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From ad2855430b1fcbd4566af464120892a32ce7d9f8 Mon Sep 17 00:00:00 2001
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From: Alex Williamson <alex.williamson@redhat.com>
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Date: Fri, 1 May 2015 18:10:44 +0200
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Subject: [PATCH 10/14] vfio-pci: Fix error path sign
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Message-id: <20150501180951.31395.33354.stgit@gimli.home>
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Patchwork-id: 64973
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O-Subject: [RHEL7.2 qemu-kvm PATCH 10/8] vfio-pci: Fix error path sign
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Bugzilla: 1210504
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RH-Acked-by: Bandan Das <bsd@redhat.com>
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RH-Acked-by: Thomas Huth <thuth@redhat.com>
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RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
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This is an impossible error path due to the fact that we're reading a
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kernel provided, rather than user provided link, which will certainly
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always fit in PATH_MAX. Currently it returns a fixed 26 char path
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plus %d group number, which typically maxes out at double digits.
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However, the caller of the initfn certainly expects a less-than zero
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return value on error, not just a non-zero value. Therefore we
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should correct the sign here.
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Reported-by: Laszlo Ersek <lersek@redhat.com>
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Reviewed-by: Laszlo Ersek <lersek@redhat.com>
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Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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hw/misc/vfio.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/hw/misc/vfio.c b/hw/misc/vfio.c
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index e6f96db..118489c 100644
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--- a/hw/misc/vfio.c
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+++ b/hw/misc/vfio.c
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@@ -3870,7 +3870,7 @@ static int vfio_initfn(PCIDevice *pdev)
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len = readlink(path, iommu_group_path, sizeof(path));
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if (len <= 0 || len >= sizeof(path)) {
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error_report("vfio: error no iommu_group for device");
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- return len < 0 ? -errno : ENAMETOOLONG;
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+ return len < 0 ? -errno : -ENAMETOOLONG;
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}
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iommu_group_path[len] = 0;
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--
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1.8.3.1
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