| Message ID | 20210505201449.195627-1-u.kleine-koenig@pengutronix.de |
|---|---|
| State | New |
| Headers | show |
| Series | sparc/vio: make remove callback return void | expand |
From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Date: Wed, 5 May 2021 22:14:49 +0200 > The driver core ignores the return value of struct bus_type::remove() > because there is only little that can be done. To simplify the quest to > make this function return void, let struct vio_driver::remove() return > void, too. All users already unconditionally return 0, this commit makes > it obvious that returning an error code is a bad idea and should prevent > that future driver authors consider returning an error code. > > Note there are two nominally different implementations for a vio bus: > one in arch/sparc/kernel/vio.c and the other in > arch/powerpc/platforms/pseries/vio.c. This patch only addresses the > former. > > Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: David S. Miller <davem@davemloft.net>
Hi Dave, On Wed, May 05, 2021 at 01:27:39PM -0700, David Miller wrote: > From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> > Date: Wed, 5 May 2021 22:14:49 +0200 > > > The driver core ignores the return value of struct bus_type::remove() > > because there is only little that can be done. To simplify the quest to > > make this function return void, let struct vio_driver::remove() return > > void, too. All users already unconditionally return 0, this commit makes > > it obvious that returning an error code is a bad idea and should prevent > > that future driver authors consider returning an error code. > > > > Note there are two nominally different implementations for a vio bus: > > one in arch/sparc/kernel/vio.c and the other in > > arch/powerpc/platforms/pseries/vio.c. This patch only addresses the > > former. > > > > Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> > > Acked-by: David S. Miller <davem@davemloft.net> Thanks for your Ack. My expectation was that this patch will go via a sparc tree. Does your Ack mean that you think it should take a different path? Best regards Uwe -- Pengutronix e.K. | Uwe Kleine-König | Industrial Linux Solutions | https://www.pengutronix.de/ |
On Thu, May 06, 2021 at 08:11:21AM +0200, Uwe Kleine-König wrote: > Hi Dave, > > On Wed, May 05, 2021 at 01:27:39PM -0700, David Miller wrote: > > From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> > > Date: Wed, 5 May 2021 22:14:49 +0200 > > > > > The driver core ignores the return value of struct bus_type::remove() > > > because there is only little that can be done. To simplify the quest to > > > make this function return void, let struct vio_driver::remove() return > > > void, too. All users already unconditionally return 0, this commit makes > > > it obvious that returning an error code is a bad idea and should prevent > > > that future driver authors consider returning an error code. > > > > > > Note there are two nominally different implementations for a vio bus: > > > one in arch/sparc/kernel/vio.c and the other in > > > arch/powerpc/platforms/pseries/vio.c. This patch only addresses the > > > former. > > > > > > Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> > > > > Acked-by: David S. Miller <davem@davemloft.net> > > Thanks for your Ack. My expectation was that this patch will go via a > sparc tree. Does your Ack mean that you think it should take a different > path? I'll pick it up, thanks. greg k-h
diff --git a/arch/sparc/include/asm/vio.h b/arch/sparc/include/asm/vio.h index 059f0eb678e0..8a1a83bbb6d5 100644 --- a/arch/sparc/include/asm/vio.h +++ b/arch/sparc/include/asm/vio.h @@ -362,7 +362,7 @@ struct vio_driver { struct list_head node; const struct vio_device_id *id_table; int (*probe)(struct vio_dev *dev, const struct vio_device_id *id); - int (*remove)(struct vio_dev *dev); + void (*remove)(struct vio_dev *dev); void (*shutdown)(struct vio_dev *dev); unsigned long driver_data; struct device_driver driver; diff --git a/arch/sparc/kernel/ds.c b/arch/sparc/kernel/ds.c index 522e5b51050c..4a5bdb0df779 100644 --- a/arch/sparc/kernel/ds.c +++ b/arch/sparc/kernel/ds.c @@ -1236,11 +1236,6 @@ static int ds_probe(struct vio_dev *vdev, const struct vio_device_id *id) return err; } -static int ds_remove(struct vio_dev *vdev) -{ - return 0; -} - static const struct vio_device_id ds_match[] = { { .type = "domain-services-port", @@ -1251,7 +1246,6 @@ static const struct vio_device_id ds_match[] = { static struct vio_driver ds_driver = { .id_table = ds_match, .probe = ds_probe, - .remove = ds_remove, .name = "ds", }; diff --git a/arch/sparc/kernel/vio.c b/arch/sparc/kernel/vio.c index 4f57056ed463..348a88691219 100644 --- a/arch/sparc/kernel/vio.c +++ b/arch/sparc/kernel/vio.c @@ -105,10 +105,10 @@ static int vio_device_remove(struct device *dev) * routines to do so at the moment. TBD */ - return drv->remove(vdev); + drv->remove(vdev); } - return 1; + return 0; } static ssize_t devspec_show(struct device *dev, diff --git a/drivers/block/sunvdc.c b/drivers/block/sunvdc.c index 39aeebc6837d..1547d4345ad8 100644 --- a/drivers/block/sunvdc.c +++ b/drivers/block/sunvdc.c @@ -1071,7 +1071,7 @@ static int vdc_port_probe(struct vio_dev *vdev, const struct vio_device_id *id) return err; } -static int vdc_port_remove(struct vio_dev *vdev) +static void vdc_port_remove(struct vio_dev *vdev) { struct vdc_port *port = dev_get_drvdata(&vdev->dev); @@ -1094,7 +1094,6 @@ static int vdc_port_remove(struct vio_dev *vdev) kfree(port); } - return 0; } static void vdc_requeue_inflight(struct vdc_port *port) diff --git a/drivers/net/ethernet/sun/ldmvsw.c b/drivers/net/ethernet/sun/ldmvsw.c index 01ea0d6f8819..50bd4e3b0af9 100644 --- a/drivers/net/ethernet/sun/ldmvsw.c +++ b/drivers/net/ethernet/sun/ldmvsw.c @@ -404,7 +404,7 @@ static int vsw_port_probe(struct vio_dev *vdev, const struct vio_device_id *id) return err; } -static int vsw_port_remove(struct vio_dev *vdev) +static void vsw_port_remove(struct vio_dev *vdev) { struct vnet_port *port = dev_get_drvdata(&vdev->dev); unsigned long flags; @@ -430,8 +430,6 @@ static int vsw_port_remove(struct vio_dev *vdev) free_netdev(port->dev); } - - return 0; } static void vsw_cleanup(void) diff --git a/drivers/net/ethernet/sun/sunvnet.c b/drivers/net/ethernet/sun/sunvnet.c index 96b883f965f6..58ee89223951 100644 --- a/drivers/net/ethernet/sun/sunvnet.c +++ b/drivers/net/ethernet/sun/sunvnet.c @@ -510,7 +510,7 @@ static int vnet_port_probe(struct vio_dev *vdev, const struct vio_device_id *id) return err; } -static int vnet_port_remove(struct vio_dev *vdev) +static void vnet_port_remove(struct vio_dev *vdev) { struct vnet_port *port = dev_get_drvdata(&vdev->dev); @@ -533,7 +533,6 @@ static int vnet_port_remove(struct vio_dev *vdev) kfree(port); } - return 0; } static const struct vio_device_id vnet_port_match[] = { diff --git a/drivers/tty/vcc.c b/drivers/tty/vcc.c index 0a3a71e14df4..0c9b291ef307 100644 --- a/drivers/tty/vcc.c +++ b/drivers/tty/vcc.c @@ -668,7 +668,7 @@ static int vcc_probe(struct vio_dev *vdev, const struct vio_device_id *id) * * Return: status of removal */ -static int vcc_remove(struct vio_dev *vdev) +static void vcc_remove(struct vio_dev *vdev) { struct vcc_port *port = dev_get_drvdata(&vdev->dev); @@ -703,8 +703,6 @@ static int vcc_remove(struct vio_dev *vdev) kfree(port->domain); kfree(port); } - - return 0; } static const struct vio_device_id vcc_match[] = {
The driver core ignores the return value of struct bus_type::remove() because there is only little that can be done. To simplify the quest to make this function return void, let struct vio_driver::remove() return void, too. All users already unconditionally return 0, this commit makes it obvious that returning an error code is a bad idea and should prevent that future driver authors consider returning an error code. Note there are two nominally different implementations for a vio bus: one in arch/sparc/kernel/vio.c and the other in arch/powerpc/platforms/pseries/vio.c. This patch only addresses the former. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> --- arch/sparc/include/asm/vio.h | 2 +- arch/sparc/kernel/ds.c | 6 ------ arch/sparc/kernel/vio.c | 4 ++-- drivers/block/sunvdc.c | 3 +-- drivers/net/ethernet/sun/ldmvsw.c | 4 +--- drivers/net/ethernet/sun/sunvnet.c | 3 +-- drivers/tty/vcc.c | 4 +--- 7 files changed, 7 insertions(+), 19 deletions(-)