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virtio-mmio: Convert to platform remove callback returning void

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The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart
from emitting a warning) and this typically results in resource leaks.

To improve here there is a quest to make the remove callback return
void. In the first step of this quest all drivers are converted to
.remove_new(), which already returns void. Eventually after all drivers
are converted, .remove_new() will be renamed to .remove().

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Message-Id: <ef71f955531d5e41b20d801e1149bb08d155679a.1709886922.git.u.kleine-koenig@pengutronix.de>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Uwe Kleine-König 2024-03-08 09:51:20 +01:00 committed by Michael S. Tsirkin
parent 4d5569314d
commit e117d9b6e7
1 changed files with 2 additions and 4 deletions
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6
drivers/virtio/virtio_mmio.c
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@ -696,12 +696,10 @@ free_vm_dev:
return rc;
}
static int virtio_mmio_remove(struct platform_device *pdev)
static void virtio_mmio_remove(struct platform_device *pdev)
{
struct virtio_mmio_device *vm_dev = platform_get_drvdata(pdev);
unregister_virtio_device(&vm_dev->vdev);
return 0;
}
@ -847,7 +845,7 @@ MODULE_DEVICE_TABLE(acpi, virtio_mmio_acpi_match);
static struct platform_driver virtio_mmio_driver = {
.probe = virtio_mmio_probe,
.remove = virtio_mmio_remove,
.remove_new = virtio_mmio_remove,
.driver = {
.name = "virtio-mmio",
.of_match_table = virtio_mmio_match,