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s390/ipl: correct ipl parmblock valid checks 

In some cases diag308_set_works used to be misused as "we have valid ipl
parmblock", which is not the case when diag308 set works, but there is
no ipl parmblock (diag308 store returns DIAG308_RC_NOCONFIG). Such checks
are adjusted to reuse ipl_block_valid instead of diag308_set_works.

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>
This commit is contained in:
Vasily Gorbik 2018-04-03 16:03:14 +02:00 committed by Martin Schwidefsky
parent d08091ac96
commit a0832b3aef
1 changed files with 4 additions and 6 deletions
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10
arch/s390/kernel/ipl.c
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@ -334,7 +334,7 @@ size_t append_ipl_vmparm(char *dest, size_t size)
size_t rc;
rc = 0;
if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
if (ipl_block_valid && ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW)
rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
else
dest[0] = 0;
@ -1116,7 +1116,7 @@ static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
/* VM PARM */
if (MACHINE_IS_VM && diag308_set_works &&
if (MACHINE_IS_VM && ipl_block_valid &&
(ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
@ -1835,10 +1835,8 @@ static int __init s390_ipl_init(void)
* case the system is booted from HMC. Fortunately in this case
* READ SCP info provides the correct value.
*/
if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 &&
diag308_set_works)
memcpy(sclp_ipl_info.loadparm, ipl_block.hdr.loadparm,
LOADPARM_LEN);
if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 && ipl_block_valid)
memcpy(sclp_ipl_info.loadparm, ipl_block.hdr.loadparm, LOADPARM_LEN);
shutdown_actions_init();
shutdown_triggers_init();
return 0;