linux-kernel - [PATCH 3/4] KVM-S390: Less function calls in kvm_s390_import_bp

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Message-ID: <47f88a11-b949-28ed-5589-925888a37574@users.sourceforge.net>
Date:	Wed, 17 Aug 2016 20:10:37 +0200
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	kvm@...r.kernel.org, linux-s390@...r.kernel.org,
	Christian Bornträger <borntraeger@...ibm.com>,
	Cornelia Huck <cornelia.huck@...ibm.com>,
	David Hildenbrand <dahi@...ux.vnet.ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Radim Krčmář <rkrcmar@...hat.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH 3/4] KVM-S390: Less function calls in
 kvm_s390_import_bp_data() after error detection

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Wed, 17 Aug 2016 19:25:50 +0200

The kfree() function was called in a few cases by the
kvm_s390_import_bp_data() function during error handling
even if a passed variable contained a null pointer.

Adjust jump targets according to the Linux coding style convention.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 arch/s390/kvm/guestdbg.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/arch/s390/kvm/guestdbg.c b/arch/s390/kvm/guestdbg.c
index 8f886ee..f2514af 100644
--- a/arch/s390/kvm/guestdbg.c
+++ b/arch/s390/kvm/guestdbg.c
@@ -239,7 +239,7 @@ int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
 		wp_info = kmalloc(size, GFP_KERNEL);
 		if (!wp_info) {
 			ret = -ENOMEM;
-			goto error;
+			goto free_bp_data;
 		}
 	}
 	size = nr_bp * sizeof(*bp_info);
@@ -247,7 +247,7 @@ int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
 		bp_info = kmalloc(size, GFP_KERNEL);
 		if (!bp_info) {
 			ret = -ENOMEM;
-			goto error;
+			goto free_wp_info;
 		}
 	}
 
@@ -257,7 +257,7 @@ int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
 			ret = __import_wp_info(vcpu, &bp_data[i],
 					       &wp_info[nr_wp]);
 			if (ret)
-				goto error;
+				goto free_bp_info;
 			nr_wp++;
 			break;
 		case KVM_HW_BP:
@@ -273,10 +273,12 @@ int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
 	vcpu->arch.guestdbg.nr_hw_wp = nr_wp;
 	vcpu->arch.guestdbg.hw_wp_info = wp_info;
 	return 0;
-error:
-	kfree(bp_data);
-	kfree(wp_info);
+free_bp_info:
 	kfree(bp_info);
+free_wp_info:
+	kfree(wp_info);
+free_bp_data:
+	kfree(bp_data);
 	return ret;
 }
 
-- 
2.9.3