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Diffstat (limited to 'drivers/platform/x86/dell-smbios-wmi.c')
-rw-r--r--drivers/platform/x86/dell-smbios-wmi.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/platform/x86/dell-smbios-wmi.c b/drivers/platform/x86/dell-smbios-wmi.c
index 0cab1f9c35af..609557aa5868 100644
--- a/drivers/platform/x86/dell-smbios-wmi.c
+++ b/drivers/platform/x86/dell-smbios-wmi.c
@@ -147,7 +147,10 @@ fail_smbios_cmd:
static int dell_smbios_wmi_probe(struct wmi_device *wdev)
{
+ struct wmi_driver *wdriver =
+ container_of(wdev->dev.driver, struct wmi_driver, driver);
struct wmi_smbios_priv *priv;
+ u32 hotfix;
int count;
int ret;
@@ -164,6 +167,16 @@ static int dell_smbios_wmi_probe(struct wmi_device *wdev)
if (!dell_wmi_get_size(&priv->req_buf_size))
return -EPROBE_DEFER;
+ /* some SMBIOS calls fail unless BIOS contains hotfix */
+ if (!dell_wmi_get_hotfix(&hotfix))
+ return -EPROBE_DEFER;
+ if (!hotfix) {
+ dev_warn(&wdev->dev,
+ "WMI SMBIOS userspace interface not supported(%u), try upgrading to a newer BIOS\n",
+ hotfix);
+ wdriver->filter_callback = NULL;
+ }
+
/* add in the length object we will use internally with ioctl */
priv->req_buf_size += sizeof(u64);
ret = set_required_buffer_size(wdev, priv->req_buf_size);