From e4513a57ef719d3d6d1cee0ca4d9f4016aa452bb Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Tue, 28 Mar 2006 17:04:00 -0500 Subject: ACPI: fix sonypi ACPI driver registration to unregister on failure Remove the assumption that acpi_bus_register_driver() returns the number of devices claimed. Returning the count is unreliable because devices may be hot-plugged in the future (admittedly not applicable for this driver). This also fixes a bug: if sonypi_acpi_driver was registered but found no devices, sonypi_exit() did not unregister it. Signed-off-by: Bjorn Helgaas Signed-off-by: Andrew Morton Signed-off-by: Len Brown --- drivers/char/sonypi.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'drivers/char/sonypi.c') diff --git a/drivers/char/sonypi.c b/drivers/char/sonypi.c index f8dd8527c6a..81ce5515b41 100644 --- a/drivers/char/sonypi.c +++ b/drivers/char/sonypi.c @@ -512,7 +512,7 @@ static struct sonypi_device { #ifdef CONFIG_ACPI static struct acpi_device *sonypi_acpi_device; -static int acpi_enabled; +static int acpi_driver_registered; #endif static int sonypi_ec_write(u8 addr, u8 value) @@ -869,7 +869,7 @@ found: sonypi_report_input_event(event); #ifdef CONFIG_ACPI - if (acpi_enabled) + if (sonypi_acpi_device) acpi_bus_generate_event(sonypi_acpi_device, 1, event); #endif @@ -1548,8 +1548,8 @@ static int __init sonypi_init(void) goto err_free_device; #ifdef CONFIG_ACPI - if (acpi_bus_register_driver(&sonypi_acpi_driver) > 0) - acpi_enabled = 1; + if (acpi_bus_register_driver(&sonypi_acpi_driver) >= 0) + acpi_driver_registered = 1; #endif return 0; @@ -1564,7 +1564,7 @@ static int __init sonypi_init(void) static void __exit sonypi_exit(void) { #ifdef CONFIG_ACPI - if (acpi_enabled) + if (acpi_driver_registered) acpi_bus_unregister_driver(&sonypi_acpi_driver); #endif platform_device_unregister(sonypi_platform_device); -- cgit v1.2.3