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authorMichael S. Tsirkin <mst@redhat.com>2021-09-13 06:38:36 -0400
committerMichael S. Tsirkin <mst@redhat.com>2021-09-14 18:09:57 -0400
commit0d818706130e2f4e828c3fc028917677fac76a09 (patch)
tree6e4a4d37a6fc792300e39fc2ec755d7f1c29b246 /drivers/virtio
parent6880fa6c56601bb8ed59df6c30fd390cc5f6dd8f (diff)
downloadlinux-0d818706130e2f4e828c3fc028917677fac76a09.tar.bz2
virtio: don't fail on !of_device_is_compatible
A recent change checking of_device_is_compatible on probe broke some powerpc/pseries setups. Apparently there virtio devices do not have a "compatible" property - they are matched by PCI vendor/device ids. Let's just skip of_node setup but proceed with initialization like we did previously. Fixes: 694a1116b405 ("virtio: Bind virtio device to device-tree node") Reported-by: Alexey Kardashevskiy <aik@ozlabs.ru> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Viresh Kumar <viresh.kumar@linaro.org> Tested-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Jason Wang <jasowang@redhat.com> Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/virtio')
-rw-r--r--drivers/virtio/virtio.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c
index 588e02fb91d3..0a5b54034d4b 100644
--- a/drivers/virtio/virtio.c
+++ b/drivers/virtio/virtio.c
@@ -345,8 +345,13 @@ static int virtio_device_of_init(struct virtio_device *dev)
ret = snprintf(compat, sizeof(compat), "virtio,device%x", dev->id.device);
BUG_ON(ret >= sizeof(compat));
+ /*
+ * On powerpc/pseries virtio devices are PCI devices so PCI
+ * vendor/device ids play the role of the "compatible" property.
+ * Simply don't init of_node in this case.
+ */
if (!of_device_is_compatible(np, compat)) {
- ret = -EINVAL;
+ ret = 0;
goto out;
}