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| author | Niklas Schnelle <schnelle@linux.ibm.com> | 2020-10-26 10:01:24 +0100 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2020-11-18 12:16:02 +0100 |
| commit | da78693e6e496ccd5cb6b0e9025007803e8f93c2 (patch) | |
| tree | f57f045de099cad940945d4bcec3202b0e5e8e0f /arch/s390/pci | |
| parent | ab177c5d00cda2655fd814356ea034aaf179cf05 (diff) | |
| download | linux-da78693e6e496ccd5cb6b0e9025007803e8f93c2.tar.gz | |
s390/pci: inform when missing required facilities
when we're missing the necessary machine facilities zPCI can not function. Until now it would silently fail to be initialized, add an informational print. Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'arch/s390/pci')
| -rw-r--r-- | arch/s390/pci/pci.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c index 570016ae8bcd..41df8fcfddde 100644 --- a/arch/s390/pci/pci.c +++ b/arch/s390/pci/pci.c @@ -851,8 +851,10 @@ static int __init pci_base_init(void) if (!s390_pci_probe) return 0; - if (!test_facility(69) || !test_facility(71)) + if (!test_facility(69) || !test_facility(71)) { + pr_info("PCI is not supported because CPU facilities 69 or 71 are not available\n"); return 0; + } if (test_facility(153) && !s390_pci_no_mio) { static_branch_enable(&have_mio); |