linux-toradex.git/drivers/virtio/virtio.c, branch v4.10

virtio: fix memory leak of virtio ida cache layers

2015-12-07T15:28:01+00:00

The virtio core uses a static ida named virtio_index_ida for
assigning index numbers to virtio devices during registration.
The ida core may allocate some internal idr cache layers and
an ida bitmap upon any ida allocation, and all these layers are
truely freed only upon the ida destruction. The virtio_index_ida
is not destroyed at present, leading to a memory leak when using
the virtio core as a module and atleast one virtio device is
registered and unregistered.

Fix this by invoking ida_destroy() in the virtio core module
exit.

Cc: stable@vger.kernel.org
Signed-off-by: Suman Anna 
Signed-off-by: Michael S. Tsirkin

virtio: drop virtio_device_is_legacy_only

2015-04-15T03:11:14+00:00

virtio_device_is_legacy_only is now unused, drop
it from core.

Signed-off-by: Michael S. Tsirkin 
Reviewed-by: Cornelia Huck 
Signed-off-by: Rusty Russell

virtio: balloon might not be a legacy device

2015-04-15T03:11:11+00:00

We added transitional device support to balloon driver,
so we don't need to black-list it in core anymore.

Signed-off-by: Michael S. Tsirkin 
Reviewed-by: Cornelia Huck 
Signed-off-by: Rusty Russell

virtio: don't set VIRTIO_CONFIG_S_DRIVER_OK twice.

2015-02-17T05:49:29+00:00

I noticed this with the console device.  It's not *wrong*, just a bit
weird.

Signed-off-by: Rusty Russell

virtio: set VIRTIO_CONFIG_S_FEATURES_OK on restore

2014-12-11T18:04:38+00:00

virtio 1.0 devices require that drivers set VIRTIO_CONFIG_S_FEATURES_OK
after finalizing features.
virtio core missed doing this on restore, fix it up.

Signed-off-by: Michael S. Tsirkin 
Reviewed-by: Cornelia Huck

virtio: drop legacy_only driver flag

2014-12-09T19:42:00+00:00

legacy_only flag is now unused, drop it from core.

Signed-off-by: Michael S. Tsirkin 
Acked-by: Cornelia Huck

virtio: allow finalize_features to fail

2014-12-09T14:32:32+00:00

This will make it easy for transports to validate features and return
failure.

Signed-off-by: Michael S. Tsirkin

virtio: add API to detect legacy devices

2014-12-09T10:06:33+00:00

transports need to be able to detect legacy-only
devices (ATM balloon only) to use legacy path
to drive them.

Add a core API to do just that.
The implementation just blacklists balloon:
not too pretty, but let's not over-engineer.

Signed-off-by: Michael S. Tsirkin 
Acked-by: Cornelia Huck

virtio: make VIRTIO_F_VERSION_1 a transport bit

2014-12-09T10:06:32+00:00

Activate VIRTIO_F_VERSION_1 automatically unless legacy_only
is set.

Signed-off-by: Michael S. Tsirkin

virtio: add legacy feature table support

2014-12-09T10:05:26+00:00

virtio-blk has some legacy feature bits that modern drivers
must not negotiate, but are needed for old legacy hosts
(that e.g. don't support virtio-scsi).
Allow a separate legacy feature table for such cases.

Signed-off-by: Michael S. Tsirkin 
Reviewed-by: Cornelia Huck