diff options
Diffstat (limited to 'Revert-KVM-Don-t-accept-obviously-wrong-gsi-values-via-KVM_IRQFD.patch')
| -rw-r--r-- | Revert-KVM-Don-t-accept-obviously-wrong-gsi-values-via-KVM_IRQFD.patch | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/Revert-KVM-Don-t-accept-obviously-wrong-gsi-values-via-KVM_IRQFD.patch b/Revert-KVM-Don-t-accept-obviously-wrong-gsi-values-via-KVM_IRQFD.patch new file mode 100644 index 000000000..ebebceb9e --- /dev/null +++ b/Revert-KVM-Don-t-accept-obviously-wrong-gsi-values-via-KVM_IRQFD.patch @@ -0,0 +1,46 @@ +From patchwork Sat Sep 16 20:12:24 2017 +Content-Type: text/plain; charset="utf-8" +MIME-Version: 1.0 +Content-Transfer-Encoding: 8bit +Subject: Revert "KVM: Don't accept obviously wrong gsi values via KVM_IRQFD" +From: =?utf-8?q?Jan_H=2E_Sch=C3=B6nherr?= <jschoenh@amazon.de> +X-Patchwork-Id: 9954473 +Message-Id: <1505592744-31498-1-git-send-email-jschoenh@amazon.de> +To: Paolo Bonzini <pbonzini@redhat.com>, + =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= <rkrcmar@redhat.com> +Cc: =?UTF-8?q?Jan=20H=2E=20Sch=C3=B6nherr?= <jschoenh@amazon.de>, + linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, + sachinp@linux.vnet.ibm.com, + Abdul Haleem <abdhalee@linux.vnet.ibm.com>, kvm@vger.kernel.org +Date: Sat, 16 Sep 2017 22:12:24 +0200 + +This reverts commit 36ae3c0a36b7456432fedce38ae2f7bd3e01a563. + +The commit broke compilation on !CONFIG_HAVE_KVM_IRQ_ROUTING. Also, +there may be cases with CONFIG_HAVE_KVM_IRQ_ROUTING, where larger +gsi values make sense. + +As the commit was meant as an early indicator to user space that +something is wrong, reverting just restores the previous behavior +where overly large values are ignored when encountered (without +any direct feedback). + +Reported-by: Abdul Haleem <abdhalee@linux.vnet.ibm.com> +Signed-off-by: Jan H. Schönherr <jschoenh@amazon.de> +--- + virt/kvm/eventfd.c | 2 -- + 1 file changed, 2 deletions(-) + +diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c +index c608ab4..f2ac53a 100644 +--- a/virt/kvm/eventfd.c ++++ b/virt/kvm/eventfd.c +@@ -565,8 +565,6 @@ kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args) + { + if (args->flags & ~(KVM_IRQFD_FLAG_DEASSIGN | KVM_IRQFD_FLAG_RESAMPLE)) + return -EINVAL; +- if (args->gsi >= KVM_MAX_IRQ_ROUTES) +- return -EINVAL; + + if (args->flags & KVM_IRQFD_FLAG_DEASSIGN) + return kvm_irqfd_deassign(kvm, args); |