From 307ab2a99d190d3a7949258b8551b66887ce8cf4 Mon Sep 17 00:00:00 2001 From: Mario Limonciello Date: Sun, 5 Nov 2017 21:34:34 -0600 Subject: [PATCH] platform/x86: dell-smbios-wmi: release mutex lock on WMI call failure Unbound devices may race with calling this function causing the mutex to stay locked. This failure mode should have released the mutex too. Signed-off-by: Mario Limonciello Signed-off-by: Darren Hart (VMware) --- drivers/platform/x86/dell-smbios-wmi.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/platform/x86/dell-smbios-wmi.c b/drivers/platform/x86/dell-smbios-wmi.c index 35c13815b24c..5cf9b13ce6e6 100644 --- a/drivers/platform/x86/dell-smbios-wmi.c +++ b/drivers/platform/x86/dell-smbios-wmi.c @@ -91,8 +91,10 @@ int dell_smbios_wmi_call(struct calling_interface_buffer *buffer) mutex_lock(&call_mutex); priv = get_first_smbios_priv(); - if (!priv) - return -ENODEV; + if (!priv) { + ret = -ENODEV; + goto out_wmi_call; + } size = sizeof(struct calling_interface_buffer); difference = priv->req_buf_size - sizeof(u64) - size; @@ -101,6 +103,7 @@ int dell_smbios_wmi_call(struct calling_interface_buffer *buffer) memcpy(&priv->buf->std, buffer, size); ret = run_smbios_call(priv->wdev); memcpy(buffer, &priv->buf->std, size); +out_wmi_call: mutex_unlock(&call_mutex); return ret; -- 2.30.2