linux-kernel - [PATCH 2/2] xhci:prevent "callbacks suppressed" when debug is not enabled

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Date:	Thu, 15 Aug 2013 19:04:55 +0300
From:	Dmitry Kasatkin <d.kasatkin@...sung.com>
To:	linux-kernel@...r.kernel.org, gregkh@...uxfoundation.org,
	sarah.a.sharp@...ux.intel.com
Cc:	dmitry.kasatkin@...il.com
Subject: [PATCH 2/2] xhci:prevent "callbacks suppressed" when debug is not
 enabled

When debug is not enabled and dev_dbg() will expand to nothing,
log might be flooded with "callbacks suppressed". If it was not
done on purpose, better to use dev_dbg_ratelimited() instead.

Signed-off-by: Dmitry Kasatkin <d.kasatkin@...sung.com>
---
 drivers/usb/host/xhci-ring.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 5b08cd8..5298232 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -3060,8 +3060,7 @@ int xhci_queue_intr_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
 	 * to set the polling interval (once the API is added).
 	 */
 	if (xhci_interval != ep_interval) {
-		if (printk_ratelimit())
-			dev_dbg(&urb->dev->dev, "Driver uses different interval"
+		dev_dbg_ratelimited(&urb->dev->dev, "Driver uses different interval"
 					" (%d microframe%s) than xHCI "
 					"(%d microframe%s)\n",
 					ep_interval,
@@ -3849,8 +3848,7 @@ int xhci_queue_isoc_tx_prepare(struct xhci_hcd *xhci, gfp_t mem_flags,
 	 * to set the polling interval (once the API is added).
 	 */
 	if (xhci_interval != ep_interval) {
-		if (printk_ratelimit())
-			dev_dbg(&urb->dev->dev, "Driver uses different interval"
+		dev_dbg_ratelimited(&urb->dev->dev, "Driver uses different interval"
 					" (%d microframe%s) than xHCI "
 					"(%d microframe%s)\n",
 					ep_interval,
-- 
1.8.1.2

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