From: Christian Borntraeger <borntraeger@de.ibm.com>
Date: Tue, 12 Dec 2017 08:08:35 +0000 (+0100)
Subject: serial: forbid 8250 on s390
X-Git-Tag: v4.16-rc1~113^2~45
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=1598e38c0770b08c4d6371b670f9ee61a42ec68b;p=linux.git

serial: forbid 8250 on s390

Using "make kvmconfig" results in a potentially unusable linux image
on s390.  The reason is that both the (default on s390) sclp consoles
as well as the 8250 console register a ttyS<x> as console. Since there
will be no 8250 on s390 let's fence 8250. This will ensure that there
is always a working sclp console.

Reported-by: Alice Frosi <alice@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig
index a5c0ef1e7695..16b1496e6105 100644
--- a/drivers/tty/serial/8250/Kconfig
+++ b/drivers/tty/serial/8250/Kconfig
@@ -5,6 +5,7 @@
 
 config SERIAL_8250
 	tristate "8250/16550 and compatible serial support"
+	depends on !S390
 	select SERIAL_CORE
 	---help---
 	  This selects whether you want to include the driver for the standard