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From d6d48e0a9ce4dfc91085e450f2a9a334b1ece89b Mon Sep 17 00:00:00 2001
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From: Alex Williamson <alex.williamson@redhat.com>
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Date: Fri, 10 Apr 2015 16:33:51 +0200
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Subject: [PATCH 03/14] vfio: Correction in vfio_rom_read when attempting rom
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loading
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Message-id: <20150410163351.15324.30965.stgit@gimli.home>
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Patchwork-id: 64785
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O-Subject: [RHEL7.2 qemu-kvm PATCH 3/8] vfio: Correction in vfio_rom_read when attempting rom loading
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Bugzilla: 1210503
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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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RH-Acked-by: Bandan Das <bsd@redhat.com>
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From: Bandan Das <bsd@redhat.com>
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Upstream: db01eedb6d883a1fed5b4079f8a6ff048b9c1217
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commit e638073c569e801ce9de added a flag to track whether
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a previous rom read had failed. Accidentally, the code
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ended up adding vfio_load_option_rom twice. (Thanks to Alex
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for spotting it)
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Signed-off-by: Bandan Das <bsd@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 | 5 +----
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1 file changed, 1 insertion(+), 4 deletions(-)
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diff --git a/hw/misc/vfio.c b/hw/misc/vfio.c
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index f3bf491..57bc974 100644
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--- a/hw/misc/vfio.c
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+++ b/hw/misc/vfio.c
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@@ -1235,11 +1235,8 @@ static uint64_t vfio_rom_read(void *opaque, hwaddr addr, unsigned size)
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uint64_t val = ((uint64_t)1 << (size * 8)) - 1;
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/* Load the ROM lazily when the guest tries to read it */
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- if (unlikely(!vdev->rom)) {
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+ if (unlikely(!vdev->rom && !vdev->rom_read_failed)) {
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vfio_pci_load_rom(vdev);
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- if (unlikely(!vdev->rom && !vdev->rom_read_failed)) {
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- vfio_pci_load_rom(vdev);
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- }
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}
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memcpy(&val, vdev->rom + addr,
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--
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1.8.3.1
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