From: "Michael S. Tsirkin" <mst@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: Rusty Russell <rusty@rustcorp.com.au>,
virtualization@lists.linux-foundation.org,
Gerd Hoffmann <kraxel@redhat.com>
Subject: [PATCH pre-squash 13/14] fixup! virtio_pci: add module param to force legacy mode
Date: Wed, 21 Jan 2015 17:00:45 +0200 [thread overview]
Message-ID: <1421852375-22604-14-git-send-email-mst@redhat.com> (raw)
In-Reply-To: <1421852375-22604-1-git-send-email-mst@redhat.com>
virtio modern: fix up fallback logic with force_legacy
This bails out if legacy driver succeeds - not what we wanted.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Gerd Hoffmann <kraxel@redhat.com>
---
drivers/virtio/virtio_pci_common.c | 12 ++++--------
1 file changed, 4 insertions(+), 8 deletions(-)
diff --git a/drivers/virtio/virtio_pci_common.c b/drivers/virtio/virtio_pci_common.c
index 0f87b99..e894eb2 100644
--- a/drivers/virtio/virtio_pci_common.c
+++ b/drivers/virtio/virtio_pci_common.c
@@ -516,18 +516,14 @@ static int virtio_pci_probe(struct pci_dev *pci_dev,
if (force_legacy) {
rc = virtio_pci_legacy_probe(vp_dev);
/* Also try modern mode if we can't map BAR0 (no IO space). */
- if (rc != -ENODEV && rc != -ENOMEM)
- return rc;
-
- rc = virtio_pci_modern_probe(vp_dev);
+ if (rc == -ENODEV || rc == -ENOMEM)
+ rc = virtio_pci_modern_probe(vp_dev);
if (rc)
goto err_probe;
} else {
rc = virtio_pci_modern_probe(vp_dev);
- if (rc != -ENODEV)
- return rc;
-
- rc = virtio_pci_legacy_probe(vp_dev);
+ if (rc == -ENODEV)
+ rc = virtio_pci_legacy_probe(vp_dev);
if (rc)
goto err_probe;
}
--
MST
next prev parent reply other threads:[~2015-01-21 15:01 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-21 15:00 [PATCH pre-squash 00/14] virtio 1.0: virtio-pci fixup Michael S. Tsirkin
2015-01-21 15:00 ` [PATCH pre-squash 01/14] virtio_pci: move probe/remove code to common Michael S. Tsirkin
2015-01-21 15:00 ` [PATCH pre-squash 02/14] virtio-pci: define layout for virtio 1.0 Michael S. Tsirkin
2015-01-21 15:00 ` [PATCH pre-squash 03/14] fixup! " Michael S. Tsirkin
2015-01-21 15:00 ` [PATCH pre-squash 04/14] virtio_pci: modern driver Michael S. Tsirkin
2015-01-21 15:00 ` [PATCH pre-squash 05/14] fixup! " Michael S. Tsirkin
2015-01-21 15:00 ` [PATCH pre-squash 06/14] " Michael S. Tsirkin
2015-01-21 15:00 ` [PATCH pre-squash 07/14] virtio_pci: macros for PCI layout offsets Michael S. Tsirkin
2015-01-21 15:00 ` [PATCH pre-squash 08/14] fixup! " Michael S. Tsirkin
2015-01-21 15:00 ` [PATCH pre-squash 09/14] virtio_pci_modern: reduce number of mappings Michael S. Tsirkin
2015-01-21 15:00 ` [PATCH pre-squash 10/14] virtio_pci_modern: support devices with no config Michael S. Tsirkin
2015-01-21 15:00 ` [PATCH pre-squash 11/14] virtio_pci: add an option to disable legacy driver Michael S. Tsirkin
2015-01-21 15:00 ` [PATCH pre-squash 12/14] virtio_pci: add module param to force legacy mode Michael S. Tsirkin
2015-01-21 15:00 ` Michael S. Tsirkin [this message]
2015-01-21 15:00 ` [PATCH pre-squash 14/14] virtio_pci_modern: drop an unused function Michael S. Tsirkin
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