Merge tag 'scmi-fixes-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux into fixes

SCMI fix for v4.17

A single patch to ensure that the scmi device is not used for setting up
scmi handle after it's freed(fixes use after free).

* tag 'scmi-fixes-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux:
  firmware: arm_scmi: Use after free in scmi_create_protocol_device()

Signed-off-by: Olof Johansson <olof@lixom.net>

drivers/firmware/arm_scmi/driver.c

@@ -778,6 +778,7 @@ scmi_create_protocol_device(struct device_node *np, struct scmi_info *info,
 	if (scmi_mbox_chan_setup(info, &sdev->dev, prot_id)) {
 		dev_err(&sdev->dev, "failed to setup transport\n");
 		scmi_device_destroy(sdev);
+		return;
 	}
 
 	/* setup handle now as the transport is ready */