X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fdrivers%2Fhv%2Fhv.c;fp=kernel%2Fdrivers%2Fhv%2Fhv.c;h=63194a9a7189e5eb84b12cc699bcb3284c41f137;hb=52f993b8e89487ec9ee15a7fb4979e0f09a45b27;hp=6341be8739ae6e3a4931912a6fcd3139a0314c4c;hpb=c189ccac5702322ed843fe17057035b7222a59b6;p=kvmfornfv.git

diff --git a/kernel/drivers/hv/hv.c b/kernel/drivers/hv/hv.c
index 6341be873..63194a9a7 100644
--- a/kernel/drivers/hv/hv.c
+++ b/kernel/drivers/hv/hv.c
@@ -293,8 +293,14 @@ void hv_cleanup(void)
 	 * Cleanup the TSC page based CS.
 	 */
 	if (ms_hyperv.features & HV_X64_MSR_REFERENCE_TSC_AVAILABLE) {
-		clocksource_change_rating(&hyperv_cs_tsc, 10);
-		clocksource_unregister(&hyperv_cs_tsc);
+		/*
+		 * Crash can happen in an interrupt context and unregistering
+		 * a clocksource is impossible and redundant in this case.
+		 */
+		if (!oops_in_progress) {
+			clocksource_change_rating(&hyperv_cs_tsc, 10);
+			clocksource_unregister(&hyperv_cs_tsc);
+		}
 
 		hypercall_msr.as_uint64 = 0;
 		wrmsrl(HV_X64_MSR_REFERENCE_TSC, hypercall_msr.as_uint64);