diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/acpi/ec.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 202db575d5db..bf60b24ebf54 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -173,12 +173,17 @@ static int acpi_ec_wait(struct acpi_ec *ec, enum ec_event event, int force_poll) return 0; clear_bit(EC_FLAGS_WAIT_GPE, &ec->flags); if (acpi_ec_check_status(ec, event)) { - if (event == ACPI_EC_EVENT_OBF_1) + 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 + } else { /* missing GPEs, switch back to poll mode */ + printk(KERN_INFO PREFIX "missing IBF_1 confirmations," + "switch off interrupt mode.\n"); clear_bit(EC_FLAGS_GPE_MODE, &ec->flags); + } return 0; } } else { @@ -491,8 +496,12 @@ static u32 acpi_ec_gpe_handler(void *data) if (!test_and_set_bit(EC_FLAGS_QUERY_PENDING, &ec->flags)) status = acpi_os_execute(OSL_EC_BURST_HANDLER, acpi_ec_gpe_query, ec); - } else if (unlikely(!test_bit(EC_FLAGS_GPE_MODE, &ec->flags))) + } else if (unlikely(!test_bit(EC_FLAGS_GPE_MODE, &ec->flags))) { + /* this is non-query, must be confirmation */ + printk(KERN_INFO PREFIX "non-query interrupt received," + " switching to interrupt mode\n"); set_bit(EC_FLAGS_GPE_MODE, &ec->flags); + } return ACPI_SUCCESS(status) ? ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED; @@ -740,6 +749,8 @@ static int acpi_ec_add(struct acpi_device *device) acpi_ec_add_fs(device); printk(KERN_INFO PREFIX "GPE = 0x%lx, I/O: command/status = 0x%lx, data = 0x%lx\n", ec->gpe, ec->command_addr, ec->data_addr); + printk(KERN_INFO PREFIX "driver started in %s mode\n", + (test_bit(EC_FLAGS_GPE_MODE, &ec->flags))?"interrupt":"poll"); return 0; } |