From: Martin Schwidefsky <schwidefsky@de.ibm.com>
Date: Mon, 6 Feb 2017 14:56:14 +0000 (+0100)
Subject: s390/sclp: single increment assignment control
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=45be0a02f8110a13502fac6167a893c7c0eff432;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

s390/sclp: single increment assignment control

Set a new option bit of the attach command to speed up memory
hotplug.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

diff --git a/drivers/s390/char/sclp_cmd.c b/drivers/s390/char/sclp_cmd.c
index b9c5522b8a68..dff8b94871f0 100644
--- a/drivers/s390/char/sclp_cmd.c
+++ b/drivers/s390/char/sclp_cmd.c
@@ -252,6 +252,7 @@ static int sclp_attach_storage(u8 id)
 	if (!sccb)
 		return -ENOMEM;
 	sccb->header.length = PAGE_SIZE;
+	sccb->header.function_code = 0x40;
 	rc = sclp_sync_request_timeout(0x00080001 | id << 8, sccb,
 				       SCLP_QUEUE_INTERVAL);
 	if (rc)