media: ngene: Fix out-of-bounds bug in ngene_command_config_free_buf()

Fix an 11-year old bug in ngene_command_config_free_buf() while
addressing the following warnings caught with -Warray-bounds:

arch/alpha/include/asm/string.h:22:16: warning: '__builtin_memcpy' offset [12, 16] from the object at 'com' is out of the bounds of referenced subobject 'config' with type 'unsigned char' at offset 10 [-Warray-bounds]
arch/x86/include/asm/string_32.h:182:25: warning: '__builtin_memcpy' offset [12, 16] from the object at 'com' is out of the bounds of referenced subobject 'config' with type 'unsigned char' at offset 10 [-Warray-bounds]

The problem is that the original code is trying to copy 6 bytes of
data into a one-byte size member _config_ of the wrong structue
FW_CONFIGURE_BUFFERS, in a single call to memcpy(). This causes a
legitimate compiler warning because memcpy() overruns the length
of &com.cmd.ConfigureBuffers.config. It seems that the right
structure is FW_CONFIGURE_FREE_BUFFERS, instead, because it contains
6 more members apart from the header _hdr_. Also, the name of
the function ngene_command_config_free_buf() suggests that the actual
intention is to ConfigureFreeBuffers, instead of ConfigureBuffers
(which takes place in the function ngene_command_config_buf(), above).

Fix this by enclosing those 6 members of struct FW_CONFIGURE_FREE_BUFFERS
into new struct config, and use &com.cmd.ConfigureFreeBuffers.config as
the destination address, instead of &com.cmd.ConfigureBuffers.config,
when calling memcpy().

This also helps with the ongoing efforts to globally enable
-Warray-bounds and get us closer to being able to tighten the
FORTIFY_SOURCE routines on memcpy().

Link: https://github.com/KSPP/linux/issues/109
Fixes: dae52d009fc9 ("V4L/DVB: ngene: Initial check-in")
Cc: stable@vger.kernel.org
Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/linux-hardening/20210420001631.GA45456@embeddedor/

media: ngene: switch from 'pci_' to 'dma_' API

The wrappers in include/linux/pci-dma-compat.h should go away.

The patch has been generated with the coccinelle script below and has been
hand modified to replace GFP_ with a correct flag.
It has been compile tested.

When memory is allocated, GFP_KERNEL can be used because in all cases,
it is called from a probe function and no lock is taken in the between.

The call chain is:
ngene_probe (probe function, used in ngene-cards.c)
--> ngene_get_buffers
--> AllocCommonBuffers (call dma_alloc_coherent)
--> create_ring_buffer (call dma_alloc_coherent)
--> AllocateRingBuffers (call dma_alloc_coherent)

@@
@@
- PCI_DMA_BIDIRECTIONAL
+ DMA_BIDIRECTIONAL

@@
@@
- PCI_DMA_TODEVICE
+ DMA_TO_DEVICE

@@
@@
- PCI_DMA_FROMDEVICE
+ DMA_FROM_DEVICE

@@
@@
- PCI_DMA_NONE
+ DMA_NONE

@@
expression e1, e2, e3;
@@
- pci_alloc_consistent(e1, e2, e3)
+ dma_alloc_coherent(&e1->dev, e2, e3, GFP_)

@@
expression e1, e2, e3;
@@
- pci_zalloc_consistent(e1, e2, e3)
+ dma_alloc_coherent(&e1->dev, e2, e3, GFP_)

@@
expression e1, e2, e3, e4;
@@
- pci_free_consistent(e1, e2, e3, e4)
+ dma_free_coherent(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
- pci_map_single(e1, e2, e3, e4)
+ dma_map_single(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
- pci_unmap_single(e1, e2, e3, e4)
+ dma_unmap_single(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4, e5;
@@
- pci_map_page(e1, e2, e3, e4, e5)
+ dma_map_page(&e1->dev, e2, e3, e4, e5)

@@
expression e1, e2, e3, e4;
@@
- pci_unmap_page(e1, e2, e3, e4)
+ dma_unmap_page(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
- pci_map_sg(e1, e2, e3, e4)
+ dma_map_sg(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
- pci_unmap_sg(e1, e2, e3, e4)
+ dma_unmap_sg(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
- pci_dma_sync_single_for_cpu(e1, e2, e3, e4)
+ dma_sync_single_for_cpu(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
- pci_dma_sync_single_for_device(e1, e2, e3, e4)
+ dma_sync_single_for_device(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
- pci_dma_sync_sg_for_cpu(e1, e2, e3, e4)
+ dma_sync_sg_for_cpu(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
- pci_dma_sync_sg_for_device(e1, e2, e3, e4)
+ dma_sync_sg_for_device(&e1->dev, e2, e3, e4)

@@
expression e1, e2;
@@
- pci_dma_mapping_error(e1, e2)
+ dma_mapping_error(&e1->dev, e2)

@@
expression e1, e2;
@@
- pci_set_dma_mask(e1, e2)
+ dma_set_mask(&e1->dev, e2)

@@
expression e1, e2;
@@
- pci_set_consistent_dma_mask(e1, e2)
+ dma_set_coherent_mask(&e1->dev, e2)

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ngene: convert tasklets to use new tasklet_setup() API

In preparation for unconditionally passing the
struct tasklet_struct pointer to all tasklet
callbacks, switch to using the new tasklet_setup()
and from_tasklet() to pass the tasklet pointer explicitly.

Signed-off-by: Romain Perier <romain.perier@gmail.com>
Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

media: ngene: Remove call to memset after pci_alloc_consistent

pci_alloc_consistent calls dma_alloc_coherent directly.
In commit 518a2f1925c3
("dma-mapping: zero memory returned from dma_alloc_*"),
dma_alloc_coherent has already zeroed the memory.
So memset is not needed.

Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 461

Based on 1 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 version 2 only
as published by the free software foundation 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 to obtain the license point your browser to http
www gnu org copyleft gpl html

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-only

has been chosen to replace the boilerplate/reference in 12 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Enrico Weigelt <info@metux.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081202.028166291@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

media: pci: fix several typos

Use codespell to fix lots of typos over frontends.

Manually verified to avoid false-positives.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

media: ngene: avoid unused variable warning

The newly added pdev variable is only used in an #ifdef, causing a
build warning without CONFIG_PCI_MSI, unless we move the declaration
inside the same #ifdef:

drivers/media/pci/ngene/ngene-core.c: In function 'ngene_start':
drivers/media/pci/ngene/ngene-core.c:1328:17: error: unused variable 'pdev' [-Werror=unused-variable]

Fixes: 6795bf626482 ("media: ngene: convert kernellog printing from printk() to dev_*() macros")

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Daniel Scheller <d.scheller@gmx.net>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: ngene: use common DVB I2C client handling helpers

Like in ddbridge, get rid of all duplicated I2C client handling constructs
and rather make use of the newly added dvb_module_*() helpers. Makes
things more clean and removes the (cosmetic) need for some variables.

The check on a valid ptr on ci->en isn't really needed since the cxd2099
driver will set it at a time where it is going to return successfully
from probing.

Signed-off-by: Daniel Scheller <d.scheller@gmx.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: ngene: check for CXD2099AR presence before attaching

Currently, if there's no CXD2099AR attached to any expansion connector of
the ngene hardware, it will complain with this on every module load:

cxd2099 1-0040: No CXD2099AR detected at 0x40
cxd2099: probe of 1-0040 failed with error -5
ngene 0000:02:00.0: CXD2099AR attach failed

This happens due to the logic assuming such hardware is always there and
blindly tries to attach the cxd2099 I2C driver. Rather add a probe
function (in ngene-cards.c with a prototype in ngene.h) to check for
the existence of such hardware before probing, and don't try further if
no CXD2099 was found.

Signed-off-by: Daniel Scheller <d.scheller@gmx.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: ngene: support STV0367 DVB-C/T DuoFlex addons

Add support for STV0367+TDA18212 based DuoFlex CT addon modules. For this,
add a demod probe function and all necessary demod/tuner attach functions
which use existing auxiliary drivers (stv0367 and tda18212) to support
this hardware. As tda18212 is an I2C client driver, proper cleanup code
is added to the deregistration sequence in ngene-core. To not cause use-
after-free situations when there's a CXD2099 I2C client connected, which
is rather freed in ngene-core.c:cxd_detach(), add i2c_client_fe to struct
ngene_channel to keep track if the i2c_client was allocated by a frontend
driver, rather than the CI code paths. Also move the I2C access functions
to the top of the file and add the required read_regs() function for the
tda18212 ping to work.

This adds autoselection (if MEDIA_SUBDRV_AUTOSELECT) of the STV0367 demod
driver and TDA18212 tuner driver to Kconfig aswell.

Signed-off-by: Daniel Scheller <d.scheller@gmx.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: ngene: convert kernellog printing from printk() to dev_*() macros

Convert all printk() and pr_*() kernel log printing to rather use the
dev_*() macros. Not only is it discouraged to use printk() (checkpatch
even complains about that), but also this helps identifying the exact PCI
device for any printed event, and it makes almost all printing shorter
in terms of code style since there's no need to use KERN_* DEVICE_NAME
any more (dev_*() will take care of this).

Since the dprintk macro define isn't used anymore, remove it.

Signed-off-by: Daniel Scheller <d.scheller@gmx.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: ngene: adapt cxd2099 attach to the new i2c_client way

Change the way the cxd2099 hardware is being attached to the new I2C
client interface way.

Signed-off-by: Daniel Scheller <d.scheller@gmx.net>
Signed-off-by: Jasmin Jessich <jasmin@anw.at>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: ngene: Replace semaphore i2c_switch_mutex with mutex

The semaphore 'i2c_switch_mutex' is used as a simple mutex, so
it should be written as one. Semaphores are going away in the future.

Signed-off-by: Binoy Jayan <binoy.jayan@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: ngene: Replace semaphore stream_mutex with mutex

The semaphore 'stream_mutex' is used as a simple mutex, so
it should be written as one. Also moving the mutex_[lock/unlock]
to the caller as it is anyway locked at the beginning of the
callee thus avoiding repetition.

Signed-off-by: Binoy Jayan <binoy.jayan@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

media: ngene: Replace semaphore cmd_mutex with mutex

The semaphore 'cmd_mutex' is used as a simple mutex, so
it should be written as one. Also, replace down with
mutex_destroy to ensure sane state when ngene_stop is
called.

Signed-off-by: Binoy Jayan <binoy.jayan@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

[media] media: Drop FSF's postal address from the source code files

Drop the FSF's postal address from the source code files that typically
contain mostly the license text. Of the 628 removed instances, 578 are
outdated.

The patch has been created with the following command without manual edits:

git grep -l "675 Mass Ave\|59 Temple Place\|51 Franklin St" -- \
drivers/media/ include/media|while read i; do i=$i perl -e '
open(F,"< $ENV{i}");
$a=join("", <F>);
$a =~ s/[ \t]*\*\n.*You should.*\n.*along with.*\n.*(\n.*USA.*$)?\n//m
&& $a =~ s/(^.*)Or, (point your browser to) /$1To obtain the license, $2\n$1/m;
close(F);
open(F, "> $ENV{i}");
print F $a;
close(F);'; done

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>

[media] dvb: modify core to implement interfaces/entities at MC new gen

The Media Controller New Generation redefines the types for both
interfaces and entities to be used on DVB. Make the needed
changes at the DVB core for all interfaces, entities and
data and interface links to appear in the graph.

Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

[media] ngene: preventing dereferencing a NULL pointer

As reported by smatch:
drivers/media/pci/ngene/ngene-core.c:1529 init_channel() error: we previously assumed 'chan->fe' could be null (see line 1521)

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

[media] ngene: fix sparse warnings

drivers/media/pci/ngene/ngene-core.c:188:27: warning: incorrect type in argument 1 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:190:25: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:199:9: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:260:9: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:263:9: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:282:32: warning: incorrect type in argument 1 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:283:17: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:284:17: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:285:17: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:286:17: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:287:17: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:288:17: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:292:17: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:293:17: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:294:17: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:295:17: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:296:17: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:297:17: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:303:17: warning: incorrect type in argument 1 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:316:9: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:368:17: warning: incorrect type in argument 1 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:372:9: warning: incorrect type in argument 1 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:1160:28: warning: incorrect type in argument 1 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:1199:20: warning: incorrect type in assignment (different address spaces)
drivers/media/pci/ngene/ngene-core.c:1213:30: warning: incorrect type in argument 1 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:1214:30: warning: incorrect type in argument 1 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:1223:9: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:1225:24: warning: incorrect type in argument 1 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:1227:31: warning: incorrect type in argument 1 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:1296:9: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:1297:9: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:1298:9: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:1299:9: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:1300:9: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:1301:9: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:1302:9: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:1363:9: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:1365:9: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:1376:17: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:1391:17: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-core.c:1596:18: warning: Using plain integer as NULL pointer
drivers/media/pci/ngene/ngene-core.c:1615:9: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-cards.c:699:29: warning: Using plain integer as NULL pointer
drivers/media/pci/ngene/ngene-cards.c:699:32: warning: Using plain integer as NULL pointer
drivers/media/pci/ngene/ngene-cards.c:699:35: warning: Using plain integer as NULL pointer
drivers/media/pci/ngene/ngene-cards.c:699:38: warning: Using plain integer as NULL pointer
drivers/media/pci/ngene/ngene-dvb.c:84:59: warning: incorrect type in argument 2 (different address spaces)
drivers/media/pci/ngene/ngene-dvb.c:93:20: warning: incorrect type in initializer (incompatible argument 2 (different address spaces))
drivers/media/pci/ngene/ngene-dvb.c:94:20: warning: incorrect type in initializer (incompatible argument 2 (different address spaces))
drivers/media/pci/ngene/ngene-dvb.c:100:20: warning: Using plain integer as NULL pointer

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

media: use pci_zalloc_consistent

Remove the now unnecessary memset too.

Signed-off-by: Joe Perches <joe@perches.com>
Cc: Hans Verkuil <hverkuil@xs4all.nl>
Cc: Mauro Carvalho Chehab <m.chehab@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

[media] drivers/media: Remove useless return variables

This patch remove variables that are initialized with a constant,
are never updated, and are only used as parameter of return.
Return the constant instead of using a variable.

Verified by compilation only.

The coccinelle script that find and fixes this issue is:
// <smpl>
@@
type T;
constant C;
identifier ret;
@@
- T ret = C;
... when != ret
when strict
return
- ret
+ C
;
// </smpl>

Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

[media] ngene: Remove casting the return value which is a void pointer

Casting the return value which is a void pointer is redundant.
The conversion from void pointer to any other pointer type is
guaranteed by the C programming language.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

[media] pci: ngene: Remove redundant pci_set_drvdata

Driver core sets driver data to NULL upon failure or remove.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

Drivers: media: remove __dev* attributes.

CONFIG_HOTPLUG is going away as an option. As a result, the __dev*
markings need to be removed.

This change removes the use of __devinit, __devexit_p, __devinitdata,
__devinitconst, and __devexit from these drivers.

Based on patches originally written by Bill Pemberton, but redone by me
in order to handle some of the coding style issues better, by hand.

Cc: Bill Pemberton <wfp5p@virginia.edu>
Cc: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

[media] drivers/media/pci/ngene/ngene-core.c: fix error return code

Convert a nonnegative error return code to a negative one, as returned
elsewhere in the function.
A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
(
if@p1 (\(ret < 0\|ret != 0\))
{ ... return ret; }
|
ret@p1 = 0
)
... when != ret = e1
when != &ret
*if(...)
{
... when != ret = e2
when forall
return ret;
}
// </smpl>

Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

[media] ngene: better comment unused code to avoid warnings

get rid of a few warnings about empty body:
drivers/media/pci/ngene/ngene-core.c:756:3: warning: suggest braces around empty body in an 'else' statement [-Wempty-body]
drivers/media/pci/ngene/ngene-cards.c:429:5: warning: suggest braces around empty body in an 'if' statement [-Wempty-body]
Those are due to some commented code.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

[media] Rename media/dvb as media/pci

The remaining dvb drivers are pci, so rename them to match the
bus.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>