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ACPI: ec: Query only single query at a time.
Signed-off-by: Len Brown <len.brown@intel.com>
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e41334c0a6
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@ -104,6 +104,7 @@ struct acpi_ec {
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unsigned long data_addr;
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unsigned long global_lock;
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struct semaphore sem;
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atomic_t query_pending;
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atomic_t leaving_burst; /* 0 : No, 1 : Yes, 2: abort */
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wait_queue_head_t wait;
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} *ec_ecdt;
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@ -257,6 +258,8 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command,
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command);
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goto end;
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}
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} else if (command == ACPI_EC_COMMAND_QUERY) {
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atomic_set(&ec->query_pending, 0);
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}
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for (; rdata_len > 0; rdata_len --) {
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@ -425,17 +428,9 @@ static void acpi_ec_gpe_query(void *ec_cxt)
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{
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struct acpi_ec *ec = (struct acpi_ec *)ec_cxt;
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u8 value = 0;
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static char object_name[8];
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char object_name[8];
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if (!ec)
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return;
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value = acpi_ec_read_status(ec);
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if (!(value & ACPI_EC_FLAG_SCI))
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return;
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if (acpi_ec_query(ec, &value))
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if (!ec || acpi_ec_query(ec, &value))
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return;
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snprintf(object_name, 8, "_Q%2.2X", value);
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@ -457,7 +452,8 @@ static u32 acpi_ec_gpe_handler(void *data)
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}
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value = acpi_ec_read_status(ec);
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if (value & ACPI_EC_FLAG_SCI) {
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if ((value & ACPI_EC_FLAG_SCI) && !atomic_read(&ec->query_pending)) {
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atomic_set(&ec->query_pending, 1);
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status = acpi_os_execute(OSL_EC_BURST_HANDLER, acpi_ec_gpe_query, ec);
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}
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@ -652,6 +648,7 @@ static int acpi_ec_add(struct acpi_device *device)
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ec->handle = device->handle;
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ec->uid = -1;
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init_MUTEX(&ec->sem);
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atomic_set(&ec->query_pending, 0);
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if (acpi_ec_mode == EC_INTR) {
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atomic_set(&ec->leaving_burst, 1);
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init_waitqueue_head(&ec->wait);
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