linux-kernel - [PATCH v2] usb: xhci: Remove unuseful 'return' and 'break' statement

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Date:   Thu, 24 Nov 2016 19:16:15 +0800
From:   Baolin Wang <baolin.wang@...aro.org>
To:     mathias.nyman@...el.com, gregkh@...uxfoundation.org
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        broonie@...nel.org, baolin.wang@...aro.org
Subject: [PATCH v2] usb: xhci: Remove unuseful 'return' and 'break' statement

Since these 'return' statements are not generally useful in void
function, remove them. Also remove one unuseful 'break' statement
in xhci_setup_addressable_virt_dev() function.

Signed-off-by: Baolin Wang <baolin.wang@...aro.org>
---
Changes since v1:
 - Add description of removing 'break' statement in commitlog.
---
 drivers/usb/host/xhci-hub.c  |    2 --
 drivers/usb/host/xhci-mem.c  |    1 -
 drivers/usb/host/xhci-ring.c |    4 ----
 drivers/usb/host/xhci.c      |    3 ---
 4 files changed, 10 deletions(-)

diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index 0ef1690..470ad66 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -444,8 +444,6 @@ void xhci_ring_device(struct xhci_hcd *xhci, int slot_id)
 			xhci_ring_ep_doorbell(xhci, slot_id, i, 0);
 		}
 	}
-
-	return;
 }
 
 static void xhci_disable_port(struct usb_hcd *hcd, struct xhci_hcd *xhci,
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index 48a26d378..d6f59a3 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -1146,7 +1146,6 @@ int xhci_setup_addressable_virt_dev(struct xhci_hcd *xhci, struct usb_device *ud
 	case USB_SPEED_WIRELESS:
 		xhci_dbg(xhci, "FIXME xHCI doesn't support wireless speeds\n");
 		return -EINVAL;
-		break;
 	default:
 		/* Speed was set earlier, this shouldn't happen. */
 		return -EINVAL;
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index d415911..2057d08 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -157,7 +157,6 @@ static void inc_deq(struct xhci_hcd *xhci, struct xhci_ring *ring)
 		ring->deq_seg = ring->deq_seg->next;
 		ring->dequeue = ring->deq_seg->trbs;
 	}
-	return;
 }
 
 /*
@@ -1167,7 +1166,6 @@ static void xhci_handle_cmd_config_ep(struct xhci_hcd *xhci, int slot_id,
 		ring_doorbell_for_active_rings(xhci, slot_id, ep_index);
 		return;
 	}
-	return;
 }
 
 static void xhci_handle_cmd_reset_dev(struct xhci_hcd *xhci, int slot_id,
@@ -1258,7 +1256,6 @@ static void xhci_handle_stopped_cmd_ring(struct xhci_hcd *xhci,
 		mod_timer(&xhci->cmd_timer, jiffies + XHCI_CMD_DEFAULT_TIMEOUT);
 		xhci_ring_cmd_db(xhci);
 	}
-	return;
 }
 
 
@@ -1307,7 +1304,6 @@ void xhci_handle_command_timeout(unsigned long data)
 	xhci_dbg(xhci, "Command timeout on stopped ring\n");
 	xhci_handle_stopped_cmd_ring(xhci, xhci->current_cmd);
 	spin_unlock_irqrestore(&xhci->lock, flags);
-	return;
 }
 
 static void handle_cmd_completion(struct xhci_hcd *xhci,
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index cf30cb6..dc337b3 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -269,8 +269,6 @@ static void xhci_free_irq(struct xhci_hcd *xhci)
 		return;
 	if (pdev->irq > 0)
 		free_irq(pdev->irq, xhci_to_hcd(xhci));
-
-	return;
 }
 
 /*
@@ -351,7 +349,6 @@ static void xhci_cleanup_msix(struct xhci_hcd *xhci)
 	}
 
 	hcd->msix_enabled = 0;
-	return;
 }
 
 static void __maybe_unused xhci_msix_sync_irqs(struct xhci_hcd *xhci)
-- 
1.7.9.5