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SUSE:SLE-12-SP4:Update
xen.1317
55f9345b-x86-MSI-fail-if-no-hardware-support.patch
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File 55f9345b-x86-MSI-fail-if-no-hardware-support.patch of Package xen.1317
# Commit c7d5d5d8ea1ecbd6ef8b47dace4dec825f0f6e48 # Date 2015-09-16 11:20:27 +0200 # Author Jan Beulich <jbeulich@suse.com> # Committer Jan Beulich <jbeulich@suse.com> x86/MSI: fail if no hardware support This is to guard against buggy callers (luckily Dom0 only) invoking the respective hypercall for a device not being MSI-capable. Signed-off-by: Jan Beulich <jbeulich@suse.com> Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com> --- a/xen/arch/x86/msi.c +++ b/xen/arch/x86/msi.c @@ -696,6 +696,8 @@ static int msi_capability_init(struct pc ASSERT(spin_is_locked(&pcidevs_lock)); pos = pci_find_cap_offset(seg, bus, slot, func, PCI_CAP_ID_MSI); + if ( !pos ) + return -ENODEV; control = pci_conf_read16(seg, bus, slot, func, msi_control_reg(pos)); maxvec = multi_msi_capable(control); if ( nvec > maxvec )
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