do_suspend_lowlevel,@function
-do_suspend_lowlevel:
-.LFB5:
+ENTRY(do_suspend_lowlevel)
         subq    $8, %rsp
         xorl    %eax, %eax
         call    save_processor_state
@@ -67,7 +62,7 @@ do_suspend_lowlevel:
         pushfq
         popq    pt_regs_flags(%rax)
 
-        movq    $.L97, saved_rip(%rip)
+        movq    $resume_point, saved_rip(%rip)
 
         movq    %rsp, saved_rsp
         movq    %rbp, saved_rbp
@@ -78,14 +73,12 @@ do_suspend_lowlevel:
         addq    $8, %rsp
         movl    $3, %edi
         xorl    %eax, %eax
-        jmp     acpi_enter_sleep_state
-.L97:
-        .p2align 4,,7
-.L99:
-        .align 4
-        movl    $24, %eax
-        movw    %ax, %ds
+        call    acpi_enter_sleep_state
+        /* in case something went wrong, restore the machine status and go on */
+        jmp     resume_point
 
+        .align 4
+resume_point:
         /* We don't restore %rax, it must be 0 anyway */
         movq    $saved_context, %rax
         movq    saved_context_cr4(%rax), %rbx
@@ -117,12 +110,9 @@ do_suspend_lowlevel:
         xorl    %eax, %eax
         addq    $8, %rsp
         jmp     restore_processor_state
-.LFE5:
-.Lfe5:
-        .size   do_suspend_lowlevel, .Lfe5-do_suspend_lowlevel
-        
+ENDPROC(do_suspend_lowlevel)
+
 .data
-ALIGN
 ENTRY(saved_rbp)        .quad   0
 ENTRY(saved_rsi)        .quad   0
 ENTRY(saved_rdi)        .quad   0
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 65132f92045..69cbc57c2d1 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -138,6 +138,29 @@ static int acpi_battery_technology(struct acpi_battery *battery)
 
 static int acpi_battery_get_state(struct acpi_battery *battery);
 
+static int acpi_battery_is_charged(struct acpi_battery *battery)
+{
+        /* either charging or discharging */
+        if (battery->state != 0)
+                return 0;
+
+        /* battery not reporting charge */
+        if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN ||
+            battery->capacity_now == 0)
+                return 0;
+
+        /* good batteries update full_charge as the batteries degrade */
+        if (battery->full_charge_capacity == battery->capacity_now)
+                return 1;
+
+        /* fallback to using design values for broken batteries */
+        if (battery->design_capacity == battery->capacity_now)
+                return 1;
+
+        /* we don't do any sort of metric based on percentages */
+        return 0;
+}
+
 static int acpi_battery_get_property(struct power_supply *psy,
                                      enum power_supply_property psp,
                                      union power_supply_propval *val)
@@ -155,7 +178,7 @@ static int acpi_battery_get_property(struct power_supply *psy,
                         val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
                 else if (battery->state & 0x02)
                         val->intval = POWER_SUPPLY_STATUS_CHARGING;
-                else if (battery->state == 0)
+                else if (acpi_battery_is_charged(battery))
                         val->intval = POWER_SUPPLY_STATUS_FULL;
                 else
                         val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 5c2f5d343be..2fe15060dcd 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -120,6 +120,8 @@ static struct acpi_ec {
         spinlock_t curr_lock;
 } *boot_ec, *first_ec;
 
+static int EC_FLAGS_MSI; /* Out-of-spec MSI controller */
+
 /* --------------------------------------------------------------------------
                              Transaction Management
    -------------------------------------------------------------------------- */
@@ -259,6 +261,8 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec,
                 clear_bit(EC_FLAGS_GPE_MODE, &ec->flags);
                 acpi_disable_gpe(NULL, ec->gpe);
         }
+        if (EC_FLAGS_MSI)
+                udelay(ACPI_EC_DELAY);
         /* start transaction */
         spin_lock_irqsave(&ec->curr_lock, tmp);
         /* following two actions should be kept atomic */
@@ -967,6 +971,11 @@ int __init acpi_ec_ecdt_probe(void)
         /*
          * Generate a boot ec context
          */
+        if (dmi_name_in_vendors("Micro-Star") ||
+            dmi_name_in_vendors("Notebook")) {
+                pr_info(PREFIX "Enabling special treatment for EC from MSI.\n");
+                EC_FLAGS_MSI = 1;
+        }
         status = acpi_get_table(ACPI_SIG_ECDT, 1,
                                 (struct acpi_table_header **)&ecdt_ptr);
         if (ACPI_SUCCESS(status)) {