From: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
To: "Michael S. Tsirkin" <mst@redhat.com>, Jason Wang <jasowang@redhat.com>
Cc: Xuan Zhuo <xuanzhuo@linux.alibaba.com>,
virtualization@lists.linux.dev, kernel@pengutronix.de
Subject: [PATCH] virtio-mmio: Convert to platform remove callback returning void
Date: Fri, 8 Mar 2024 09:51:20 +0100 [thread overview]
Message-ID: <ef71f955531d5e41b20d801e1149bb08d155679a.1709886922.git.u.kleine-koenig@pengutronix.de> (raw)
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>
---
drivers/virtio/virtio_mmio.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c
index 59892a31cf76..173596589c71 100644
--- a/drivers/virtio/virtio_mmio.c
+++ b/drivers/virtio/virtio_mmio.c
@@ -696,12 +696,10 @@ static int virtio_mmio_probe(struct platform_device *pdev)
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,
base-commit: 8ffc8b1bbd505e27e2c8439d326b6059c906c9dd
--
2.43.0
next reply other threads:[~2024-03-08 8:52 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-08 8:51 Uwe Kleine-König [this message]
2024-03-08 17:18 ` [PATCH] virtio-mmio: Convert to platform remove callback returning void Michael S. Tsirkin
2024-03-08 18:46 ` Uwe Kleine-König
2024-04-12 12:29 ` Uwe Kleine-König
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