From: Bruno Prémont <bonbons@linux-vserver.org>
Date: Sun, 30 Sep 2012 20:04:19 +0000 (+0200)
Subject: HID: picoLCD: optimize for inactive debugfs
X-Git-Tag: v3.7-rc1~202^2~2^4
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=56fa94415b8a1a163e24a105fb5bdadc625c1d2a;p=~emulex%2Finfiniband.git

HID: picoLCD: optimize for inactive debugfs

Matthieu CASTET adjusted picolcd_debug_out_report() to only operate when
there is an active listener on debugfs for events.

His change got lost while splitting hid_picolcd.c, restore it.

Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---

diff --git a/drivers/hid/hid-picolcd_debugfs.c b/drivers/hid/hid-picolcd_debugfs.c
index 6ef03be352c..4809aa1bdb9 100644
--- a/drivers/hid/hid-picolcd_debugfs.c
+++ b/drivers/hid/hid-picolcd_debugfs.c
@@ -402,7 +402,7 @@ void picolcd_debug_out_report(struct picolcd_data *data,
 #define BUFF_SZ 256
 
 	/* Avoid unnecessary overhead if debugfs is disabled */
-	if (!hdev->debug_events)
+	if (list_empty(&hdev->debug_list))
 		return;
 
 	buff = kmalloc(BUFF_SZ, GFP_ATOMIC);