From: Ben Hutchings <ben@decadent.org.uk>
Date: Mon, 28 Sep 2015 00:34:21 +0000 (+0100)
Subject: rtsx_usb_ms: Use msleep_interruptible() in polling loop
X-Git-Tag: archive/raspbian/4.9.13-1+rpi1~55
X-Git-Url: https://dgit.raspbian.org/%22http:/www.example.com//styles.css/%22http:/www.example.com/styles.css?a=commitdiff_plain;h=e48f891e9f50367586669085ceca155d05478a9f;p=linux-4.9.git

rtsx_usb_ms: Use msleep_interruptible() in polling loop

rtsx_usb_ms creates a task that mostly sleeps, but tasks in
uninterruptible sleep still contribute to the load average (for
bug-compatibility with Unix).  A load average of ~1 on a system that
should be idle is somewhat alarming.

Change the sleep to be interruptible, but still ignore signals.

A better fix might be to replace this loop with a delayed work item.

References: https://bugs.debian.org/765717
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

Gbp-Pq: Topic bugfix/all
Gbp-Pq: Name rtsx_usb_ms-use-msleep_interruptible-in-polling-loop.patch
---

diff --git a/drivers/memstick/host/rtsx_usb_ms.c b/drivers/memstick/host/rtsx_usb_ms.c
index 1105db2355d2..645dedeb30ad 100644
--- a/drivers/memstick/host/rtsx_usb_ms.c
+++ b/drivers/memstick/host/rtsx_usb_ms.c
@@ -706,7 +706,8 @@ poll_again:
 		if (host->eject)
 			break;
 
-		msleep(1000);
+		if (msleep_interruptible(1000))
+			flush_signals(current);
 	}
 
 	complete(&host->detect_ms_exit);