commit 86495af117 upstream.
In commit 9011e49d54 ("modules: only allow symbol_get of
EXPORT_SYMBOL_GPL modules") the use of symbol_get is properly restricted
to GPL-only marked symbols. This interacts oddly with the DVB logic
which only uses dvb_attach() to load the dvb driver which then uses
symbol_get().
Fix this up by properly marking all of the dvb_attach attach symbols as
EXPORT_SYMBOL_GPL().
Fixes: 9011e49d54 ("modules: only allow symbol_get of EXPORT_SYMBOL_GPL modules")
Cc: stable <stable@kernel.org>
Reported-by: Stefan Lippers-Hollmann <s.l-h@gmx.de>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: linux-media@vger.kernel.org
Cc: linux-modules@vger.kernel.org
Acked-by: Luis Chamberlain <mcgrof@kernel.org>
Acked-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Link: https://lore.kernel.org/r/20230908092035.3815268-2-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
An earlier commit removed a call to lgdt3306a_spectral_inversion and
omitted to remove the error return check. The check on ret is now
redundant and can be removed.
Addresses-Coverity: ("Logically dead code")
Fixes: d4a3fa6652 ("media: dvb-frontends: lgdt3306a.c: remove dead code")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Fix the following coccinelle report:
drivers/media/dvb-frontends/lgdt3306a.c:718:5-8:
Unneeded variable: "ret". Return "0" on line 744
Code was enclosed with #if 0 and thus this variable was not needed.
Remove that function altogether.
The lgdt3306a_spectral_inversion function was dropped completely
since the function doesn't do anything. A comment was left at its
calling site to let others know that spectral_inversion defaults
already set for VSB and QAM
Found using - Coccinelle (http://coccinelle.lip6.fr)
Link: https://lore.kernel.org/linux-media/20200903131311.442255-1-dwlsalmeida@gmail.com
Signed-off-by: Daniel W. S. Almeida <dwlsalmeida@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
The CNR is already calculated, so populate DVBv5 CNR stat
during read_status.
Signed-off-by: Brad Love <brad@nextdimension.cc>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Based on 3 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later version this program is distributed in the
hope that it will be useful but without any warranty without even
the implied warranty of merchantability or fitness for a particular
purpose see the gnu general public license for more details
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later version [author] [kishon] [vijay] [abraham]
[i] [kishon]@[ti] [com] this program is distributed in the hope that
it will be useful but without any warranty without even the implied
warranty of merchantability or fitness for a particular purpose see
the gnu general public license for more details
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later version [author] [graeme] [gregory]
[gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i]
[kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema]
[hk] [hemahk]@[ti] [com] this program is distributed in the hope
that it will be useful but without any warranty without even the
implied warranty of merchantability or fitness for a particular
purpose see the gnu general public license for more details
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-or-later
has been chosen to replace the boilerplate/reference in 1105 file(s).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
If lgdt3306a_read_reg() fails, the read data in "val" is incorrect, thus
shouldn't be further used. The fix inserts a check for the return value
of lgdt3306a_read_reg(). If it fails, goto fail.
Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
kmemdup has implemented the function that kmalloc() + memcpy().
We prefer to kmemdup rather than code opened implementation.
Signed-off-by: zhong jiang <zhongjiang@huawei.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Right now, satellite frontend drivers specify frequencies in kHz,
while terrestrial/cable ones specify in Hz. That's confusing
for developers.
However, the main problem is that universal frontends capable
of handling both satellite and non-satelite delivery systems
are appearing. We end by needing to hack the drivers in
order to support such hybrid frontends.
So, convert everything to specify frontend frequencies in Hz.
Tested-by: Katsuhiro Suzuki <suzuki.katsuhiro@socionext.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
The method dvb_frontend_ops::search() is defined as
returning an 'enum dvbfe_search', but the implementation in this
driver returns an 'int'.
Fix this by returning 'enum dvbfe_search' in this driver too.
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Acked-by: Brad Love <brad@nextdimension.cc>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This symbol mismatch is handled by NULL'ing out the release
callback if the driver is loaded as an i2c device.
This patch reverts:
- commit 94448e21cf ("media: lgdt3306a: Fix a double kfree on i2c
device remove")
- commit 835d66173a ("media: lgdt3306a: Fix module count mismatch
on usb unplug")
The symbol count mismatch is handled by:
- commit 5b3a8e9069 ("media: lgdt3306a: Set fe ops.release to
NULL if probed")
Signed-off-by: Brad Love <brad@nextdimension.cc>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
The driver is near silent, this adds a simple announcement at the
end of probe after the chip has been detected and upgrades a debug
message to error if probe has failed.
Signed-off-by: Brad Love <brad@nextdimension.cc>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Both lgdt33606a_release and lgdt3306a_remove kfree state, but _release is
called first, then _remove operates on states members before kfree'ing it.
This can lead to random oops/GPF/etc on USB disconnect.
Signed-off-by: Brad Love <brad@nextdimension.cc>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
When used as an i2c device there is a module usage count mismatch on
removal, preventing the driver from being used thereafter. dvb_attach
increments the usage count so it is properly balanced on removal.
On disconnect of Hauppauge SoloHD/DualHD before:
lsmod | grep lgdt3306a
lgdt3306a 28672 -1
i2c_mux 16384 1 lgdt3306a
On disconnect of Hauppauge SoloHD/DualHD after:
lsmod | grep lgdt3306a
lgdt3306a 28672 0
i2c_mux 16384 1 lgdt3306a
Signed-off-by: Brad Love <brad@nextdimension.cc>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
As configured currently, modulation in the driver is set to auto detect,
no matter what the user sets modulation to. This leads to both QAM64
and QAM256 having the same effect. QAM AUTO is explicitly added here for
compatibility with scanning software who can use AUTO instead of doing
essentially the same scan twice.
Also included is a module option to enforce a specific QAM modulation if
desired. The true modulation is read before calculating the snr.
Changes are backwards compatible with current behaviour.
Signed-off-by: Brad Love <brad@nextdimension.cc>
Reviewed-by: Michael Ira Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Add some register updates required for stable viewing
on Cablevision in NY. Does not adversely affect other providers.
Changes since v1:
- Change upper case hex to lower case.
Signed-off-by: Brad Love <brad@nextdimension.cc>
Reviewed-by: Michael Ira Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
If release is part of frontend ops then it is called in the
course of dvb_frontend_detach. The process also decrements
the module usage count. The problem is if the lgdt3306a
driver is reached via i2c_new_device, then when it is
eventually destroyed remove is called, which further
decrements the module usage count to negative. After this
occurs the driver is in a bad state and no longer works.
Also fixed by NULLing out the release callback is a double
kfree of state, which introduces arbitrary oopses/GPF.
This problem is only currently reachable via the em28xx driver.
On disconnect of Hauppauge SoloHD before:
lsmod | grep lgdt3306a
lgdt3306a 28672 -1
i2c_mux 16384 1 lgdt3306a
On disconnect of Hauppauge SoloHD after:
lsmod | grep lgdt3306a
lgdt3306a 28672 0
i2c_mux 16384 1 lgdt3306a
Signed-off-by: Brad Love <brad@nextdimension.cc>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Use ARRAY_SIZE macro, rather than explicitly coding some variant of it
yourself.
Found with: find -type f -name "*.c" -o -name "*.h" | xargs perl -p -i -e
's/\bsizeof\s*\(\s*(\w+)\s*\)\s*\ /\s*sizeof\s*\(\s*\1\s*\[\s*0\s*\]\s*\)
/ARRAY_SIZE(\1)/g' and manual check/verification.
Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Adds an i2c mux to the lgdt3306a demodulator. This was done to support
the Hauppauge WinTV-dualHD 01595 USB TV tuner (em28xx), which utilizes two
si2157 tuners behind gate control.
Signed-off-by: Kevin Cheng <kcheng@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
These are immutable. Making them "const" allows the compiler to move
them to the "rodata" section.
Note that cxd2841er_t_c_ops cannot be made "const", because
cxd2841er_attach() modifies it. Ouch!
[mchehab@s-opensource.com: fix merge conflicts]
Signed-off-by: Max Kellermann <max.kellermann@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
inside lgdt3306a_search we reading demod status 20 times with 50 msec sleep after each read.
This gives us more than 1 sec of delay. Removing this delay should not affect demod functionality.
Signed-off-by: Abylay Ospan <aospan@netup.ru>
Acked-by: Michael Ira Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Trivial fix to spelling mistake in pr_warn message.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Instead of using the DTV properties cache directly, pass the get
frontend data as an argument. For now, everything should remain
the same, but the next patch will prevent get_frontend to
affect the global cache.
This is needed because several drivers don't care enough to only
change the properties if locked. Due to that, calling
G_PROPERTY before locking on those drivers will make them to
never lock. Ok, those drivers are crap and should never be
merged like that, but the core should not rely that the drivers
would be doing the right thing.
Reviewed-by: Michael Ira Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
The DVB API was originally defined using typedefs. This is against
Kernel CodingStyle, and there's no good usage here. While we can't
remove its usage on userspace, we can avoid its usage in Kernelspace.
So, let's do it.
This patch was generated by this shell script:
for j in $(grep typedef include/uapi/linux/dvb/frontend.h |cut -d' ' -f 3); do for i in $(find drivers/media -name '*.[ch]' -type f) $(find drivers/staging/media -name '*.[ch]' -type f); do sed "s,${j}_t,enum $j," <$i >a && mv a $i; done; done
While here, make CodingStyle fixes on the affected lines.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Stefan Richter <stefanr@s5r6.in-berlin.de> # for drivers/media/firewire/*
Fix a few minor CodingStyle issues at the source code:
- Use proper multi-line comments;
- Align the log tables;
- Remove the .type from dvb_frontend_ops, since this is not
needed anymore (since the drivers conversion to DVBv5);
- Remove emacs format macro.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Ideally, we should be replacing this function by intlog10().
While we don't do that, let's at least constify the tables,
in order to remove its code footfrint, and get rid of nelems.
This also fixes a few 80-cols CodingStyle warnings.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
WARNING: braces {} are not necessary for any arm of this statement
+ if (ret == 0) {
[...]
+ } else {
[...]
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Get rid of the remaining checkpatch.pl warnings:
WARNING: braces {} are not necessary for any arm of this statement
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
The logic there is too complex and it looks like an inifite
loop.
So, simplify the logic and implement it as a for loop.
This gets rid of the following checkpatch.pl warnings:
WARNING: else is not generally useful after a break or return
+ return LG3306_UNLOCK;
+ } else {
WARNING: else is not generally useful after a break or return
+ return LG3306_UNLOCK;
+ } else {
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Use pr_foo() where there's a direct replacement. For debug, use
custom-made macros, for now, as there are 3 different debug levels.
We should get rid of those some day, specially since several such
macros can be just removed, as Kernel trace would provide about
the same output.
This gets rid of some checkpatch errors:
WARNING: Prefer [subsystem eg: netdev]_info([subsystem]dev, ... then dev_info(dev, ... then pr_info(... to printk(KERN_INFO ...
+#define lg_info(fmt, arg...) printk(KERN_INFO "lgdt3306a: " fmt, ##arg)
ERROR: Macros with complex values should be enclosed in parentheses
+#define lg_dbg(fmt, arg...) if (debug & DBG_INFO) \
+ lg_printk(KERN_DEBUG, fmt, ##arg)
ERROR: Macros with complex values should be enclosed in parentheses
+#define lg_reg(fmt, arg...) if (debug & DBG_REG) \
+ lg_printk(KERN_DEBUG, fmt, ##arg)
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Fix this CodingStyle error:
ERROR: Do not include the paragraph about writing to the Free Software Foundation's mailing address from the sample GPL notice. The FSF has changed addresses in the past, and may do so ag$
#56: FILE: drivers/media/dvb-frontends/lgdt3306a.c:19:
+ * along with this program; if not, write to the Free Software$
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Fixes the following smatch errors:
drivers/media/dvb-frontends/lgdt3306a.c: In function 'lgdt3306a_set_if':
drivers/media/dvb-frontends/lgdt3306a.c:695:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
int ret;
^
drivers/media/dvb-frontends/lgdt3306a.c: In function 'lgdt3306a_monitor_vsb':
drivers/media/dvb-frontends/lgdt3306a.c:1033:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
int ret;
^
drivers/media/dvb-frontends/lgdt3306a.c: In function 'lgdt3306a_check_oper_mode':
drivers/media/dvb-frontends/lgdt3306a.c:1082:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
int ret;
^
drivers/media/dvb-frontends/lgdt3306a.c: In function 'lgdt3306a_check_lock_status':
drivers/media/dvb-frontends/lgdt3306a.c:1109:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
int ret;
^
drivers/media/dvb-frontends/lgdt3306a.c: In function 'lgdt3306a_check_neverlock_status':
drivers/media/dvb-frontends/lgdt3306a.c:1185:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
int ret;
^
drivers/media/dvb-frontends/lgdt3306a.c: In function 'lgdt3306a_pre_monitoring':
drivers/media/dvb-frontends/lgdt3306a.c:1199:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
int ret;
^
drivers/media/dvb-frontends/lgdt3306a.c: In function 'lgdt3306a_get_packet_error':
drivers/media/dvb-frontends/lgdt3306a.c:1310:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
int ret;
^
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
As warned by smatch:
drivers/media/dvb-frontends/lgdt3306a.c:1354 log10_x1000() error: buffer overflow 'valx_x10' 14 <= 14
drivers/media/dvb-frontends/lgdt3306a.c:1355 log10_x1000() error: buffer overflow 'log10x_x1000' 14 <= 14
There's a potential of returning a value out of the buffer. Fix it.
While here, remove the ugly braced block.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Simplify the check if CONFIG_DVB_LGDT3306A is enabled, use the
IS_ENABLED() macro, just like the other frontend modules.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
While this is not a mandatory rule at the CodingStyle, we prefer
hexadecimal values in lowercase. Currently, there's a mix of lowercase
and uppercase ons at lgdt3306a. So, convert all to lowercase with this
small script:
perl -ne 'if (m,0x([\dA-F]+),) { $o=$1; $n=lc $1; s,0x($o),0x$n, } print $_'
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Just CodingStyle. No functional changes.
Signed-off-by: Michael Ira Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
fix WARNING: 'supress' may be misspelled - perhaps 'suppress'?
Signed-off-by: Michael Ira Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
We should not be using typedefs at the Kernel, as this makes harder
for reviewers to understand the code.
Signed-off-by: Michael Ira Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Fixes CodingStyle error:
WARNING: EXPORT_SYMBOL(foo); should immediately follow its function/variable.
Signed-off-by: Michael Ira Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
No need for an else, as the previous if will return.
Signed-off-by: Michael Ira Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This ATSC/QAM-B demodulator is used by several new devices.
Add support for it. Other patches will fix CodingStyle issues.
Signed-off-by: Fred Richter <frichter@hauppauge.com>
Signed-off-by: Michael Ira Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Zheyu Ma
Greg Kroah-Hartman
Colin Ian King
Daniel W. S. Almeida
Gustavo A. R. Silva
Brad Love
Thomas Gleixner
Kangjie Lu
zhong jiang
Mauro Carvalho Chehab
Luc Van Oostenryck
Mauro Carvalho Chehab
Thomas Meyer
Kevin Cheng
Max Kellermann
Abylay Ospan
Mauro Carvalho Chehab
Michael Ira Krufky
Fred Richter