From: Michael Hunold (LinuxTV.org CVS maintainer) <hunold@linuxtv.org>
To: linux-kernel@vger.kernel.org
Subject: [PATCH 5/14] multiple device *read* opens support
Date: Wed, 8 Oct 2003 15:28:53 +0200 [thread overview]
Message-ID: <1065619733696@convergence.de> (raw)
In-Reply-To: <1065619733417@convergence.de>
- [DVB] allow multiple read device opens
diff -uNrwB --new-file xx-linux-2.6.0-test5/drivers/media/dvb/dvb-core/dvbdev.h linux-2.6.0-test5/drivers/media/dvb/dvb-core/dvbdev.h
--- xx-linux-2.6.0-test5/drivers/media/dvb/dvb-core/dvbdev.h 2003-09-10 11:28:41.000000000 +0200
+++ linux-2.6.0-test5/drivers/media/dvb/dvb-core/dvbdev.h 2003-08-25 12:16:12.000000000 +0200
@@ -55,12 +58,18 @@
struct dvb_device {
struct list_head list_head;
struct file_operations *fops;
+
+
+
struct dvb_adapter *adapter;
int type;
u32 id;
- int users;
+ /* in theory, 'users' can vanish now,
+ but I don't want to change too much now... */
+ int readers;
int writers;
+ int users;
/* don't really need those !? -- FIXME: use video_usercopy */
int (*kernel_ioctl)(struct inode *inode, struct file *file,
diff -uNrwB --new-file xx-linux-2.6.0-test5/drivers/media/dvb/dvb-core/dvbdev.c linux-2.6.0-test5/drivers/media/dvb/dvb-core/dvbdev.c
--- xx-linux-2.6.0-test5/drivers/media/dvb/dvb-core/dvbdev.c 2003-09-10 11:29:20.000000000 +0200
+++ linux-2.6.0-test5/drivers/media/dvb/dvb-core/dvbdev.c 2003-08-21 10:53:19.000000000 +0200
@@ -112,7 +121,11 @@
if (!dvbdev->users)
return -EBUSY;
- if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
+ if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
+ if (!dvbdev->readers)
+ return -EBUSY;
+ dvbdev->readers--;
+ } else {
if (!dvbdev->writers)
return -EBUSY;
dvbdev->writers--;
@@ -130,8 +143,11 @@
if (!dvbdev)
return -ENODEV;
- if ((file->f_flags & O_ACCMODE) != O_RDONLY)
+ if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
+ dvbdev->readers++;
+ } else {
dvbdev->writers++;
+ }
dvbdev->users++;
return 0;
diff -uNrwB --new-file xx-linux-2.6.0-test5/drivers/media/dvb/dvb-core/dvb_frontend.c linux-2.6.0-test5/drivers/media/dvb/dvb-core/dvb_frontend.c
--- xx-linux-2.6.0-test5/drivers/media/dvb/dvb-core/dvb_frontend.c 2003-09-10 11:28:54.000000000 +0200
+++ linux-2.6.0-test5/drivers/media/dvb/dvb-core/dvb_frontend.c 2003-09-09 09:24:21.000000000 +0200
@@ -870,6 +886,7 @@
static const struct dvb_device dvbdev_template = {
.users = ~0,
.writers = 1,
+ .readers = (~0)-1,
.fops = &dvb_frontend_fops,
.kernel_ioctl = dvb_frontend_ioctl
};
next prev parent reply other threads:[~2003-10-08 13:35 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-10-08 13:28 [PATCH 1/14] LinuxTV.org DVB driver update Michael Hunold
2003-10-08 13:28 ` [PATCH 2/14] firmware update for av7110 dvb driver Michael Hunold
2003-10-08 13:28 ` [PATCH 3/14] add new DVB-T frontend driver Michael Hunold
2003-10-08 13:28 ` [PATCH 4/14] video capture updates for saa7146 core Michael Hunold
2003-10-08 13:28 ` Michael Hunold [this message]
2003-10-08 13:28 ` [PATCH 6/14] update copyright and licensing Michael Hunold
2003-10-08 13:28 ` [PATCH 7/14] usual c99 initializer fixes Michael Hunold
2003-10-08 13:28 ` [PATCH 8/14] various patches for non-av7110 dvb-drivers Michael Hunold
2003-10-08 13:28 ` [PATCH 9/14] various av7110 dvb-driver updates Michael Hunold
2003-10-08 13:28 ` [PATCH 10/14] update dvb frontend drivers Michael Hunold
2003-10-08 13:28 ` [PATCH 11/14] Kconfig and Makefile updates, inspired by Adrian Bunk and Roman Zippel Michael Hunold
2003-10-08 13:28 ` [PATCH 12/14] some more av7110 dvb-driver updates Michael Hunold
2003-10-08 13:29 ` [PATCH 13/14] fix v4l1 backward compatibility in saa7146 driver Michael Hunold
2003-10-08 13:29 ` [PATCH 14/14] firmware blob for new DVB-T frontend driver Michael Hunold
2003-10-08 14:45 ` [PATCH 2/14] firmware update for av7110 dvb driver Marcel Holtmann
2003-10-08 15:36 ` Michael Hunold
2003-10-08 15:54 ` Michael Hunold
2003-10-12 21:42 ` Manuel Estrada Sainz
2003-10-11 11:59 ` Jochen Friedrich
2003-10-10 20:15 ` [PATCH 1/14] LinuxTV.org DVB driver update Stephen Hemminger
2003-10-11 8:41 ` Michael Hunold
2003-10-11 17:53 ` David S. Miller
2003-10-12 9:16 ` Geert Uytterhoeven
2003-10-12 11:08 ` Sam Ravnborg
2003-10-12 20:14 ` Michael Hunold
2003-10-13 16:01 ` Stephen Hemminger
2003-10-14 9:59 ` Michael Hunold
2003-10-12 20:10 ` Michael Hunold
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1065619733696@convergence.de \
--to=hunold@linuxtv.org \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox