It might happen that some hyp SynIC pages aren't allocated.
Check for that and only then call iounmap().
Signed-off-by: Roman Kisel <romank@xxxxxxxxxxxxxxxxxxx>
Reviewed-by: Tianyu Lan <tiala@xxxxxxxxxxxxx>
Reviewed-by: Michael Kelley <mhklinux@xxxxxxxxxxx>
---
drivers/hv/hv.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index 1e7fd7c19c58..7c5f35806e77 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -372,8 +372,10 @@ void hv_synic_disable_regs(unsigned int cpu)
*/
simp.simp_enabled = 0;
if (ms_hyperv.paravisor_present || hv_root_partition()) {
- iounmap(hv_cpu->hyp_synic_message_page);
- hv_cpu->hyp_synic_message_page = NULL;
+ if (hv_cpu->hyp_synic_message_page) {
+ iounmap(hv_cpu->hyp_synic_message_page);
+ hv_cpu->hyp_synic_message_page = NULL;
+ }
} else {
simp.base_simp_gpa = 0;
}
@@ -384,8 +386,10 @@ void hv_synic_disable_regs(unsigned int cpu)
siefp.siefp_enabled = 0;
if (ms_hyperv.paravisor_present || hv_root_partition()) {
- iounmap(hv_cpu->hyp_synic_event_page);
- hv_cpu->hyp_synic_event_page = NULL;
+ if (hv_cpu->hyp_synic_event_page) {
+ iounmap(hv_cpu->hyp_synic_event_page);
+ hv_cpu->hyp_synic_event_page = NULL;
+ }
} else {
siefp.base_siefp_gpa = 0;
}
--
2.43.0
