isa: Make the remove callback for isa drivers return void

The driver core ignores the return value of the remove callback, so
don't give isa drivers the chance to provide a value.

Adapt all isa_drivers with a remove callbacks accordingly; they all
return 0 unconditionally anyhow.

Acked-by: Marc Kleine-Budde <mkl@pengutronix.de> # for drivers/net/can/sja1000/tscan1.c
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Acked-by: Wolfram Sang <wsa@kernel.org> # for drivers/i2c/
Reviewed-by: Takashi Iway <tiwai@suse.de> # for sound/
Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> # for drivers/media/
Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org>
Link: https://lore.kernel.org/r/20210122092449.426097-4-uwe@kleine-koenig.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/drivers/scsi/fdomain_isa.c b/drivers/scsi/fdomain_isa.c
index e0cdcd2..2b4280a 100644
--- a/drivers/scsi/fdomain_isa.c
+++ b/drivers/scsi/fdomain_isa.c
@@ -175,7 +175,7 @@ static int fdomain_isa_param_match(struct device *dev, unsigned int ndev)
 	return 1;
 }
 
-static int fdomain_isa_remove(struct device *dev, unsigned int ndev)
+static void fdomain_isa_remove(struct device *dev, unsigned int ndev)
 {
 	struct Scsi_Host *sh = dev_get_drvdata(dev);
 	int base = sh->io_port;
@@ -183,7 +183,6 @@ static int fdomain_isa_remove(struct device *dev, unsigned int ndev)
 	fdomain_destroy(sh);
 	release_region(base, FDOMAIN_REGION_SIZE);
 	dev_set_drvdata(dev, NULL);
-	return 0;
 }
 
 static struct isa_driver fdomain_isa_driver = {