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powerpc/ps3: make system bus's remove and shutdown callbacks return void 

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>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201126165950.2554997-2-u.kleine-koenig@pengutronix.de
This commit is contained in:
Uwe Kleine-König 2020-11-26 17:59:50 +01:00 committed by Michael Ellerman
parent 7ff94669e7
commit 6d247e4d26
13 changed files with 18 additions and 34 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/powerpc/include/asm/ps3.h
View File

@ -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 *); */
};

5
arch/powerpc/platforms/ps3/system-bus.c
View File

@ -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)

3
drivers/block/ps3disk.c
View File

@ -507,7 +507,7 @@ fail:
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 = {

3
drivers/block/ps3vram.c
View File

@ -797,7 +797,7 @@ fail:
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 = {

3
drivers/char/ps3flash.c
View File

@ -403,7 +403,7 @@ fail:
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;
}

3
drivers/net/ethernet/toshiba/ps3_gelic_net.c
View File

@ -1791,7 +1791,7 @@ fail_open:
* 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 = {

3
drivers/ps3/ps3-lpm.c
View File

@ -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 = {

10
drivers/ps3/ps3-vuart.c
View File

@ -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)

3
drivers/scsi/ps3rom.c
View File

@ -402,7 +402,7 @@ fail_free_bounce:
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 = {

4
drivers/usb/host/ehci-ps3.c
View File

@ -200,7 +200,7 @@ fail_start:
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)

4
drivers/usb/host/ohci-ps3.c
View File

@ -184,7 +184,7 @@ fail_start:
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)

4
drivers/video/fbdev/ps3fb.c
View File

@ -1208,7 +1208,7 @@ err:
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 = {

3
sound/ppc/snd_ps3.c
View File

@ -1049,7 +1049,7 @@ clean_open:
}; /* 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 = {