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Kirill Smelkov
linux
Commits
e8d1d9de
Commit
e8d1d9de
authored
Oct 07, 2003
by
Michael Hunold
Committed by
Linus Torvalds
Oct 07, 2003
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[PATCH] multiple device *read* opens support
- allow multiple read device opens
parent
38beb0c0
Changes
3
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Showing
3 changed files
with
17 additions
and
3 deletions
+17
-3
drivers/media/dvb/dvb-core/dvb_frontend.c
drivers/media/dvb/dvb-core/dvb_frontend.c
+1
-0
drivers/media/dvb/dvb-core/dvbdev.c
drivers/media/dvb/dvb-core/dvbdev.c
+9
-2
drivers/media/dvb/dvb-core/dvbdev.h
drivers/media/dvb/dvb-core/dvbdev.h
+7
-1
No files found.
drivers/media/dvb/dvb-core/dvb_frontend.c
View file @
e8d1d9de
...
...
@@ -870,6 +870,7 @@ dvb_register_frontend (int (*ioctl) (struct dvb_frontend *frontend,
static
const
struct
dvb_device
dvbdev_template
=
{
.
users
=
~
0
,
.
writers
=
1
,
.
readers
=
(
~
0
)
-
1
,
.
fops
=
&
dvb_frontend_fops
,
.
kernel_ioctl
=
dvb_frontend_ioctl
};
...
...
drivers/media/dvb/dvb-core/dvbdev.c
View file @
e8d1d9de
...
...
@@ -112,7 +112,11 @@ int dvb_generic_open(struct inode *inode, struct file *file)
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 +134,11 @@ int dvb_generic_release(struct inode *inode, struct file *file)
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
;
...
...
drivers/media/dvb/dvb-core/dvbdev.h
View file @
e8d1d9de
...
...
@@ -55,12 +55,18 @@ struct dvb_adapter {
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
,
...
...
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