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path: root/drivers/acpi/ec.c
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Diffstat (limited to 'drivers/acpi/ec.c')
-rw-r--r--drivers/acpi/ec.c35
1 files changed, 13 insertions, 22 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 390f8f8666d..06b78e5e33a 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -75,8 +75,7 @@ enum {
EC_FLAGS_WAIT_GPE = 0, /* Don't check status until GPE arrives */
EC_FLAGS_QUERY_PENDING, /* Query is pending */
EC_FLAGS_GPE_MODE, /* Expect GPE to be sent for status change */
- EC_FLAGS_NO_ADDRESS_GPE, /* Expect GPE only for non-address event */
- EC_FLAGS_ADDRESS, /* Address is being written */
+ EC_FLAGS_ONLY_IBF_GPE, /* Expect GPE only for IBF = 0 event */
};
static int acpi_ec_remove(struct acpi_device *device, int type);
@@ -167,45 +166,38 @@ static inline int acpi_ec_check_status(struct acpi_ec *ec, enum ec_event event)
static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event, int force_poll)
{
- int ret = 0;
- if (unlikely(test_bit(EC_FLAGS_ADDRESS, &ec->flags) &&
- test_bit(EC_FLAGS_NO_ADDRESS_GPE, &ec->flags)))
- force_poll = 1;
if (likely(test_bit(EC_FLAGS_GPE_MODE, &ec->flags)) &&
likely(!force_poll)) {
if (wait_event_timeout(ec->wait, acpi_ec_check_status(ec, event),
msecs_to_jiffies(ACPI_EC_DELAY)))
- goto end;
+ return 0;
clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags);
if (acpi_ec_check_status(ec, event)) {
- if (test_bit(EC_FLAGS_ADDRESS, &ec->flags)) {
- /* miss address GPE, don't expect it anymore */
- printk(KERN_INFO PREFIX "missing address confirmation,"
- "don't expect it any longer.\n");
- set_bit(EC_FLAGS_NO_ADDRESS_GPE, &ec->flags);
+ if (event == ACPI_EC_EVENT_OBF_1) {
+ /* miss OBF = 1 GPE, don't expect it anymore */
+ printk(KERN_INFO PREFIX "missing OBF_1 confirmation,"
+ "switching to degraded mode.\n");
+ set_bit(EC_FLAGS_ONLY_IBF_GPE, &ec->flags);
} else {
/* missing GPEs, switch back to poll mode */
- printk(KERN_INFO PREFIX "missing confirmations,"
+ printk(KERN_INFO PREFIX "missing IBF_1 confirmations,"
"switch off interrupt mode.\n");
clear_bit(EC_FLAGS_GPE_MODE, &ec->flags);
}
- goto end;
+ return 0;
}
} else {
unsigned long delay = jiffies + msecs_to_jiffies(ACPI_EC_DELAY);
clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags);
while (time_before(jiffies, delay)) {
if (acpi_ec_check_status(ec, event))
- goto end;
+ return 0;
}
}
printk(KERN_ERR PREFIX "acpi_ec_wait timeout,"
" status = %d, expect_event = %d\n",
acpi_ec_read_status(ec), event);
- ret = -ETIME;
- end:
- clear_bit(EC_FLAGS_ADDRESS, &ec->flags);
- return ret;
+ return -ETIME;
}
static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command,
@@ -224,9 +216,6 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command,
"write_cmd timeout, command = %d\n", command);
goto end;
}
- /* mark the address byte written to EC */
- if (rdata_len + wdata_len > 1)
- set_bit(EC_FLAGS_ADDRESS, &ec->flags);
set_bit(EC_FLAGS_WAIT_GPE, &ec->flags);
acpi_ec_write_data(ec, *(wdata++));
}
@@ -242,6 +231,8 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command,
clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags);
for (; rdata_len > 0; --rdata_len) {
+ if (test_bit(EC_FLAGS_ONLY_IBF_GPE, &ec->flags))
+ force_poll = 1;
result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1, force_poll);
if (result) {
printk(KERN_ERR PREFIX "read timeout, command = %d\n",