On Thu, 26 Nov 2020 17:59:50 +0100, Uwe Kleine-König wrote:
The driver core ignores the return value of struct device_driver::remove because there is only little that can be done. For the shutdown callback it's ps3_system_bus_shutdown() which ignores the return value.
To simplify the quest to make struct device_driver::remove return void, let struct ps3_system_bus_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 ensures future users behave accordingly.
Signed-off-by: Uwe Kleine-König u.kleine-koenig@pengutronix.de
For the sound bit: Acked-by: Takashi Iwai tiwai@suse.de
thanks,
Takashi
arch/powerpc/include/asm/ps3.h | 4 ++-- arch/powerpc/platforms/ps3/system-bus.c | 5 ++--- drivers/block/ps3disk.c | 3 +-- drivers/block/ps3vram.c | 3 +-- drivers/char/ps3flash.c | 3 +-- drivers/net/ethernet/toshiba/ps3_gelic_net.c | 3 +-- drivers/ps3/ps3-lpm.c | 3 +-- drivers/ps3/ps3-vuart.c | 10 ++++------ drivers/scsi/ps3rom.c | 3 +-- drivers/usb/host/ehci-ps3.c | 4 +--- drivers/usb/host/ohci-ps3.c | 4 +--- drivers/video/fbdev/ps3fb.c | 4 +--- sound/ppc/snd_ps3.c | 3 +-- 13 files changed, 18 insertions(+), 34 deletions(-)
diff --git a/arch/powerpc/include/asm/ps3.h b/arch/powerpc/include/asm/ps3.h index cb89e4bf55ce..e646c7f218bc 100644 --- a/arch/powerpc/include/asm/ps3.h +++ b/arch/powerpc/include/asm/ps3.h @@ -378,8 +378,8 @@ struct ps3_system_bus_driver { enum ps3_match_sub_id match_sub_id; struct device_driver core; int (*probe)(struct ps3_system_bus_device *);
- int (*remove)(struct ps3_system_bus_device *);
- int (*shutdown)(struct ps3_system_bus_device *);
- void (*remove)(struct ps3_system_bus_device *);
- void (*shutdown)(struct ps3_system_bus_device *);
/* int (*suspend)(struct ps3_system_bus_device *, pm_message_t); */ /* int (*resume)(struct ps3_system_bus_device *); */ }; diff --git a/arch/powerpc/platforms/ps3/system-bus.c b/arch/powerpc/platforms/ps3/system-bus.c index c62aaa29a9d5..b431f41c6cb5 100644 --- a/arch/powerpc/platforms/ps3/system-bus.c +++ b/arch/powerpc/platforms/ps3/system-bus.c @@ -382,7 +382,6 @@ static int ps3_system_bus_probe(struct device *_dev)
static int ps3_system_bus_remove(struct device *_dev) {
- int result = 0; struct ps3_system_bus_device *dev = ps3_dev_to_system_bus_dev(_dev); struct ps3_system_bus_driver *drv;
@@ -393,13 +392,13 @@ static int ps3_system_bus_remove(struct device *_dev) BUG_ON(!drv);
if (drv->remove)
result = drv->remove(dev);
drv->remove(dev);else dev_dbg(&dev->core, "%s:%d %s: no remove method\n", __func__, __LINE__, drv->core.name);
pr_debug(" <- %s:%d: %s\n", __func__, __LINE__, dev_name(&dev->core));
- return result;
- return 0;
}
static void ps3_system_bus_shutdown(struct device *_dev) diff --git a/drivers/block/ps3disk.c b/drivers/block/ps3disk.c index 7b55811c2a81..ba3ece56cbb3 100644 --- a/drivers/block/ps3disk.c +++ b/drivers/block/ps3disk.c @@ -507,7 +507,7 @@ static int ps3disk_probe(struct ps3_system_bus_device *_dev) return error; }
-static int ps3disk_remove(struct ps3_system_bus_device *_dev) +static void ps3disk_remove(struct ps3_system_bus_device *_dev) { struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core); struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd); @@ -526,7 +526,6 @@ static int ps3disk_remove(struct ps3_system_bus_device *_dev) kfree(dev->bounce_buf); kfree(priv); ps3_system_bus_set_drvdata(_dev, NULL);
- return 0;
}
static struct ps3_system_bus_driver ps3disk = { diff --git a/drivers/block/ps3vram.c b/drivers/block/ps3vram.c index 1088798c8dd0..b71d28372ef3 100644 --- a/drivers/block/ps3vram.c +++ b/drivers/block/ps3vram.c @@ -797,7 +797,7 @@ static int ps3vram_probe(struct ps3_system_bus_device *dev) return error; }
-static int ps3vram_remove(struct ps3_system_bus_device *dev) +static void ps3vram_remove(struct ps3_system_bus_device *dev) { struct ps3vram_priv *priv = ps3_system_bus_get_drvdata(dev);
@@ -817,7 +817,6 @@ static int ps3vram_remove(struct ps3_system_bus_device *dev) free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE)); kfree(priv); ps3_system_bus_set_drvdata(dev, NULL);
- return 0;
}
static struct ps3_system_bus_driver ps3vram = { diff --git a/drivers/char/ps3flash.c b/drivers/char/ps3flash.c index 1a07fee33f66..23871cde41fb 100644 --- a/drivers/char/ps3flash.c +++ b/drivers/char/ps3flash.c @@ -403,7 +403,7 @@ static int ps3flash_probe(struct ps3_system_bus_device *_dev) return error; }
-static int ps3flash_remove(struct ps3_system_bus_device *_dev) +static void ps3flash_remove(struct ps3_system_bus_device *_dev) { struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
@@ -413,7 +413,6 @@ static int ps3flash_remove(struct ps3_system_bus_device *_dev) kfree(ps3_system_bus_get_drvdata(&dev->sbd)); ps3_system_bus_set_drvdata(&dev->sbd, NULL); ps3flash_dev = NULL;
- return 0;
}
diff --git a/drivers/net/ethernet/toshiba/ps3_gelic_net.c b/drivers/net/ethernet/toshiba/ps3_gelic_net.c index d9a5722f561b..3d1fc8d2ca66 100644 --- a/drivers/net/ethernet/toshiba/ps3_gelic_net.c +++ b/drivers/net/ethernet/toshiba/ps3_gelic_net.c @@ -1791,7 +1791,7 @@ static int ps3_gelic_driver_probe(struct ps3_system_bus_device *dev)
- ps3_gelic_driver_remove - remove a device from the control of this driver
*/
-static int ps3_gelic_driver_remove(struct ps3_system_bus_device *dev) +static void ps3_gelic_driver_remove(struct ps3_system_bus_device *dev) { struct gelic_card *card = ps3_system_bus_get_drvdata(dev); struct net_device *netdev0; @@ -1840,7 +1840,6 @@ static int ps3_gelic_driver_remove(struct ps3_system_bus_device *dev) ps3_close_hv_device(dev);
pr_debug("%s: done\n", __func__);
- return 0;
}
static struct ps3_system_bus_driver ps3_gelic_driver = { diff --git a/drivers/ps3/ps3-lpm.c b/drivers/ps3/ps3-lpm.c index e54aa2d82f50..65512b6cc6fd 100644 --- a/drivers/ps3/ps3-lpm.c +++ b/drivers/ps3/ps3-lpm.c @@ -1196,7 +1196,7 @@ static int ps3_lpm_probe(struct ps3_system_bus_device *dev) return 0; }
-static int ps3_lpm_remove(struct ps3_system_bus_device *dev) +static void ps3_lpm_remove(struct ps3_system_bus_device *dev) { dev_dbg(&dev->core, " -> %s:%u:\n", __func__, __LINE__);
@@ -1206,7 +1206,6 @@ static int ps3_lpm_remove(struct ps3_system_bus_device *dev) lpm_priv = NULL;
dev_info(&dev->core, " <- %s:%u:\n", __func__, __LINE__);
- return 0;
}
static struct ps3_system_bus_driver ps3_lpm_driver = { diff --git a/drivers/ps3/ps3-vuart.c b/drivers/ps3/ps3-vuart.c index 4ed131eaff51..e34ae6a442c7 100644 --- a/drivers/ps3/ps3-vuart.c +++ b/drivers/ps3/ps3-vuart.c @@ -1102,7 +1102,7 @@ static int ps3_vuart_cleanup(struct ps3_system_bus_device *dev)
- device can no longer be used.
*/
-static int ps3_vuart_remove(struct ps3_system_bus_device *dev) +static void ps3_vuart_remove(struct ps3_system_bus_device *dev) { struct ps3_vuart_port_priv *priv = to_port_priv(dev); struct ps3_vuart_port_driver *drv; @@ -1118,7 +1118,7 @@ static int ps3_vuart_remove(struct ps3_system_bus_device *dev) dev_dbg(&dev->core, "%s:%d: no driver bound\n", __func__, __LINE__); mutex_unlock(&vuart_bus_priv.probe_mutex);
return 0;
return;}
drv = ps3_system_bus_dev_to_vuart_drv(dev);
@@ -1141,7 +1141,6 @@ static int ps3_vuart_remove(struct ps3_system_bus_device *dev)
dev_dbg(&dev->core, " <- %s:%d\n", __func__, __LINE__); mutex_unlock(&vuart_bus_priv.probe_mutex);
- return 0;
}
/** @@ -1154,7 +1153,7 @@ static int ps3_vuart_remove(struct ps3_system_bus_device *dev)
- sequence.
*/
-static int ps3_vuart_shutdown(struct ps3_system_bus_device *dev) +static void ps3_vuart_shutdown(struct ps3_system_bus_device *dev) { struct ps3_vuart_port_driver *drv;
@@ -1169,7 +1168,7 @@ static int ps3_vuart_shutdown(struct ps3_system_bus_device *dev) dev_dbg(&dev->core, "%s:%d: no driver bound\n", __func__, __LINE__); mutex_unlock(&vuart_bus_priv.probe_mutex);
return 0;
return;}
drv = ps3_system_bus_dev_to_vuart_drv(dev);
@@ -1193,7 +1192,6 @@ static int ps3_vuart_shutdown(struct ps3_system_bus_device *dev) dev_dbg(&dev->core, " <- %s:%d\n", __func__, __LINE__);
mutex_unlock(&vuart_bus_priv.probe_mutex);
- return 0;
}
static int __init ps3_vuart_bus_init(void) diff --git a/drivers/scsi/ps3rom.c b/drivers/scsi/ps3rom.c index f75c0b5cd587..ccb5771f1cb7 100644 --- a/drivers/scsi/ps3rom.c +++ b/drivers/scsi/ps3rom.c @@ -402,7 +402,7 @@ static int ps3rom_probe(struct ps3_system_bus_device *_dev) return error; }
-static int ps3rom_remove(struct ps3_system_bus_device *_dev) +static void ps3rom_remove(struct ps3_system_bus_device *_dev) { struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core); struct Scsi_Host *host = ps3_system_bus_get_drvdata(&dev->sbd); @@ -412,7 +412,6 @@ static int ps3rom_remove(struct ps3_system_bus_device *_dev) scsi_host_put(host); ps3_system_bus_set_drvdata(&dev->sbd, NULL); kfree(dev->bounce_buf);
- return 0;
}
static struct ps3_system_bus_driver ps3rom = { diff --git a/drivers/usb/host/ehci-ps3.c b/drivers/usb/host/ehci-ps3.c index fb52133c3557..98568b046a1a 100644 --- a/drivers/usb/host/ehci-ps3.c +++ b/drivers/usb/host/ehci-ps3.c @@ -200,7 +200,7 @@ static int ps3_ehci_probe(struct ps3_system_bus_device *dev) return result; }
-static int ps3_ehci_remove(struct ps3_system_bus_device *dev) +static void ps3_ehci_remove(struct ps3_system_bus_device *dev) { unsigned int tmp; struct usb_hcd *hcd = ps3_system_bus_get_drvdata(dev); @@ -227,8 +227,6 @@ static int ps3_ehci_remove(struct ps3_system_bus_device *dev)
ps3_dma_region_free(dev->d_region); ps3_close_hv_device(dev);
- return 0;
}
static int __init ps3_ehci_driver_register(struct ps3_system_bus_driver *drv) diff --git a/drivers/usb/host/ohci-ps3.c b/drivers/usb/host/ohci-ps3.c index f77cd6af0ccf..4f5af929c3e4 100644 --- a/drivers/usb/host/ohci-ps3.c +++ b/drivers/usb/host/ohci-ps3.c @@ -184,7 +184,7 @@ static int ps3_ohci_probe(struct ps3_system_bus_device *dev) return result; }
-static int ps3_ohci_remove(struct ps3_system_bus_device *dev) +static void ps3_ohci_remove(struct ps3_system_bus_device *dev) { unsigned int tmp; struct usb_hcd *hcd = ps3_system_bus_get_drvdata(dev); @@ -212,8 +212,6 @@ static int ps3_ohci_remove(struct ps3_system_bus_device *dev)
ps3_dma_region_free(dev->d_region); ps3_close_hv_device(dev);
- return 0;
}
static int __init ps3_ohci_driver_register(struct ps3_system_bus_driver *drv) diff --git a/drivers/video/fbdev/ps3fb.c b/drivers/video/fbdev/ps3fb.c index 203c254f8f6c..2fe08b67eda7 100644 --- a/drivers/video/fbdev/ps3fb.c +++ b/drivers/video/fbdev/ps3fb.c @@ -1208,7 +1208,7 @@ static int ps3fb_probe(struct ps3_system_bus_device *dev) return retval; }
-static int ps3fb_shutdown(struct ps3_system_bus_device *dev) +static void ps3fb_shutdown(struct ps3_system_bus_device *dev) { struct fb_info *info = ps3_system_bus_get_drvdata(dev); u64 xdr_lpar = ps3_mm_phys_to_lpar(__pa(ps3fb_videomemory.address)); @@ -1241,8 +1241,6 @@ static int ps3fb_shutdown(struct ps3_system_bus_device *dev) lv1_gpu_memory_free(ps3fb.memory_handle); ps3_close_hv_device(dev); dev_dbg(&dev->core, " <- %s:%d\n", __func__, __LINE__);
- return 0;
}
static struct ps3_system_bus_driver ps3fb_driver = { diff --git a/sound/ppc/snd_ps3.c b/sound/ppc/snd_ps3.c index 6ab796a5d936..8e44fa5d4dc7 100644 --- a/sound/ppc/snd_ps3.c +++ b/sound/ppc/snd_ps3.c @@ -1049,7 +1049,7 @@ static int snd_ps3_driver_probe(struct ps3_system_bus_device *dev) }; /* snd_ps3_probe */
/* called when module removal */ -static int snd_ps3_driver_remove(struct ps3_system_bus_device *dev) +static void snd_ps3_driver_remove(struct ps3_system_bus_device *dev) { int ret; pr_info("%s:start id=%d\n", __func__, dev->match_id); @@ -1075,7 +1075,6 @@ static int snd_ps3_driver_remove(struct ps3_system_bus_device *dev) lv1_gpu_device_unmap(2); ps3_close_hv_device(dev); pr_info("%s:end id=%d\n", __func__, dev->match_id);
- return 0;
} /* snd_ps3_remove */
static struct ps3_system_bus_driver snd_ps3_bus_driver_info = {
2.29.2