diff options
| author | Markus Elfring <elfring@users.sourceforge.net> | 2016-08-28 17:34:46 +0200 |
|---|---|---|
| committer | Paul Mackerras <paulus@ozlabs.org> | 2016-09-12 10:12:46 +1000 |
| commit | 46d4e7479252d3fd82a0ea121daef75164a91939 (patch) | |
| tree | 5145adab0abec1bc16384e036e53d2597683426c /arch/powerpc/kvm | |
| parent | f3c0ce86a8da6a43c3551a2223abd42040316dd8 (diff) | |
KVM: PPC: e500: Less function calls in kvm_vcpu_ioctl_config_tlb() after error detection
The kfree() function was called in two cases by the
kvm_vcpu_ioctl_config_tlb() function during error handling
even if the passed data structure element contained a null pointer.
* Split a condition check for memory allocation failures.
* Adjust jump targets according to the Linux coding style convention.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Diffstat (limited to 'arch/powerpc/kvm')
| -rw-r--r-- | arch/powerpc/kvm/e500_mmu.c | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/arch/powerpc/kvm/e500_mmu.c b/arch/powerpc/kvm/e500_mmu.c index 26f373710a25..b65a894b0d64 100644 --- a/arch/powerpc/kvm/e500_mmu.c +++ b/arch/powerpc/kvm/e500_mmu.c @@ -785,35 +785,39 @@ int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu, ret = get_user_pages_fast(cfg->array, num_pages, 1, pages); if (ret < 0) - goto err_pages; + goto free_pages; if (ret != num_pages) { num_pages = ret; ret = -EFAULT; - goto err_put_page; + goto put_pages; } virt = vmap(pages, num_pages, VM_MAP, PAGE_KERNEL); if (!virt) { ret = -ENOMEM; - goto err_put_page; + goto put_pages; } privs[0] = kzalloc(sizeof(struct tlbe_priv) * params.tlb_sizes[0], GFP_KERNEL); + if (!privs[0]) { + ret = -ENOMEM; + goto put_pages; + } + privs[1] = kzalloc(sizeof(struct tlbe_priv) * params.tlb_sizes[1], GFP_KERNEL); - - if (!privs[0] || !privs[1]) { + if (!privs[1]) { ret = -ENOMEM; - goto err_privs; + goto free_privs_first; } g2h_bitmap = kzalloc(sizeof(u64) * params.tlb_sizes[1], GFP_KERNEL); if (!g2h_bitmap) { ret = -ENOMEM; - goto err_privs; + goto free_privs_second; } free_gtlb(vcpu_e500); @@ -845,16 +849,14 @@ int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu, kvmppc_recalc_tlb1map_range(vcpu_e500); return 0; - -err_privs: - kfree(privs[0]); + free_privs_second: kfree(privs[1]); - -err_put_page: + free_privs_first: + kfree(privs[0]); + put_pages: for (i = 0; i < num_pages; i++) put_page(pages[i]); - -err_pages: + free_pages: kfree(pages); return ret; } |