x86: move hp-wmi's probe function to .devinit.text
Uwe Kleine-König [Thu, 4 Feb 2010 19:56:52 +0000 (20:56 +0100)]
A pointer to hp_wmi_bios_setup is passed to the core via
platform_driver_register and so the function must not disappear when the
.init sections are discarded.  Otherwise (if also having HOTPLUG=y)
unbinding and binding a device to the driver via sysfs will result in an
oops as does a device being registered late.

An alternative to this patch is using platform_driver_probe instead of
platform_driver_register plus removing the pointer to the probe function
from the struct platform_driver.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Frans Pop <elendil@planet.nl>
Cc: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Len Brown <lenb@kernel.org>
Cc: Helge Deller <deller@gmx.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/platform/x86/hp-wmi.c

index 3aa57da..7ccf33c 100644 (file)
@@ -57,7 +57,7 @@ enum hp_wmi_radio {
        HPWMI_WWAN = 2,
 };
 
-static int __init hp_wmi_bios_setup(struct platform_device *device);
+static int __devinit hp_wmi_bios_setup(struct platform_device *device);
 static int __exit hp_wmi_bios_remove(struct platform_device *device);
 static int hp_wmi_resume_handler(struct device *device);
 
@@ -447,7 +447,7 @@ static void cleanup_sysfs(struct platform_device *device)
        device_remove_file(&device->dev, &dev_attr_tablet);
 }
 
-static int __init hp_wmi_bios_setup(struct platform_device *device)
+static int __devinit hp_wmi_bios_setup(struct platform_device *device)
 {
        int err;
        int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);