diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index b769c1faaf0385dff2543592e2fe68745d1fc7c5..f2050e844b4bae97dec305180287672c69781a92 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -186,10 +186,8 @@ static int dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned length)
 
 	dwc->ev_buffs = devm_kzalloc(dwc->dev, sizeof(*dwc->ev_buffs) * num,
 			GFP_KERNEL);
-	if (!dwc->ev_buffs) {
-		dev_err(dwc->dev, "can't allocate event buffers array\n");
+	if (!dwc->ev_buffs)
 		return -ENOMEM;
-	}
 
 	for (i = 0; i < num; i++) {
 		struct dwc3_event_buffer	*evt;
@@ -639,10 +637,9 @@ static int dwc3_probe(struct platform_device *pdev)
 	void			*mem;
 
 	mem = devm_kzalloc(dev, sizeof(*dwc) + DWC3_ALIGN_MASK, GFP_KERNEL);
-	if (!mem) {
-		dev_err(dev, "not enough memory\n");
+	if (!mem)
 		return -ENOMEM;
-	}
+
 	dwc = PTR_ALIGN(mem, DWC3_ALIGN_MASK + 1);
 	dwc->mem = mem;
 	dwc->dev = dev;
diff --git a/drivers/usb/dwc3/dwc3-exynos.c b/drivers/usb/dwc3/dwc3-exynos.c
index f9fb8adb785b7eb35c158dd2e9ad8e5f577fe6d8..3951a65fea048c51d6fec6b2eda72563fff5cd8a 100644
--- a/drivers/usb/dwc3/dwc3-exynos.c
+++ b/drivers/usb/dwc3/dwc3-exynos.c
@@ -113,10 +113,8 @@ static int dwc3_exynos_probe(struct platform_device *pdev)
 	int			ret;
 
 	exynos = devm_kzalloc(dev, sizeof(*exynos), GFP_KERNEL);
-	if (!exynos) {
-		dev_err(dev, "not enough memory\n");
+	if (!exynos)
 		return -ENOMEM;
-	}
 
 	/*
 	 * Right now device-tree probed devices don't get dma_mask set.
diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c
index ef4936ff626c3cdea2bd0bc6e0a7e7328481a3a7..76345aceb4b6ae2a56832a41a18425daa15218b3 100644
--- a/drivers/usb/dwc3/dwc3-omap.c
+++ b/drivers/usb/dwc3/dwc3-omap.c
@@ -481,10 +481,8 @@ static int dwc3_omap_probe(struct platform_device *pdev)
 	}
 
 	omap = devm_kzalloc(dev, sizeof(*omap), GFP_KERNEL);
-	if (!omap) {
-		dev_err(dev, "not enough memory\n");
+	if (!omap)
 		return -ENOMEM;
-	}
 
 	platform_set_drvdata(pdev, omap);
 
diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c
index a60bab7dfa0a431cce7fb79e9b33eaf9a65f14da..436fb08c40b8785f16e224241039e7c63899fde9 100644
--- a/drivers/usb/dwc3/dwc3-pci.c
+++ b/drivers/usb/dwc3/dwc3-pci.c
@@ -103,10 +103,8 @@ static int dwc3_pci_probe(struct pci_dev *pci,
 	struct device		*dev = &pci->dev;
 
 	glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);
-	if (!glue) {
-		dev_err(dev, "not enough memory\n");
+	if (!glue)
 		return -ENOMEM;
-	}
 
 	glue->dev = dev;
 
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 349cacc577d81a679cacd4494bb7ead82f11cfa4..307b5139faf3121bf9be7bb7db0c5532f34165cc 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -789,13 +789,10 @@ static struct usb_request *dwc3_gadget_ep_alloc_request(struct usb_ep *ep,
 {
 	struct dwc3_request		*req;
 	struct dwc3_ep			*dep = to_dwc3_ep(ep);
-	struct dwc3			*dwc = dep->dwc;
 
 	req = kzalloc(sizeof(*req), gfp_flags);
-	if (!req) {
-		dev_err(dwc->dev, "not enough memory\n");
+	if (!req)
 		return NULL;
-	}
 
 	req->epnum	= dep->number;
 	req->dep	= dep;
@@ -1743,11 +1740,8 @@ static int dwc3_gadget_init_hw_endpoints(struct dwc3 *dwc,
 		u8 epnum = (i << 1) | (!!direction);
 
 		dep = kzalloc(sizeof(*dep), GFP_KERNEL);
-		if (!dep) {
-			dev_err(dwc->dev, "can't allocate endpoint %d\n",
-					epnum);
+		if (!dep)
 			return -ENOMEM;
-		}
 
 		dep->dwc = dwc;
 		dep->number = epnum;
@@ -2759,7 +2753,6 @@ int dwc3_gadget_init(struct dwc3 *dwc)
 
 	dwc->setup_buf = kzalloc(DWC3_EP0_BOUNCE_SIZE, GFP_KERNEL);
 	if (!dwc->setup_buf) {
-		dev_err(dwc->dev, "failed to allocate setup buffer\n");
 		ret = -ENOMEM;
 		goto err2;
 	}