Merge branch 'devel-stable' of git://git.armlinux.org.uk/~rmk/linux-arm into char-misc-next

This merges from linux-arm at 860660fd ("ARM: 9055/1: mailbox:
arm_mhuv2: make remove callback return void") into char-misc-next to get
the amba fixes from Uwe.

Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Russell King <linux@armlinux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/amba/bus.c

@@ -56,31 +56,28 @@ amba_lookup(const struct amba_id *table, struct amba_device *dev)
 	return NULL;
 }
 
-static int amba_match(struct device *dev, struct device_driver *drv)
+static int amba_get_enable_pclk(struct amba_device *pcdev)
 {
-	struct amba_device *pcdev = to_amba_device(dev);
-	struct amba_driver *pcdrv = to_amba_driver(drv);
+	int ret;
 
-	/* When driver_override is set, only bind to the matching driver */
-	if (pcdev->driver_override)
-		return !strcmp(pcdev->driver_override, drv->name);
+	pcdev->pclk = clk_get(&pcdev->dev, "apb_pclk");
+	if (IS_ERR(pcdev->pclk))
+		return PTR_ERR(pcdev->pclk);
 
-	return amba_lookup(pcdrv->id_table, pcdev) != NULL;
+	ret = clk_prepare_enable(pcdev->pclk);
+	if (ret)
+		clk_put(pcdev->pclk);
+
+	return ret;
 }
 
-static int amba_uevent(struct device *dev, struct kobj_uevent_env *env)
+static void amba_put_disable_pclk(struct amba_device *pcdev)
 {
-	struct amba_device *pcdev = to_amba_device(dev);
-	int retval = 0;
-
-	retval = add_uevent_var(env, "AMBA_ID=%08x", pcdev->periphid);
-	if (retval)
-		return retval;
-
-	retval = add_uevent_var(env, "MODALIAS=amba:d%08X", pcdev->periphid);
-	return retval;
+	clk_disable_unprepare(pcdev->pclk);
+	clk_put(pcdev->pclk);
 }
 
+
 static ssize_t driver_override_show(struct device *_dev,
 				    struct device_attribute *attr, char *buf)
 {
@@ -152,102 +149,29 @@ static struct attribute *amba_dev_attrs[] = {
 };
 ATTRIBUTE_GROUPS(amba_dev);
 
-#ifdef CONFIG_PM
-/*
- * Hooks to provide runtime PM of the pclk (bus clock).  It is safe to
- * enable/disable the bus clock at runtime PM suspend/resume as this
- * does not result in loss of context.
- */
-static int amba_pm_runtime_suspend(struct device *dev)
+static int amba_match(struct device *dev, struct device_driver *drv)
 {
 	struct amba_device *pcdev = to_amba_device(dev);
-	int ret = pm_generic_runtime_suspend(dev);
+	struct amba_driver *pcdrv = to_amba_driver(drv);
 
-	if (ret == 0 && dev->driver) {
-		if (pm_runtime_is_irq_safe(dev))
-			clk_disable(pcdev->pclk);
-		else
-			clk_disable_unprepare(pcdev->pclk);
-	}
+	/* When driver_override is set, only bind to the matching driver */
+	if (pcdev->driver_override)
+		return !strcmp(pcdev->driver_override, drv->name);
 
-	return ret;
+	return amba_lookup(pcdrv->id_table, pcdev) != NULL;
 }
 
-static int amba_pm_runtime_resume(struct device *dev)
+static int amba_uevent(struct device *dev, struct kobj_uevent_env *env)
 {
 	struct amba_device *pcdev = to_amba_device(dev);
-	int ret;
-
-	if (dev->driver) {
-		if (pm_runtime_is_irq_safe(dev))
-			ret = clk_enable(pcdev->pclk);
-		else
-			ret = clk_prepare_enable(pcdev->pclk);
-		/* Failure is probably fatal to the system, but... */
-		if (ret)
-			return ret;
-	}
-
-	return pm_generic_runtime_resume(dev);
-}
-#endif /* CONFIG_PM */
-
-static const struct dev_pm_ops amba_pm = {
-	.suspend	= pm_generic_suspend,
-	.resume		= pm_generic_resume,
-	.freeze		= pm_generic_freeze,
-	.thaw		= pm_generic_thaw,
-	.poweroff	= pm_generic_poweroff,
-	.restore	= pm_generic_restore,
-	SET_RUNTIME_PM_OPS(
-		amba_pm_runtime_suspend,
-		amba_pm_runtime_resume,
-		NULL
-	)
-};
-
-/*
- * Primecells are part of the Advanced Microcontroller Bus Architecture,
- * so we call the bus "amba".
- * DMA configuration for platform and AMBA bus is same. So here we reuse
- * platform's DMA config routine.
- */
-struct bus_type amba_bustype = {
-	.name		= "amba",
-	.dev_groups	= amba_dev_groups,
-	.match		= amba_match,
-	.uevent		= amba_uevent,
-	.dma_configure	= platform_dma_configure,
-	.pm		= &amba_pm,
-};
-EXPORT_SYMBOL_GPL(amba_bustype);
-
-static int __init amba_init(void)
-{
-	return bus_register(&amba_bustype);
-}
-
-postcore_initcall(amba_init);
-
-static int amba_get_enable_pclk(struct amba_device *pcdev)
-{
-	int ret;
-
-	pcdev->pclk = clk_get(&pcdev->dev, "apb_pclk");
-	if (IS_ERR(pcdev->pclk))
-		return PTR_ERR(pcdev->pclk);
-
-	ret = clk_prepare_enable(pcdev->pclk);
-	if (ret)
-		clk_put(pcdev->pclk);
+	int retval = 0;
 
-	return ret;
-}
+	retval = add_uevent_var(env, "AMBA_ID=%08x", pcdev->periphid);
+	if (retval)
+		return retval;
 
-static void amba_put_disable_pclk(struct amba_device *pcdev)
-{
-	clk_disable_unprepare(pcdev->pclk);
-	clk_put(pcdev->pclk);
+	retval = add_uevent_var(env, "MODALIAS=amba:d%08X", pcdev->periphid);
+	return retval;
 }
 
 /*
@@ -299,10 +223,10 @@ static int amba_remove(struct device *dev)
 {
 	struct amba_device *pcdev = to_amba_device(dev);
 	struct amba_driver *drv = to_amba_driver(dev->driver);
-	int ret;
 
 	pm_runtime_get_sync(dev);
-	ret = drv->remove(pcdev);
+	if (drv->remove)
+		drv->remove(pcdev);
 	pm_runtime_put_noidle(dev);
 
 	/* Undo the runtime PM settings in amba_probe() */
@@ -313,15 +237,101 @@ static int amba_remove(struct device *dev)
 	amba_put_disable_pclk(pcdev);
 	dev_pm_domain_detach(dev, true);
 
-	return ret;
+	return 0;
 }
 
 static void amba_shutdown(struct device *dev)
 {
-	struct amba_driver *drv = to_amba_driver(dev->driver);
+	struct amba_driver *drv;
+
+	if (!dev->driver)
+		return;
+
+	drv = to_amba_driver(dev->driver);
+	if (drv->shutdown)
 		drv->shutdown(to_amba_device(dev));
 }
 
+#ifdef CONFIG_PM
+/*
+ * Hooks to provide runtime PM of the pclk (bus clock).  It is safe to
+ * enable/disable the bus clock at runtime PM suspend/resume as this
+ * does not result in loss of context.
+ */
+static int amba_pm_runtime_suspend(struct device *dev)
+{
+	struct amba_device *pcdev = to_amba_device(dev);
+	int ret = pm_generic_runtime_suspend(dev);
+
+	if (ret == 0 && dev->driver) {
+		if (pm_runtime_is_irq_safe(dev))
+			clk_disable(pcdev->pclk);
+		else
+			clk_disable_unprepare(pcdev->pclk);
+	}
+
+	return ret;
+}
+
+static int amba_pm_runtime_resume(struct device *dev)
+{
+	struct amba_device *pcdev = to_amba_device(dev);
+	int ret;
+
+	if (dev->driver) {
+		if (pm_runtime_is_irq_safe(dev))
+			ret = clk_enable(pcdev->pclk);
+		else
+			ret = clk_prepare_enable(pcdev->pclk);
+		/* Failure is probably fatal to the system, but... */
+		if (ret)
+			return ret;
+	}
+
+	return pm_generic_runtime_resume(dev);
+}
+#endif /* CONFIG_PM */
+
+static const struct dev_pm_ops amba_pm = {
+	.suspend	= pm_generic_suspend,
+	.resume		= pm_generic_resume,
+	.freeze		= pm_generic_freeze,
+	.thaw		= pm_generic_thaw,
+	.poweroff	= pm_generic_poweroff,
+	.restore	= pm_generic_restore,
+	SET_RUNTIME_PM_OPS(
+		amba_pm_runtime_suspend,
+		amba_pm_runtime_resume,
+		NULL
+	)
+};
+
+/*
+ * Primecells are part of the Advanced Microcontroller Bus Architecture,
+ * so we call the bus "amba".
+ * DMA configuration for platform and AMBA bus is same. So here we reuse
+ * platform's DMA config routine.
+ */
+struct bus_type amba_bustype = {
+	.name		= "amba",
+	.dev_groups	= amba_dev_groups,
+	.match		= amba_match,
+	.uevent		= amba_uevent,
+	.probe		= amba_probe,
+	.remove		= amba_remove,
+	.shutdown	= amba_shutdown,
+	.dma_configure	= platform_dma_configure,
+	.pm		= &amba_pm,
+};
+EXPORT_SYMBOL_GPL(amba_bustype);
+
+static int __init amba_init(void)
+{
+	return bus_register(&amba_bustype);
+}
+
+postcore_initcall(amba_init);
+
 /**
  *	amba_driver_register - register an AMBA device driver
  *	@drv: amba device driver structure
@@ -332,12 +342,10 @@ static void amba_shutdown(struct device *dev)
  */
 int amba_driver_register(struct amba_driver *drv)
 {
-	drv->drv.bus = &amba_bustype;
+	if (!drv->probe)
+		return -EINVAL;
 
-#define SETFN(fn)	if (drv->fn) drv->drv.fn = amba_##fn
-	SETFN(probe);
-	SETFN(remove);
-	SETFN(shutdown);
+	drv->drv.bus = &amba_bustype;
 
 	return driver_register(&drv->drv);
 }

drivers/char/hw_random/nomadik-rng.c

@@ -69,11 +69,10 @@ static int nmk_rng_probe(struct amba_device *dev, const struct amba_id *id)
 	return ret;
 }
 
-static int nmk_rng_remove(struct amba_device *dev)
+static void nmk_rng_remove(struct amba_device *dev)
 {
 	amba_release_regions(dev);
 	clk_disable(rng_clk);
-	return 0;
 }
 
 static const struct amba_id nmk_rng_ids[] = {

drivers/dma/pl330.c

@@ -3195,7 +3195,7 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
 	return ret;
 }
 
-static int pl330_remove(struct amba_device *adev)
+static void pl330_remove(struct amba_device *adev)
 {
 	struct pl330_dmac *pl330 = amba_get_drvdata(adev);
 	struct dma_pl330_chan *pch, *_p;
@@ -3235,7 +3235,6 @@ static int pl330_remove(struct amba_device *adev)
 
 	if (pl330->rstc)
 		reset_control_assert(pl330->rstc);
-	return 0;
 }
 
 static const struct amba_id pl330_ids[] = {

drivers/gpu/drm/pl111/pl111_drv.c

@@ -320,7 +320,7 @@ static int pl111_amba_probe(struct amba_device *amba_dev,
 	return ret;
 }
 
-static int pl111_amba_remove(struct amba_device *amba_dev)
+static void pl111_amba_remove(struct amba_device *amba_dev)
 {
 	struct device *dev = &amba_dev->dev;
 	struct drm_device *drm = amba_get_drvdata(amba_dev);
@@ -331,8 +331,6 @@ static int pl111_amba_remove(struct amba_device *amba_dev)
 		drm_panel_bridge_remove(priv->bridge);
 	drm_dev_put(drm);
 	of_reserved_mem_device_release(dev);
-
-	return 0;
 }
 
 /*

drivers/hwtracing/coresight/coresight-catu.c

@@ -571,12 +571,11 @@ static int catu_probe(struct amba_device *adev, const struct amba_id *id)
 	return ret;
 }
 
-static int catu_remove(struct amba_device *adev)
+static void catu_remove(struct amba_device *adev)
 {
 	struct catu_drvdata *drvdata = dev_get_drvdata(&adev->dev);
 
 	coresight_unregister(drvdata->csdev);
-	return 0;
 }
 
 static struct amba_id catu_ids[] = {

drivers/hwtracing/coresight/coresight-cpu-debug.c

@@ -627,7 +627,7 @@ static int debug_probe(struct amba_device *adev, const struct amba_id *id)
 	return ret;
 }
 
-static int debug_remove(struct amba_device *adev)
+static void debug_remove(struct amba_device *adev)
 {
 	struct device *dev = &adev->dev;
 	struct debug_drvdata *drvdata = amba_get_drvdata(adev);
@@ -642,8 +642,6 @@ static int debug_remove(struct amba_device *adev)
 
 	if (!--debug_count)
 		debug_func_exit();
-
-	return 0;
 }
 
 static const struct amba_cs_uci_id uci_id_debug[] = {

drivers/hwtracing/coresight/coresight-cti-core.c

@@ -839,7 +839,7 @@ static void cti_device_release(struct device *dev)
 	if (drvdata->csdev_release)
 		drvdata->csdev_release(dev);
 }
-static int cti_remove(struct amba_device *adev)
+static void cti_remove(struct amba_device *adev)
 {
 	struct cti_drvdata *drvdata = dev_get_drvdata(&adev->dev);
 
@@ -848,8 +848,6 @@ static int cti_remove(struct amba_device *adev)
 	mutex_unlock(&ect_mutex);
 
 	coresight_unregister(drvdata->csdev);
-
-	return 0;
 }
 
 static int cti_probe(struct amba_device *adev, const struct amba_id *id)

drivers/hwtracing/coresight/coresight-etb10.c

@@ -805,7 +805,7 @@ static int etb_probe(struct amba_device *adev, const struct amba_id *id)
 	return ret;
 }
 
-static int etb_remove(struct amba_device *adev)
+static void etb_remove(struct amba_device *adev)
 {
 	struct etb_drvdata *drvdata = dev_get_drvdata(&adev->dev);
 
@@ -816,8 +816,6 @@ static int etb_remove(struct amba_device *adev)
 	 */
 	misc_deregister(&drvdata->miscdev);
 	coresight_unregister(drvdata->csdev);
-
-	return 0;
 }
 
 #ifdef CONFIG_PM

drivers/hwtracing/coresight/coresight-etm3x-core.c

@@ -912,7 +912,7 @@ static void clear_etmdrvdata(void *info)
 	etmdrvdata[cpu] = NULL;
 }
 
-static int etm_remove(struct amba_device *adev)
+static void etm_remove(struct amba_device *adev)
 {
 	struct etm_drvdata *drvdata = dev_get_drvdata(&adev->dev);
 
@@ -935,8 +935,6 @@ static int etm_remove(struct amba_device *adev)
 	cpus_read_unlock();
 
 	coresight_unregister(drvdata->csdev);
-
-	return 0;
 }
 
 #ifdef CONFIG_PM

drivers/hwtracing/coresight/coresight-etm4x-core.c

@@ -1906,8 +1906,6 @@ static int __exit etm4_remove_dev(struct etmv4_drvdata *drvdata)
 	cpus_read_unlock();
 
 	coresight_unregister(drvdata->csdev);
-
-	return 0;
 }
 
 static int __exit etm4_remove_amba(struct amba_device *adev)

drivers/hwtracing/coresight/coresight-funnel.c

@@ -373,9 +373,9 @@ static int dynamic_funnel_probe(struct amba_device *adev,
 	return funnel_probe(&adev->dev, &adev->res);
 }
 
-static int dynamic_funnel_remove(struct amba_device *adev)
+static void dynamic_funnel_remove(struct amba_device *adev)
 {
-	return funnel_remove(&adev->dev);
+	funnel_remove(&adev->dev);
 }
 
 static const struct amba_id dynamic_funnel_ids[] = {

drivers/hwtracing/coresight/coresight-replicator.c

@@ -393,9 +393,9 @@ static int dynamic_replicator_probe(struct amba_device *adev,
 	return replicator_probe(&adev->dev, &adev->res);
 }
 
-static int dynamic_replicator_remove(struct amba_device *adev)
+static void dynamic_replicator_remove(struct amba_device *adev)
 {
-	return replicator_remove(&adev->dev);
+	replicator_remove(&adev->dev);
 }
 
 static const struct amba_id dynamic_replicator_ids[] = {

drivers/hwtracing/coresight/coresight-stm.c

@@ -953,15 +953,13 @@ static int stm_probe(struct amba_device *adev, const struct amba_id *id)
 	return ret;
 }
 
-static int stm_remove(struct amba_device *adev)
+static void stm_remove(struct amba_device *adev)
 {
 	struct stm_drvdata *drvdata = dev_get_drvdata(&adev->dev);
 
 	coresight_unregister(drvdata->csdev);
 
 	stm_unregister_device(&drvdata->stm);
-
-	return 0;
 }
 
 #ifdef CONFIG_PM

drivers/hwtracing/coresight/coresight-tmc-core.c

@@ -563,7 +563,7 @@ static void tmc_shutdown(struct amba_device *adev)
 	spin_unlock_irqrestore(&drvdata->spinlock, flags);
 }
 
-static int tmc_remove(struct amba_device *adev)
+static void tmc_remove(struct amba_device *adev)
 {
 	struct tmc_drvdata *drvdata = dev_get_drvdata(&adev->dev);
 
@@ -574,8 +574,6 @@ static int tmc_remove(struct amba_device *adev)
 	 */
 	misc_deregister(&drvdata->miscdev);
 	coresight_unregister(drvdata->csdev);
-
-	return 0;
 }
 
 static const struct amba_id tmc_ids[] = {

drivers/hwtracing/coresight/coresight-tpiu.c

@@ -170,13 +170,11 @@ static int tpiu_probe(struct amba_device *adev, const struct amba_id *id)
 	return PTR_ERR(drvdata->csdev);
 }
 
-static int tpiu_remove(struct amba_device *adev)
+static void tpiu_remove(struct amba_device *adev)
 {
 	struct tpiu_drvdata *drvdata = dev_get_drvdata(&adev->dev);
 
 	coresight_unregister(drvdata->csdev);
-
-	return 0;
 }
 
 #ifdef CONFIG_PM

drivers/i2c/busses/i2c-nomadik.c

@@ -1055,7 +1055,7 @@ static int nmk_i2c_probe(struct amba_device *adev, const struct amba_id *id)
 	return ret;
 }
 
-static int nmk_i2c_remove(struct amba_device *adev)
+static void nmk_i2c_remove(struct amba_device *adev)
 {
 	struct resource *res = &adev->res;
 	struct nmk_i2c_dev *dev = amba_get_drvdata(adev);
@@ -1068,8 +1068,6 @@ static int nmk_i2c_remove(struct amba_device *adev)
 	i2c_clr_bit(dev->virtbase + I2C_CR, I2C_CR_PE);
 	clk_disable_unprepare(dev->clk);
 	release_mem_region(res->start, resource_size(res));
-
-	return 0;
 }
 
 static struct i2c_vendor_data vendor_stn8815 = {

drivers/input/serio/ambakmi.c

@@ -159,7 +159,7 @@ static int amba_kmi_probe(struct amba_device *dev,
 	return ret;
 }
 
-static int amba_kmi_remove(struct amba_device *dev)
+static void amba_kmi_remove(struct amba_device *dev)
 {
 	struct amba_kmi_port *kmi = amba_get_drvdata(dev);
 
@@ -168,7 +168,6 @@ static int amba_kmi_remove(struct amba_device *dev)
 	iounmap(kmi->base);
 	kfree(kmi);
 	amba_release_regions(dev);
-	return 0;
 }
 
 static int __maybe_unused amba_kmi_resume(struct device *dev)

drivers/mailbox/arm_mhuv2.c

@@ -1095,14 +1095,12 @@ static int mhuv2_probe(struct amba_device *adev, const struct amba_id *id)
 	return ret;
 }
 
-static int mhuv2_remove(struct amba_device *adev)
+static void mhuv2_remove(struct amba_device *adev)
 {
 	struct mhuv2 *mhu = amba_get_drvdata(adev);
 
 	if (mhu->frame == SENDER_FRAME)
 		writel_relaxed(0x0, &mhu->send->access_request);
-
-	return 0;
 }
 
 static struct amba_id mhuv2_ids[] = {

drivers/memory/pl172.c

@@ -273,14 +273,12 @@ static int pl172_probe(struct amba_device *adev, const struct amba_id *id)
 	return ret;
 }
 
-static int pl172_remove(struct amba_device *adev)
+static void pl172_remove(struct amba_device *adev)
 {
 	struct pl172_data *pl172 = amba_get_drvdata(adev);
 
 	clk_disable_unprepare(pl172->clk);
 	amba_release_regions(adev);
-
-	return 0;
 }
 
 static const struct amba_id pl172_ids[] = {

drivers/memory/pl353-smc.c

@@ -426,14 +426,12 @@ static int pl353_smc_probe(struct amba_device *adev, const struct amba_id *id)
 	return err;
 }
 
-static int pl353_smc_remove(struct amba_device *adev)
+static void pl353_smc_remove(struct amba_device *adev)
 {
 	struct pl353_smc_data *pl353_smc = amba_get_drvdata(adev);
 
 	clk_disable_unprepare(pl353_smc->memclk);
 	clk_disable_unprepare(pl353_smc->aclk);
-
-	return 0;
 }
 
 static const struct amba_id pl353_ids[] = {

drivers/mmc/host/mmci.c

@@ -2195,7 +2195,7 @@ static int mmci_probe(struct amba_device *dev,
 	return ret;
 }
 
-static int mmci_remove(struct amba_device *dev)
+static void mmci_remove(struct amba_device *dev)
 {
 	struct mmc_host *mmc = amba_get_drvdata(dev);
 
@@ -2223,8 +2223,6 @@ static int mmci_remove(struct amba_device *dev)
 		clk_disable_unprepare(host->clk);
 		mmc_free_host(mmc);
 	}
-
-	return 0;
 }
 
 #ifdef CONFIG_PM

drivers/rtc/rtc-pl030.c

@@ -137,7 +137,7 @@ static int pl030_probe(struct amba_device *dev, const struct amba_id *id)
 	return ret;
 }
 
-static int pl030_remove(struct amba_device *dev)
+static void pl030_remove(struct amba_device *dev)
 {
 	struct pl030_rtc *rtc = amba_get_drvdata(dev);
 
@@ -146,8 +146,6 @@ static int pl030_remove(struct amba_device *dev)
 	free_irq(dev->irq[0], rtc);
 	iounmap(rtc->base);
 	amba_release_regions(dev);
-
-	return 0;
 }
 
 static struct amba_id pl030_ids[] = {

drivers/rtc/rtc-pl031.c

@@ -280,7 +280,7 @@ static int pl031_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
 	return 0;
 }
 
-static int pl031_remove(struct amba_device *adev)
+static void pl031_remove(struct amba_device *adev)
 {
 	struct pl031_local *ldata = dev_get_drvdata(&adev->dev);
 
@@ -289,8 +289,6 @@ static int pl031_remove(struct amba_device *adev)
 	if (adev->irq[0])
 		free_irq(adev->irq[0], ldata);
 	amba_release_regions(adev);
-
-	return 0;
 }
 
 static int pl031_probe(struct amba_device *adev, const struct amba_id *id)

drivers/spi/spi-pl022.c

@@ -2314,13 +2314,13 @@ static int pl022_probe(struct amba_device *adev, const struct amba_id *id)
 	return status;
 }
 
-static int
+static void
 pl022_remove(struct amba_device *adev)
 {
 	struct pl022 *pl022 = amba_get_drvdata(adev);
 
 	if (!pl022)
-		return 0;
+		return;
 
 	/*
 	 * undo pm_runtime_put() in probe.  I assume that we're not
@@ -2335,7 +2335,6 @@ pl022_remove(struct amba_device *adev)
 	clk_disable_unprepare(pl022->clk);
 	amba_release_regions(adev);
 	tasklet_disable(&pl022->pump_transfers);
-	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP

drivers/tty/serial/amba-pl010.c

@@ -754,7 +754,7 @@ static int pl010_probe(struct amba_device *dev, const struct amba_id *id)
 	return ret;
 }
 
-static int pl010_remove(struct amba_device *dev)
+static void pl010_remove(struct amba_device *dev)
 {
 	struct uart_amba_port *uap = amba_get_drvdata(dev);
 	int i;
@@ -770,8 +770,6 @@ static int pl010_remove(struct amba_device *dev)
 
 	if (!busy)
 		uart_unregister_driver(&amba_reg);
-
-	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP

drivers/tty/serial/amba-pl011.c

@@ -2679,13 +2679,12 @@ static int pl011_probe(struct amba_device *dev, const struct amba_id *id)
 	return pl011_register_port(uap);
 }
 
-static int pl011_remove(struct amba_device *dev)
+static void pl011_remove(struct amba_device *dev)
 {
 	struct uart_amba_port *uap = amba_get_drvdata(dev);
 
 	uart_remove_one_port(&amba_reg, &uap->port);
 	pl011_unregister_port(uap);
-	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP

drivers/vfio/platform/vfio_amba.c

@@ -71,18 +71,13 @@ static int vfio_amba_probe(struct amba_device *adev, const struct amba_id *id)
 	return ret;
 }
 
-static int vfio_amba_remove(struct amba_device *adev)
+static void vfio_amba_remove(struct amba_device *adev)
 {
-	struct vfio_platform_device *vdev;
+	struct vfio_platform_device *vdev =
+		vfio_platform_remove_common(&adev->dev);
 
-	vdev = vfio_platform_remove_common(&adev->dev);
-	if (vdev) {
 	kfree(vdev->name);
 	kfree(vdev);
-		return 0;
-	}
-
-	return -EINVAL;
 }
 
 static const struct amba_id pl330_ids[] = {

drivers/video/fbdev/amba-clcd.c

@@ -925,7 +925,7 @@ static int clcdfb_probe(struct amba_device *dev, const struct amba_id *id)
 	return ret;
 }
 
-static int clcdfb_remove(struct amba_device *dev)
+static void clcdfb_remove(struct amba_device *dev)
 {
 	struct clcd_fb *fb = amba_get_drvdata(dev);
 
@@ -942,8 +942,6 @@ static int clcdfb_remove(struct amba_device *dev)
 	kfree(fb);
 
 	amba_release_regions(dev);
-
-	return 0;
 }
 
 static const struct amba_id clcdfb_id_table[] = {

drivers/watchdog/sp805_wdt.c

@@ -305,14 +305,12 @@ sp805_wdt_probe(struct amba_device *adev, const struct amba_id *id)
 	return ret;
 }
 
-static int sp805_wdt_remove(struct amba_device *adev)
+static void sp805_wdt_remove(struct amba_device *adev)
 {
 	struct sp805_wdt *wdt = amba_get_drvdata(adev);
 
 	watchdog_unregister_device(&wdt->wdd);
 	watchdog_set_drvdata(&wdt->wdd, NULL);
-
-	return 0;
 }
 
 static int __maybe_unused sp805_wdt_suspend(struct device *dev)

include/linux/amba/bus.h

@@ -76,7 +76,7 @@ struct amba_device {
 struct amba_driver {
 	struct device_driver	drv;
 	int			(*probe)(struct amba_device *, const struct amba_id *);
-	int			(*remove)(struct amba_device *);
+	void			(*remove)(struct amba_device *);
 	void			(*shutdown)(struct amba_device *);
 	const struct amba_id	*id_table;
 };

sound/arm/aaci.c

@@ -1055,7 +1055,7 @@ static int aaci_probe(struct amba_device *dev,
 	return ret;
 }
 
-static int aaci_remove(struct amba_device *dev)
+static void aaci_remove(struct amba_device *dev)
 {
 	struct snd_card *card = amba_get_drvdata(dev);
 
@@ -1066,8 +1066,6 @@ static int aaci_remove(struct amba_device *dev)
 		snd_card_free(card);
 		amba_release_regions(dev);
 	}
-
-	return 0;
 }
 
 static struct amba_id aaci_ids[] = {