usb: phy: fix return value check of usb_get_phy

usb_get_phy will return -ENODEV if it's not able to find the phy. Hence
fixed all the callers of usb_get_phy to check for this error condition
instead of relying on a non-zero value as success condition.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

4 files changed, 14 insertions, 13 deletions

diff --git a/drivers/power/ab8500_charger.c b/drivers/power/ab8500_charger.c
index 6bd6f1c41967..d4f0c98428cb 100644
--- a/drivers/power/ab8500_charger.c
+++ b/drivers/power/ab8500_charger.c
@@ -2689,7 +2689,7 @@ static int __devinit ab8500_charger_probe(struct platform_device *pdev)
 	}
 
 	di->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
-	if (!di->usb_phy) {
+	if (IS_ERR_OR_NULL(di->usb_phy)) {
 		dev_err(di->dev, "failed to get usb transceiver\n");
 		ret = -EINVAL;
 		goto free_usb;
diff --git a/drivers/power/isp1704_charger.c b/drivers/power/isp1704_charger.c
index 090e5f9e72c9..122911978da2 100644
--- a/drivers/power/isp1704_charger.c
+++ b/drivers/power/isp1704_charger.c
@@ -416,7 +416,7 @@ static int __devinit isp1704_charger_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	isp->phy = usb_get_phy(USB_PHY_TYPE_USB2);
-	if (!isp->phy)
+	if (IS_ERR_OR_NULL(isp->phy))
 		goto fail0;
 
 	isp->dev = &pdev->dev;
diff --git a/drivers/power/pda_power.c b/drivers/power/pda_power.c
index 7602d49e4d81..8dbcd53c5e67 100644
--- a/drivers/power/pda_power.c
+++ b/drivers/power/pda_power.c
@@ -322,11 +322,11 @@ static int pda_power_probe(struct platform_device *pdev)
 
 #ifdef CONFIG_USB_OTG_UTILS
 	transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
-	if (transceiver && !pdata->is_usb_online) {
-		pdata->is_usb_online = otg_is_usb_online;
-	}
-	if (transceiver && !pdata->is_ac_online) {
-		pdata->is_ac_online = otg_is_ac_online;
+	if (!IS_ERR_OR_NULL(transceiver)) {
+		if (!pdata->is_usb_online)
+			pdata->is_usb_online = otg_is_usb_online;
+		if (!pdata->is_ac_online)
+			pdata->is_ac_online = otg_is_ac_online;
 	}
 #endif
 
@@ -373,7 +373,7 @@ static int pda_power_probe(struct platform_device *pdev)
 	}
 
 #ifdef CONFIG_USB_OTG_UTILS
-	if (transceiver && pdata->use_otg_notifier) {
+	if (!IS_ERR_OR_NULL(transceiver) && pdata->use_otg_notifier) {
 		otg_nb.notifier_call = otg_handle_notification;
 		ret = usb_register_notifier(transceiver, &otg_nb);
 		if (ret) {
@@ -408,7 +408,7 @@ usb_supply_failed:
 	if (pdata->is_ac_online && ac_irq)
 		free_irq(ac_irq->start, &pda_psy_ac);
 #ifdef CONFIG_USB_OTG_UTILS
-	if (transceiver)
+	if (!IS_ERR_OR_NULL(transceiver))
 		usb_put_phy(transceiver);
 #endif
 ac_irq_failed:
@@ -443,7 +443,7 @@ static int pda_power_remove(struct platform_device *pdev)
 	if (pdata->is_ac_online)
 		power_supply_unregister(&pda_psy_ac);
 #ifdef CONFIG_USB_OTG_UTILS
-	if (transceiver)
+	if (!IS_ERR_OR_NULL(transceiver))
 		usb_put_phy(transceiver);
 #endif
 	if (ac_draw) {
diff --git a/drivers/power/twl4030_charger.c b/drivers/power/twl4030_charger.c
index 13f9db2e8538..7cacbaa68efe 100644
--- a/drivers/power/twl4030_charger.c
+++ b/drivers/power/twl4030_charger.c
@@ -15,6 +15,7 @@
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/slab.h>
+#include <linux/err.h>
 #include <linux/platform_device.h>
 #include <linux/interrupt.h>
 #include <linux/i2c/twl.h>
@@ -480,7 +481,7 @@ static int __init twl4030_bci_probe(struct platform_device *pdev)
 	INIT_WORK(&bci->work, twl4030_bci_usb_work);
 
 	bci->transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
-	if (bci->transceiver != NULL) {
+	if (!IS_ERR_OR_NULL(bci->transceiver)) {
 		bci->usb_nb.notifier_call = twl4030_bci_usb_ncb;
 		usb_register_notifier(bci->transceiver, &bci->usb_nb);
 	}
@@ -507,7 +508,7 @@ static int __init twl4030_bci_probe(struct platform_device *pdev)
 	return 0;
 
 fail_unmask_interrupts:
-	if (bci->transceiver != NULL) {
+	if (!IS_ERR_OR_NULL(bci->transceiver)) {
 		usb_unregister_notifier(bci->transceiver, &bci->usb_nb);
 		usb_put_phy(bci->transceiver);
 	}
@@ -538,7 +539,7 @@ static int __exit twl4030_bci_remove(struct platform_device *pdev)
 	twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff,
 			 TWL4030_INTERRUPTS_BCIIMR2A);
 
-	if (bci->transceiver != NULL) {
+	if (!IS_ERR_OR_NULL(bci->transceiver)) {
 		usb_unregister_notifier(bci->transceiver, &bci->usb_nb);
 		usb_put_phy(bci->transceiver);
 	}