From 7fc0315de16d99ba29b4ffc565996188d290fac9 Mon Sep 17 00:00:00 2001
From: Michal Suchanek <msuchanek@suse.de>
Date: Thu, 9 Nov 2017 12:12:36 +0100
Subject: [PATCH v2 1/8] cdrom: add poll_event_interruptible
References: bsc#1048585
Patch-mainline: submitted https://lore.kernel.org/lkml/cover.1571834862.git.msuchanek@suse.de/
Add convenience macro for polling an event that does not have a
waitqueue.
Signed-off-by: Michal Suchanek <msuchanek@suse.de>
---
drivers/cdrom/cdrom.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index ac42ae4651ce..2ad6b73482fe 100644
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -282,10 +282,24 @@
#include <linux/fcntl.h>
#include <linux/blkdev.h>
#include <linux/times.h>
+#include <linux/delay.h>
#include <linux/uaccess.h>
+#include <linux/sched/signal.h>
#include <scsi/scsi_common.h>
#include <scsi/scsi_request.h>
+#define poll_event_interruptible(event, interval) ({ \
+ int ret = 0; \
+ while (!(event)) { \
+ if (signal_pending(current)) { \
+ ret = -ERESTARTSYS; \
+ break; \
+ } \
+ msleep_interruptible(interval); \
+ } \
+ ret; \
+})
+
/* used to tell the module to turn on full debugging messages */
static bool debug;
/* default compatibility mode */
--
2.23.0