diff options
Diffstat (limited to 'drivers/platform/x86/wmi.c')
| -rw-r--r-- | drivers/platform/x86/wmi.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c index 8fb90b726f50..ff4742c40cc3 100644 --- a/drivers/platform/x86/wmi.c +++ b/drivers/platform/x86/wmi.c @@ -1210,6 +1210,7 @@ static void wmi_notify_driver(struct wmi_block *wblock) { struct wmi_driver *driver = drv_to_wdrv(wblock->dev.dev.driver); struct acpi_buffer data = { ACPI_ALLOCATE_BUFFER, NULL }; + union acpi_object *obj = NULL; acpi_status status; if (!driver->no_notify_data) { @@ -1218,12 +1219,18 @@ static void wmi_notify_driver(struct wmi_block *wblock) dev_warn(&wblock->dev.dev, "Failed to get event data\n"); return; } + + obj = data.pointer; + if (!obj) { + dev_warn(&wblock->dev.dev, "Event contains no event data\n"); + return; + } } if (driver->notify) - driver->notify(&wblock->dev, data.pointer); + driver->notify(&wblock->dev, obj); - kfree(data.pointer); + kfree(obj); } static int wmi_notify_device(struct device *dev, void *data) |