Kernel/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2025-01-09 06:33:34 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

s390/zcrypt: CCA control CPRB sending

Browse Source 
When sending a CCA CPRB to a control domain, the CPRB has to be sent via a
usage domain.  Previous code used the default domain to route this message.
If the default domain is not online and ready to send the CPRB, the ioctl will
fail even if other usage domains could be used to send the CPRB.

To improve this, instead of using the default domain, switch to auto-select of
the domain.

Signed-off-by: Juergen Christ <jchrist@linux.ibm.com>
Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Juergen Christ 2021-11-22 14:01:34 +01:00 committed by Heiko Carstens
parent 248420797d
commit cff2d3abc8
1 changed files with 3 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/s390/crypto/zcrypt_api.c
View File

@ -878,14 +878,13 @@ static long _zcrypt_send_cprb(bool userspace, struct ap_perms *perms,
/*
* If a valid target domain is set and this domain is NOT a usage
* domain but a control only domain, use the default domain as target.
* domain but a control only domain, autoselect target domain.
*/
tdom = *domain;
if (tdom < AP_DOMAINS &&
!ap_test_config_usage_domain(tdom) &&
ap_test_config_ctrl_domain(tdom) &&
ap_domain_index >= 0)
tdom = ap_domain_index;
ap_test_config_ctrl_domain(tdom))
tdom = AUTOSEL_DOM;
pref_zc = NULL;
pref_zq = NULL;