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Date: Fri, 15 Dec 2017 10:03:01 +0100 From: Paolo Bonzini <pbonzini@...hat.com> To: SF Markus Elfring <elfring@...rs.sourceforge.net>, kvm@...r.kernel.org, Radim Krčmář <rkrcmar@...hat.com> Cc: LKML <linux-kernel@...r.kernel.org>, kernel-janitors@...r.kernel.org Subject: Re: [PATCH] kvm_main: Use common error handling code in kvm_dev_ioctl_create_vm() On 21/11/2017 13:46, SF Markus Elfring wrote: > From: Markus Elfring <elfring@...rs.sourceforge.net> > Date: Tue, 21 Nov 2017 13:40:17 +0100 > > Add a jump target so that a bit of exception handling can be better reused > at the end of this function. > > This issue was detected by using the Coccinelle software. > > Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net> > --- > virt/kvm/kvm_main.c | 21 +++++++++++---------- > 1 file changed, 11 insertions(+), 10 deletions(-) > > diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c > index 39e4db469f2e..c84341c79955 100644 > --- a/virt/kvm/kvm_main.c > +++ b/virt/kvm/kvm_main.c > @@ -3155,21 +3155,18 @@ static int kvm_dev_ioctl_create_vm(unsigned long type) > return PTR_ERR(kvm); > #ifdef CONFIG_KVM_MMIO > r = kvm_coalesced_mmio_init(kvm); > - if (r < 0) { > - kvm_put_kvm(kvm); > - return r; > - } > + if (r < 0) > + goto put_kvm; > #endif > r = get_unused_fd_flags(O_CLOEXEC); > - if (r < 0) { > - kvm_put_kvm(kvm); > - return r; > - } > + if (r < 0) > + goto put_kvm; > + > file = anon_inode_getfile("kvm-vm", &kvm_vm_fops, kvm, O_RDWR); > if (IS_ERR(file)) { > put_unused_fd(r); > - kvm_put_kvm(kvm); > - return PTR_ERR(file); > + r = PTR_ERR(file); > + goto put_kvm; > } > > /* > @@ -3187,6 +3184,10 @@ static int kvm_dev_ioctl_create_vm(unsigned long type) > > fd_install(r, file); > return r; > + > +put_kvm: > + kvm_put_kvm(kvm); > + return r; > } > > static long kvm_dev_ioctl(struct file *filp, > Queued, thanks. Paolo
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