[PATCH] platform/x86: dell-wmi: check for kmalloc() errors

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This allocation won't fail in the current kernel because it's small but
not checking for kmalloc() failures introduces static checker warnings
so let's fix it.

Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

diff --git a/drivers/platform/x86/dell-wmi.c b/drivers/platform/x86/dell-wmi.c
index 39d2f4518483..fb25b20df316 100644
--- a/drivers/platform/x86/dell-wmi.c
+++ b/drivers/platform/x86/dell-wmi.c
@@ -639,6 +639,8 @@ static int dell_wmi_events_set_enabled(bool enable)
 	int ret;
 
 	buffer = kzalloc(sizeof(struct calling_interface_buffer), GFP_KERNEL);
+	if (!buffer)
+		return -ENOMEM;
 	buffer->cmd_class = CLASS_INFO;
 	buffer->cmd_select = SELECT_APP_REGISTRATION;
 	buffer->input[0] = 0x10000;
--
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