s390/ipl: ensure loadparm valid flag is set

[ Upstream commit 15deb080a6087b73089139569558965750e69d67 ]

When loadparm is set in reipl parm block, the kernel should also set
DIAG308_FLAGS_LP_VALID flag.

This fixes loadparm ignoring during z/VM fcp -> ccw reipl and kvm direct
boot -> ccw reipl.

Cc: <stable@vger.kernel.org>
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>

diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index 7963c6aa11965fa28c6a786658d9c90b39c734bf..09548603d7823b085e1333e684cbebacc700c89f 100644 (file)
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -770,6 +770,7 @@ static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
        /* copy and convert to ebcdic */
        memcpy(ipb->hdr.loadparm, buf, lp_len);
        ASCEBC(ipb->hdr.loadparm, LOADPARM_LEN);
+       ipb->hdr.flags |= DIAG308_FLAGS_LP_VALID;
        return len;
 }