From b9d5efcceb6b34ee20111b62cf7be61ae79af4e9 Mon Sep 17 00:00:00 2001 From: Andreas Oberritter Date: Fri, 9 Dec 2011 21:37:00 -0300 Subject: [PATCH] [media] DVB: dvb_frontend: fix delayed thread exit There are some issues and miss-behaves at the dvb fe thread: 1) dvb_shutdown_timeout should be dvb_shutdown_timeout * HZ instead of (dvb_shutdown_timeout * HZ + 1); 2) add a memory barrier to warrant that all CPU's will consider the new value for release_jiffies; 3) wake up dvb thread also when fepriv->exit == DVB_FE_NO_EXIT. Signed-off-by: Andreas Oberritter Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb/dvb-core/dvb_frontend.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/media/dvb/dvb-core/dvb_frontend.c b/drivers/media/dvb/dvb-core/dvb_frontend.c index 66537b10132c..3ff37cfde6ab 100644 --- a/drivers/media/dvb/dvb-core/dvb_frontend.c +++ b/drivers/media/dvb/dvb-core/dvb_frontend.c @@ -507,7 +507,7 @@ static int dvb_frontend_is_exiting(struct dvb_frontend *fe) return 1; if (fepriv->dvbdev->writers == 1) - if (time_after(jiffies, fepriv->release_jiffies + + if (time_after_eq(jiffies, fepriv->release_jiffies + dvb_shutdown_timeout * HZ)) return 1; @@ -2116,12 +2116,15 @@ static int dvb_frontend_release(struct inode *inode, struct file *file) dprintk ("%s\n", __func__); - if ((file->f_flags & O_ACCMODE) != O_RDONLY) + if ((file->f_flags & O_ACCMODE) != O_RDONLY) { fepriv->release_jiffies = jiffies; + mb(); + } ret = dvb_generic_release (inode, file); if (dvbdev->users == -1) { + wake_up(&fepriv->wait_queue); if (fepriv->exit != DVB_FE_NO_EXIT) { fops_put(file->f_op); file->f_op = NULL; -- GitLab