| Age | Commit message (Collapse) | Author | Files | Lines |
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On some weird randconfigs, it is possible to select DVB
drivers, without having the DVB_CORE:
CONFIG_DVB_AU8522=m
CONFIG_DVB_AU8522_V4L=m
CONFIG_DVB_TUNER_DIB0090=m
This was never supposed to work, but changeset 22a613e89825
("[media] dvb_frontend: merge duplicate dvb_tuner_ops.release implementations")
caused it to be exposed:
drivers/built-in.o: In function `fc0011_attach':
(.text+0x1598fb): undefined reference to `dvb_tuner_simple_release'
drivers/built-in.o:(.rodata+0x55e58): undefined reference to `dvb_tuner_simple_release'
drivers/built-in.o:(.rodata+0x57398): undefined reference to `dvb_tuner_simple_release'
Fixes: 22a613e89825 ("[media] dvb_frontend: merge duplicate dvb_tuner_ops.release implementations")
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Kernel takes care that interrupts from one source are serialized.
So there's no need to use spinlock_irq_save.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Spinlock nvt_lock is a member of struct nvt_dev and there's no need
to prefix it with nvt_. So remove this prefix.
[mchehab@s-opensource.org: change the prefix also at the open function,
as the patch removing it were not applied (yet?)]
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Using a separate spinlock to protect access to substruct tx of struct
nvt_dev doesn't provide any actual benefit. We can use spinlock
nvt_lock to protect all access to struct nvt_dev and get rid of
nvt->tx.lock.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Member pdev of struct nvt_dev is needed only to access &pdev->dev.
We can get rid of this it by using rdev->dev.parent instead
(both point to the same struct device).
Setting rdev->dev.parent can be removed from the probe function
as this is done by devm_rc_allocate_device now.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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While removing all interfaces in media_device_unregister(), all
media_interface pointers are freed. This is illegal and results in
double kfree() if any media_interface is still linked at this point;
maybe because a userspace process still has a file handle. Once the
process closes the file handle, dvb_media_device_free() gets called,
which frees the dvb_device.intf_devnode again.
This patch removes the unnecessary kfree() call, and documents who's
responsible for really freeing it.
Signed-off-by: Max Kellermann <max.kellermann@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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media_gobj_destroy() may be called twice on one instance - once by
media_device_unregister() and again by dvb_media_device_free(). The
function media_remove_intf_links() establishes and documents the
convention that mdev==NULL means that the object is not registered,
but nobody ever NULLs this variable. So this patch really implements
this behavior, and adds another mdev==NULL check to
media_gobj_destroy() to protect against double removal.
Signed-off-by: Max Kellermann <max.kellermann@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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This commit amends my old commit fe35637b0a9f ("[media] dvb_frontend:
eliminate blocking wait in dvb_unregister_frontend()"), which added
kref to struct dvb_frontend_private. It turned out that there are
several use-after-free bugs left, which affect the struct
dvb_frontend. Protecting it with kref also protects struct
dvb_frontend_private, so we can simply move it.
This is how the use-after-free looks like in KASAN:
BUG: KASAN: use-after-free in string+0x60/0xb1 at addr ffff880033bd9fc0
Read of size 1 by task kworker/0:2/617
CPU: 0 PID: 617 Comm: kworker/0:2 Not tainted 4.8.0-rc1-hosting+ #60
Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
Workqueue: usb_hub_wq hub_event
0000000000000000 ffff880033757218 ffffffff81394e50 ffff880033bd9fd0
ffff880035c03b00 ffff880033757240 ffffffff811f271d ffff880033bd9fc0
1ffff1000677b3f8 ffffed000677b3f8 ffff8800337572b8 ffffffff811f2afe
Call Trace:
[...]
[<ffffffff813a2d2f>] vsnprintf+0x39d/0x7e9
[<ffffffff813993f9>] add_uevent_var+0x10f/0x1dc
[<ffffffff814fe5ca>] rc_dev_uevent+0x55/0x6f
[<ffffffff814438f8>] dev_uevent+0x2e1/0x316
[<ffffffff81399744>] kobject_uevent_env+0x27e/0x701
[<ffffffff81399bd2>] kobject_uevent+0xb/0xd
[<ffffffff81443445>] device_del+0x322/0x383
[<ffffffff81500c0c>] rc_unregister_device+0x98/0xc3
[<ffffffff81508fb4>] dvb_usb_remote_exit+0x7a/0x90
[<ffffffff81506157>] dvb_usb_exit+0x1d/0xe5
[<ffffffff81506e90>] dvb_usb_device_exit+0x69/0x7d
[<ffffffff8150a181>] pctv452e_usb_disconnect+0x7b/0x80
[...]
Object at ffff880033bd9fc0, in cache kmalloc-16 size: 16
Allocated:
[...]
Freed:
PID = 617
[...]
[<ffffffff811f034c>] kfree+0xd9/0x166
[<ffffffff814fe513>] ir_free_table+0x2f/0x51
[<ffffffff81500bc1>] rc_unregister_device+0x4d/0xc3
[<ffffffff81508fb4>] dvb_usb_remote_exit+0x7a/0x90
[<ffffffff81506157>] dvb_usb_exit+0x1d/0xe5
[<ffffffff81506e90>] dvb_usb_device_exit+0x69/0x7d
[<ffffffff8150a181>] pctv452e_usb_disconnect+0x7b/0x80
Another one:
BUG: KASAN: use-after-free in do_sys_poll+0x336/0x6b8 at addr ffff88003563fcc0
Read of size 8 by task tuner on fronte/1042
CPU: 1 PID: 1042 Comm: tuner on fronte Tainted: G B 4.8.0-rc1-hosting+ #60
Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
0000000000000000 ffff88003353f910 ffffffff81394e50 ffff88003563fd80
ffff880035c03200 ffff88003353f938 ffffffff811f271d ffff88003563fc80
1ffff10006ac7f98 ffffed0006ac7f98 ffff88003353f9b0 ffffffff811f2afe
Call Trace:
[...]
[<ffffffff812289b3>] do_sys_poll+0x336/0x6b8
[...]
[<ffffffff81228ed9>] SyS_poll+0xa9/0x194
[...]
Object at ffff88003563fc80, in cache kmalloc-256 size: 256
Allocated:
[...]
Freed:
PID = 617
[...]
[<ffffffff811f034c>] kfree+0xd9/0x166
[<ffffffff814eb60d>] dvb_unregister_device+0xd6/0xe5
[<ffffffff814fa4ed>] dvb_unregister_frontend+0x4b/0x66
[<ffffffff8150810b>] dvb_usb_adapter_frontend_exit+0x69/0xac
[<ffffffff8150617d>] dvb_usb_exit+0x43/0xe5
[<ffffffff81506e90>] dvb_usb_device_exit+0x69/0x7d
[<ffffffff8150a181>] pctv452e_usb_disconnect+0x7b/0x80
Signed-off-by: Max Kellermann <max.kellermann@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Ensure that STB0899_POSTPROC_GPIO_POWER is set synchronously.
Signed-off-by: Max Kellermann <max.kellermann@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Prepare for making "release" asynchronous (via kref). Some operations
may need to be run synchronously in dvb_frontend_detach(), and that's
why we need a "detach" callback.
Signed-off-by: Max Kellermann <max.kellermann@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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This code duplication is confusing and error prone. Let's merge them
by moving the release/dvb_detach call into one function with one
Signed-off-by: Max Kellermann <max.kellermann@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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It is not clear what this return value means. All implemenations
return 0, and the one caller ignores the value. Let's remove this
useless return value completely.
Signed-off-by: Max Kellermann <max.kellermann@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Most release callback functions are identical: free the "tuner_priv"
and clear it. Let's eliminate some bloat by providing this simple
implementation in the dvb_frontend library.
Signed-off-by: Max Kellermann <max.kellermann@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Commit da677fe14364 ("[media] dvb-core/en50221: use kref to manage
struct dvb_ca_private") moved the dvb_unregister_device() call to the
kref callback, but that left lots of stale device state visible to
userspace (e.g. in sysfs). By using dvb_remove_device() and
dvb_free_device() instead of dvb_unregister_device(), we can avoid
that.
Signed-off-by: Max Kellermann <max.kellermann@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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dvb_unregister_device() has a major problem: it combines unregistering
with memory disposal. Sometimes, it is necessary to unregister a
device, but no memory can be freed yet, because a process still has a
(stale) file handle. Therefore, we need to split
dvb_unregister_device(). This will allow sanitizing a few callers.
With my new design, dvb_unregister_device() appears misnamed, but to
reduce patch noise, I'm not renaming it just yet.
Signed-off-by: Max Kellermann <max.kellermann@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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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>
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rc_unregister_device() will first call ir_free_table(), and later
device_del(); however, the latter causes a call to rc_dev_uevent(),
which prints rc_map.name, which at this point has already bee freed.
This fixes a use-after-free bug found with KASAN.
As reported by Shuah:
"I am seeing the following when I do rmmod on au0828
BUG: KASAN: use-after-free in string+0x170/0x1f0 at addr ffff8801bd513000
Read of size 1 by task rmmod/1831
CPU: 1 PID: 1831 Comm: rmmod Tainted: G W 4.9.0-rc5 #5
Hardware name: Hewlett-Packard HP ProBook 6475b/180F, BIOS 68TTU Ver. F.04 08/03/2012
ffff8801aea2f680 ffffffff81b37ad3 ffff8801fa403b80 ffff8801bd513000
ffff8801aea2f6a8 ffffffff8156c301 ffff8801aea2f738 ffff8801bd513000
ffff8801fa403b80 ffff8801aea2f728 ffffffff8156c59a ffff8801aea2f770
Call Trace:
dump_stack+0x67/0x94
[<ffffffff8156c301>] kasan_object_err+0x21/0x70
[<ffffffff8156c59a>] kasan_report_error+0x1fa/0x4d0
[<ffffffffa116f05f>] ? au0828_exit+0x10/0x21 [au0828]
[<ffffffff8156c8b3>] __asan_report_load1_noabort+0x43/0x50
[<ffffffff81b58b20>] ? string+0x170/0x1f0
[<ffffffff81b58b20>] string+0x170/0x1f0
[<ffffffff81b621c4>] vsnprintf+0x374/0x1c50
[<ffffffff81b61e50>] ? pointer+0xa80/0xa80
[<ffffffff8156b676>] ? save_stack+0x46/0xd0
[<ffffffff81566faa>] ? __kmalloc+0x14a/0x2a0
[<ffffffff81b3d70a>] ? kobject_get_path+0x9a/0x200
[<ffffffff81b408c2>] ? kobject_uevent_env+0x282/0xca0
[<ffffffff81b412eb>] ? kobject_uevent+0xb/0x10
[<ffffffff81f10104>] ? device_del+0x434/0x6d0
[<ffffffffa0fea717>] ? rc_unregister_device+0x177/0x240 [rc_core]
[<ffffffffa116eeb0>] ? au0828_rc_unregister+0x60/0xb0 [au0828]
The problem is fixed with this patch on Linux 4.9-rc4"
Signed-off-by: Max Kellermann <max.kellermann@gmail.com>
Tested-by: Shuah Khan <shuahkh@osg.samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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It should call of_node_put on non-null poiner.
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Acked-by: Benoit Parrot <bparrot@ti.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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devm_pinctrl_get() can fail so we should check for that.
Fixes: 0a6824bc10de ('[media] v4l2: blackfin: select proper pinctrl state in ppi_set_params if CONFIG_PINCTRL is enabled')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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There is no need to check for CONFIG_COMPAT and consequently
assign the compat_ioctl.
Signed-off-by: Andi Shyti <andi.shyti@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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When saa7134 module driving a Medion 7134 card is reloaded reads of this
card EEPROM (required for automatic detection of tuner model) will be
corrupted due to I2C gate in DVB-T demod being left closed.
This sometimes also happens on first saa7134 module load after a warm
reboot.
Fix this by opening this I2C gate before doing EEPROM read during i2c
initialization.
Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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This patch fix streaming issue for Geniatech T230/PT360.
Signed-off-by: CrazyCat <crazycat69@narod.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Now that CLK_PROC_STFE is defined as a critical clock in
DT, we can remove the commented clk_disable_unprepare from
the c8sectpfe driver. This means we now have balanced
clk*enable/disable calls in the driver, but on STiH407
family the clock in reality will never actually be disabled.
This is due to a HW bug where once the IP has been configured
and the SLIM core is running, disabling the clock causes a
unrecoverable bus lockup.
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Acked-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Removes the superfluous statement about writing to the FSF in the GPL
notice
Signed-off-by: Jean-Baptiste Abbadie <jb@abbadie.fr>
Acked-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Align multiple lines statement with parentheses
Signed-off-by: Jean-Baptiste Abbadie <jb@abbadie.fr>
Acked-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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This replaces the S_* style permissions by numbers for the __ATTR macros
Signed-off-by: Jean-Baptiste Abbadie <jb@abbadie.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Document the interface between the CSI-2 transmitter and receiver drivers.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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A multiplication for the size determination of a memory allocation
indicated that an array data structure should be processed.
Thus use the corresponding function "kmalloc_array".
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: David Härdeman <david@hardeman.nu>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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redrat3_init_rc_dev()
Return directly after a call of the function "rc_allocate_device" failed
at the beginning.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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redrat3_init_rc_dev()
The local variable "ret" will be set to an appropriate value a bit later.
Thus omit the explicit initialisation at the beginning.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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redrat3_get_firmware_rev()
The local variable "rc" will be set to an appropriate value a bit later.
Thus omit the explicit initialisation at the beginning.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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redrat3_transmit_ir()
* Return directly after a call of the function "kcalloc" failed
at the beginning.
* Reorder two calls for the function "kfree" at the end.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Replace the specification of a data type by a pointer dereference
as the parameter for the operator "sizeof" to make the corresponding size
determination a bit safer.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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The script "checkpatch.pl" pointed information out like the following.
WARNING: Possible unnecessary 'out of memory' message
Thus remove such a logging statement in five functions.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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* Multiplications for the size determination of memory allocations
indicated that array data structures should be processed.
Thus use the corresponding function "kcalloc".
This issue was detected by using the Coccinelle software.
* Replace the specification of data types by pointer dereferences
to make the corresponding size determination a bit safer according to
the Linux coding style convention.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Unfortunately, the callers of tveeprom don't do the right
thing to initialize the device. So, it produces log messages
like:
[ 267.533010] (null): Hauppauge model 42012, rev C186, serial# 2819348
[ 267.533012] (null): tuner model is Philips FQ1236 MK3 (idx 86, type 43)
[ 267.533013] (null): TV standards NTSC(M) (eeprom 0x08)
[ 267.533014] (null): audio processor is MSP3445 (idx 12)
[ 267.533015] (null): has radio
So, replace it to pr_foo(), as it should work fine.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Instead of calling printk() directly, use pr_foo() macro.
That should make the rc_core messages be formatted with the
right prefix.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Unfortunately, KERN_CONT doesn't work with dev_foo(),
producing weird messages like:
tvp5150 6-005c: tvp5150: read 0xf6 = 0xff
ff
So, we need to get rid of it.
As we're always printing read/write in hexa when dumping
multiple register values, also remove the "0x" from the
read/write debug messages too.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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When returning results via v4l2_subdev_core_ops.log_status,
use dev_foo() call, instead of just calling printk()
directly, without even specifying the log message level.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Instead of using v4l_foo(), use the dev_foo() macros, as
most modern media drivers.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Instead of using pr_foo(), use dev_foo(), with provides a
better output. As this device is a multi-interface one,
we'll set the device name to show the chipset and the driver
used.
While here, get rid of printk continuation messages.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Instead of using the v4l_foo() macros, just use the
kernel-wide dev_foo() macros, as there's no good reason
to use something else.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Drivers using dev_foo() macro should not use KERN_CONT, as, internally,
those macros work as if all strings were terminated by a \n. So, doing:
dev_info(&client->dev, "%s ", client->name);
printk(KERN_CONT "supports radio, mode is autodetect and autoselect");
Would produce the following output:
msp3400 6-0044: msp3400
supports radio, mode is autodetect and autoselect
As there's no good reason to use KERN_CONT, let's rewrite the code
to avoid that, allowing this driver to be converted to dev_foo().
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Currently, there's a mess at the V4L2 printk macros: some drivers
use their own macros, others use pr_foo() or v4l_foo() macros,
while more modern drivers use dev_foo() macros.
The best is to get rid of v4l_foo() macros, as they can be
replaced by either dev_foo() or pr_foo(). Yet, such change can
be disruptive, as dev_foo() cannot use KERN_CONT. So, the best
is to do such change driver by driver.
There are replacements for most v4l_foo() macros, but it lacks
a way to enable debug messages per level. So, add such macro,
in order to make the conversion easier.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Tuner core uses its own printk internal macros, instead of the
standard debug ones, for no good reason.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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The dvb-usb system has its own macro to print hexa dumps
(debug_dump). Such macro doesn't support messages with
KERN_CONT after commit 563873318d32 ("Merge branch 'printk-cleanups'").
So, let's get rid of a printk() that would be assuming that
this would work.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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The dprintk() macro relies on continuation lines. This is not
a good practice and will break after commit 563873318d32
("Merge branch 'printk-cleanups'").
So, instead of directly calling printk(), use pr_foo() macros,
adding a \n leading char on each macro call.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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The dprintk() macro relies on continuation lines. This is not
a good practice and will break after commit 563873318d32
("Merge branch 'printk-cleanups'").
So, instead of directly calling printk(), use pr_foo() macros,
adding a\n leading char on each macro call.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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The dprintk() macro relies on continuation lines. This is not
a good practice and will break after commit 563873318d32
("Merge branch 'printk-cleanups'").
So, instead of directly calling printk(), use pr_foo() macros,
adding a\n leading char on each macro call.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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The dprintk() macro relies on continuation lines. This is not
a good practice and will break after commit 563873318d32
("Merge branch 'printk-cleanups'").
So, instead of directly calling printk(), use pr_foo() macros,
adding a \n leading char on each macro call.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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