linux-kernel - [PATCH v3] rfkill-input doesn't work until 5 minutes after boot

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Message-ID: <20081005110226.GB4087@srcf.ucam.org>
Date:	Sun, 5 Oct 2008 12:02:26 +0100
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	dmitry.torokhov@...il.com, IvDoorn@...il.com, hmh@....eng.br
Cc:	sitsofe@...oo.com, linux-kernel@...r.kernel.org
Subject: [PATCH v3] rfkill-input doesn't work until 5 minutes after boot

rfkill-input implements debounce as follows:

        if (time_after(jiffies, task->last + msecs_to_jiffies(200))) {

However, task->last is initialised to 0 while jiffies starts at -300*HZ. 
Any input within 5 minutes of kernel start is therefore ignored. Fix by 
initialising task->last correctly.

Signed-off-by: Matthew Garrett <mjg@...hat.com>

---

Document the requirement to initialise the struct.

diff --git a/net/rfkill/rfkill-input.c b/net/rfkill/rfkill-input.c
index e5b6955..6c7baa0 100644
--- a/net/rfkill/rfkill-input.c
+++ b/net/rfkill/rfkill-input.c
@@ -103,6 +103,8 @@ static void rfkill_schedule_toggle(struct rfkill_task *task)
 		.desired_state = RFKILL_STATE_UNBLOCKED,	\
 	}
 
+/* Remember to initialise these in rfkill_handler_init if you add any */
+
 static DEFINE_RFKILL_TASK(rfkill_wlan, RFKILL_TYPE_WLAN);
 static DEFINE_RFKILL_TASK(rfkill_bt, RFKILL_TYPE_BLUETOOTH);
 static DEFINE_RFKILL_TASK(rfkill_uwb, RFKILL_TYPE_UWB);
@@ -255,6 +257,11 @@ static struct input_handler rfkill_handler = {
 
 static int __init rfkill_handler_init(void)
 {
+	rfkill_wlan.last = jiffies - HZ/5;
+	rfkill_bt.last = jiffies - HZ/5;
+	rfkill_uwb.last = jiffies - HZ/5;
+	rfkill_wimax.last = jiffies - HZ/5;
+	rfkill_wwan.last = jiffies - HZ/5;
 	return input_register_handler(&rfkill_handler);
 }
 

-- 
Matthew Garrett | mjg59@...f.ucam.org
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