Since when we start discussions about the usage Media Controller for
complex hardware, one thing become clear: the way it is, MC fails to
map anything different than capture/output/m2m video-only streaming.
The point is that MC has entities named as devnodes, but the only
devnode used (before the DVB patches) is MEDIA_ENT_T_DEVNODE_V4L.
Due to the way MC got implemented, however, this entity actually
doesn't represent the devnode, but the hardware I/O engine that
receives data via DMA.
By coincidence, such DMA is associated with the V4L device node
on webcam hardware, but this is not true even for other V4L2
devices. For example, on USB hardware, the DMA is done via the
USB controller. The data passes though a in-kernel filter that
strips off the URB headers. Other V4L2 devices like radio may not
even have DMA. When it have, the DMA is done via ALSA, and not
via the V4L devnode.
In other words, MC is broken as a whole, but tagging it as BROKEN
right now would do more harm than good.
So, instead, let's mark, for now, the DVB part as broken and
block all new changes to MC while we fix this mess, whith
we hopefully will do for the next Kernel version.
Requested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull crypto fixes from Herbert Xu:
"This fixes the following issues:
- Crash in caam hash due to uninitialised buffer lengths.
- Alignment issue in caam RNG that may lead to non-random output"
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: caam - fix RNG buffer cache alignment
crypto: caam - improve initalization for context state saves
This patch fixes a number of problems in crypto driver Kconfig
entries:
1. Select BLKCIPHER instead of BLKCIPHER2. The latter is internal
and should not be used outside of the crypto API itself.
2. Do not select ALGAPI unless you use a legacy type like
CRYPTO_ALG_TYPE_CIPHER.
3. Select the algorithm type that you are implementing, e.g., AEAD.
4. Do not select generic C code such as CBC/ECB unless you use them
as a fallback.
5. Remove default n since that is the default default.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The patch
crypto: caam - Add definition of rd/wr_reg64 for little endian platform
added support for little endian platforms to the CAAM driver. Namely a
write and read function for 64 bit registers.
The only user of this functions is the Job Ring driver (drivers/crypto/caam/jr.c).
It uses the functions to set the DMA addresses for the input/output rings.
However, at least in the default configuration, the least significant 32 bits are
always in the base+0x0004 address; independent of the endianness of the bytes itself.
That means the addresses do not change with the system endianness.
DMA addresses are only 32 bits wide on non-64-bit systems, writing the upper 32 bits
of this value to the register for the least significant bits results in the DMA address
being set to 0.
Fix this by always writing the registers in the same way.
Suggested-by: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
It appears that, at some point last year, XFS made directory handling
changes which bring it into lockdep conflict with shmem_zero_setup():
it is surprising that mmap() can clone an inode while holding mmap_sem,
but that has been so for many years.
Since those few lockdep traces that I've seen all implicated selinux,
I'm hoping that we can use the __shmem_file_setup(,,,S_PRIVATE) which
v3.13's commit c727709092 ("security: shmem: implement kernel private
shmem inodes") introduced to avoid LSM checks on kernel-internal inodes:
the mmap("/dev/zero") cloned inode is indeed a kernel-internal detail.
This also covers the !CONFIG_SHMEM use of ramfs to support /dev/zero
(and MAP_SHARED|MAP_ANONYMOUS). I thought there were also drivers
which cloned inode in mmap(), but if so, I cannot locate them now.
Reported-and-tested-by: Prarit Bhargava <prarit@redhat.com>
Reported-and-tested-by: Daniel Wagner <wagi@monom.org>
Reported-and-tested-by: Morten Stevens <mstevens@fedoraproject.org>
Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The pciehp debug logging is overly verbose and often redundant. Almost all
of the information printed by dbg_ctrl() is also printed by the normal PCI
core enumeration code and by pcie_init().
Remove the redundant debug info.
When claiming a pciehp bridge, we print the slot characteristics, e.g.,
Slot #6 AttnBtn- AttnInd- PwrInd- PwrCtrl- MRL- Interlock- NoCompl+ LLActRep+
Add the Hot-Plug Capable and Hot-Plug Surprise bits to this information,
and print it all in the same order as lspci does.
No functional change except the message text changes.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Rajat Jain <rajatja@google.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
We enable _CRS on all systems from 2008 and later. On older systems, we
ignore _CRS and assume the whole physical address space (excluding RAM and
other devices) is available for PCI devices, but on systems that support
physical address spaces larger than 4GB, it's doubtful that the area above
4GB is really available for PCI.
After d56dbf5bab ("PCI: Allocate 64-bit BARs above 4G when possible"), we
try to use that space above 4GB *first*, so we're more likely to put a
device there.
On Juan's Toshiba Satellite Pro U200, BIOS left the graphics, sound, 1394,
and card reader devices unassigned (but only after Windows had been
booted). Only the sound device had a 64-bit BAR, so it was the only device
placed above 4GB, and hence the only device that didn't work.
Keep _CRS enabled even on pre-2008 systems if they support physical address
space larger than 4GB.
Fixes: d56dbf5bab ("PCI: Allocate 64-bit BARs above 4G when possible")
Reported-and-tested-by: Juan Dayer <jdayer@outlook.com>
Reported-and-tested-by: Alan Horsfield <alan@hazelgarth.co.uk>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=99221
Link: https://bugzilla.opensuse.org/show_bug.cgi?id=907092
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: stable@vger.kernel.org # v3.14+
Now it is possible to press CTRL+z at anytime and that will disable the
events being monitored, essentially turning 'top' into 'report', with
pressing CTRL+z again making it enable the events again, returning to
the 'top' behaviour, i.e. dynamic + decaying of older samples.
One may want, for instance, play with:
-d, --delay <n> number of seconds to delay between refreshes
and:
-z, --zero zero history across updates
Plus CTRL+z to see only the events since last zeroing, etc.
Suggested-by: Ingo Molnar <mingo@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-zq7tnh5462blt2yda0bcxh5b@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
For an upcoming feature in 'perf top' we will have a hotkey to
enable/disable events, so remember if the events in the list are
enabled or disabled and allows toggling this state using a new
method.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-64c4jvdl5feg2zhimxvokqka@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
I get following crash on multiple systems and across several releases
(at least since v3.18).
Core was generated by `/tmp/perf trace sleep 0.2 '.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 perf_mmap__read_head (mm=0x3fff9bf30070) at util/evlist.h:195
195 u64 head = ACCESS_ONCE(pc->data_head);
(gdb) bt
#0 perf_mmap__read_head (mm=0x3fff9bf30070) at util/evlist.h:195
#1 perf_evlist__mmap_read (evlist=0x10027f11910, idx=<optimized out>)
at util/evlist.c:637
#2 0x000000001003ce4c in trace__run (argv=<optimized out>,
argc=<optimized out>, trace=0x3fffd7b28288) at builtin-trace.c:2259
#3 cmd_trace (argc=<optimized out>, argv=<optimized out>,
prefix=<optimized out>) at builtin-trace.c:2799
#4 0x00000000100657b8 in run_builtin (p=0x10176798 <commands+480>, argc=3,
argv=0x3fffd7b2b550) at perf.c:370
#5 0x00000000100063e8 in handle_internal_command (argv=0x3fffd7b2b550, argc=3)
at perf.c:429
#6 run_argv (argv=0x3fffd7b2af70, argcp=0x3fffd7b2af7c) at perf.c:473
#7 main (argc=3, argv=0x3fffd7b2b550) at perf.c:588
The problem seems to be a race condition, when the application has just
exited. Some/all fds associated with the perf-events (tracepoints) go
into a POLLHUP/ POLLERR state and the mmap region associated with those
events are unmapped (in perf_evlist__filter_pollfd()).
But we go back and do a perf_evlist__mmap_read() which assumes that the
mmaps are still valid and we hit the crash.
If the mapping for an event is released, its refcnt is 0 (and ->base
is NULL), so ensure we have non-zero refcount before accessing the map.
Note that perf-record has a similar logic but unlike perf-trace, the
record__mmap_read_all() checks the evlist->mmap[i].base before accessing
the map.
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Li Zhang <zhlcindy@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/20150612060003.GA19913@us.ibm.com
[ Fixed it up to use atomic_read() ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Speed up the "perf probe --list" by caching the last used debuginfo.
perf probe --list always open and load debuginfo for each entry of probe
list. This takes very a long time.
E.g. with vfs_* events (total 96 probes)
[root@localhost perf]# time ./perf probe -l &> /dev/null
real 0m25.376s
user 0m24.381s
sys 0m1.012s
To solve this issue, this adds debuginfo_cache to cache the
last used debuginfo on memory.
With this fix, the perf-probe --list significantly improves
its speed.
[root@localhost perf]# time ./perf probe -l &> /dev/null
real 0m0.161s
user 0m0.136s
sys 0m0.025s
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Naohiro Aota <naota@elisp.net>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20150617145854.19715.15314.stgit@localhost.localdomain
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
When the last part of converted events are blacklisted or out-of-text,
those are skipped and perf probe doesn't show usage examples. This
fixes it to show the example even if the last part of event list is
skipped.
E.g. without this patch, events are added, but suddenly end:
# perf probe vfs_*
vfs_caches_init_early is out of .text, skip it.
vfs_caches_init is out of .text, skip it.
Added new events:
probe:vfs_fallocate (on vfs_*)
probe:vfs_open (on vfs_*)
...
probe:vfs_dentry_acceptable (on vfs_*)
probe:vfs_load_quota_inode (on vfs_*)
#
With this fix:
# perf probe vfs_*
vfs_caches_init_early is out of .text, skip it.
vfs_caches_init is out of .text, skip it.
Added new events:
probe:vfs_fallocate (on vfs_*)
...
probe:vfs_load_quota_inode (on vfs_*)
You can now use it in all perf tools, such as:
perf record -e probe:vfs_load_quota_inode -aR sleep 1
Note that this can be reproduced ONLY IF the vfs_caches_init* is the
last part of matched symbol list. I've checked this happens on
"3.19.0-generic #18-Ubuntu" kernel binary.
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Naohiro Aota <naota@elisp.net>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20150616115057.19906.5502.stgit@localhost.localdomain
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Commit e3d09ec812 ("tools lib traceevent:
Export dynamic symbols used by traceevent plugins") adds libtraceevent
dynamic list directly into LDFLAGS, which makes all targets depend on
that list through LDFLAGS.
This is not good since some of targets like libgtk.so doesn't use plugin
at all, but require the existance of that list because of linker
options.
This patch isolates the -Xlink option into LIBTRACEEVENT_DYNAMIC_LIST_LDFLAGS,
makes only perf and perf.so use it.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: He Kuang <hekuang@huawei.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1434552389-89144-1-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Following error occurs when trying to use 'perf report' on x86_64 to
cross analysis a perf.data generated by an old perf on a big-endian
machine:
# perf report
*** Error in `/home/w00229757/perf': free(): invalid next size (fast): 0x00000000032c99f0 ***
======= Backtrace: =========
/lib64/libc.so.6(+0x6eeef)[0x7ff6ff7e2eef]
/lib64/libc.so.6(+0x78cae)[0x7ff6ff7eccae]
/lib64/libc.so.6(+0x79987)[0x7ff6ff7ed987]
/path/to/perf[0x4ac734]
/path/to/perf[0x4ac829]
/path/to/perf(perf_header__process_sections+0x129)[0x4ad2c9]
/path/to/perf(perf_session__read_header+0x2e1)[0x4ad9e1]
/path/to/perf(perf_session__new+0x168)[0x4bd458]
/path/to/perf(cmd_report+0xfa0)[0x43eb70]
/path/to/perf[0x47adc3]
/path/to/perf(main+0x5f6)[0x42fd06]
/lib64/libc.so.6(__libc_start_main+0xf5)[0x7ff6ff795bd5]
/path/to/perf[0x42fe35]
======= Memory map: ========
[SNIP]
The bug is in perf_event__attr_swap(). It swaps all fields in 'struct
perf_event_attr' without checking whether the swapped field exist or
not. In addition, in read_event_desc() allocs memory for attr according
to size read from perf.data.
Therefore, if the perf.data is collected by an old perf (without
aux_watermark, for example), when perf_event__attr_swap() swaping
attr->aux_watermark it destroy malloc's metadata.
This patch introduces boundary checking in perf_event__attr_swap(). It
adds macros bswap_field_64 and bswap_field_32 into
perf_event__attr_swap() to make it only swap exist fields.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1434534999-85347-1-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Commit fcfd6611fb ("tools build: Add
detected config support") dynamically creates .config-detected. Add it
to .gitignore.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Zefan Li <lizefan@huawei.com>
Link: http://lkml.kernel.org/r/1434542358-5430-1-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
At the moment when HDMI video output is stopped, we just clear the
enable bit and return. While it's unclear if this can cause any issues,
I think it's still better to wait for FRAMEDONE interrupt after clearing
the enable bit so that we're sure the HDMI IP has finished.
As we don't have any ready-made irq handling for HDMI, and this only
needs to be done when disabling the HDMI output, this patch implements a
simple loop with sleep, polling the FRAMEDONE bit.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Error handling in hdmi_power_on_full() is not correct, and could leave
resources unfreed.
Fix this by arranging the error labels correctly.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
The current driver does both x and y decimation on OMAP3 DSS. Testing
shows that x decimation rarely works, leading to underflows.
The exact reason for this is unclear, as the underflows seem to happen
even with low pixel clock rates, and I would presume that if the DSS can
manage a display with 140MHz pixel clock, it could manage x decimation
with factor 2 with a low pixel clock (~30MHz).
So it is possible that there is a problem somewhere else, in memory
management, or DSS DMA, or similar. I have not found anything that would
help this.
So, to fix the downscaling scaling, this patch removes x decimation for
OMAP3. This will limit some of the more demanding downscaling scenarios,
but one could argue that using DSS to downscale such a large amount is
insane in the first place, as the produced image is rather bad quality.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
The DISPC's scaling code seems to presume that decimation always
succeeds, and so we always do find a suitable downscaling setup.
However, this is not the case, and the algorithm can fail.
When that happens, the code just proceeds with wrong results, causing
issues later.
Add the necessary checks to bail out if the scaling algorithm failed.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
The DISPC driver uses 64 bit arithmetic to calculate the required clock
rate for scaling. The code does not seem to work correctly, and instead
calculates with 32 bit numbers, giving wrong result.
Fix the code by typecasting values to u64 first, so that the
calculations do happen in 64 bits.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
pixel_inc and row_inc work differently on OMAP2/3 and OMAP4+ DSS. On
OMAP2/3 DSS, the pixel_inc is _not_ added by the HW at the end of the
line, after the last pixel, whereas on OMAP4+ it is.
The driver currently works for OMAP4+, but does not handle OMAP2/3
correctly, which leads to tilted image when row_inc is used.
This patch adds a flag to DISPC driver so that the pixel_inc is added
when required.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
On OMAP3/AM43xx some scaling factors cause underflows/synclosts. After
studying this, I found that sometimes the driver uses three-tap scaling
with downscaling factor smaller than x0.5. This causes issues, as x0.5
is the limit for three-tap scaling.
The driver has FEAT_PARAM_DOWNSCALE parameter, but that seems to be for
five-tap scaling, which allows scaling down to x0.25.
This patch adds checks for both horizontal and vertical scaling. For
horizontal the HW always uses 5 taps, so the limit is x0.25.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
After calculating the required decimation for scaling, the dispc driver
checks once more if the resulting configuration is valid by calling
check_horiz_timing_omap3().
Earlier calls to this function have correctly used in_width and
in_height as parameters, but the last call uses width and height. This
causes the driver to possibly reject scaling that would work.
This patch fixes the parameters.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
DISPC needs even input buffer width for YUV modes. The DISPC driver
doesn't check this at the moment (although omapdrm does), but worse,
when DISPC driver does x predecimation the result may be uneven. This
causes sometimes sync losts, underflows, or just visual errors.
This patch makes DISPC driver return an error if the user gives uneven
input width for a YUV buffer. It also makes the input width even in case
of predecimation.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Errata i631 description:
"When in YUV4:2:0 format in 1D burst, the DISPC DMA skips lines when
fetching Chroma sampling."
Workaround:
"If YUV4:2:0-1D burst is required: Set
DISPC_VIDp_ATTRIBUTES[22]DOUBLESTRIDE to 0x0 and
DISPC_VIDp_ATTRIBUTES[13:12]ROTATION to 0x1 or 0x3"
The description is somewhat confusing, but testing has shown that DSS
fetches extra rows from memory when using NV12 format in 1D mode. If the
memory after the framebuffer is inaccessible, this leads to OCP errors.
The driver always uses DOUBLESTRIDE=0 when using 1D mode, so we only
need to handle the ROTATION part.
The issue exist on all OMAP4 and OMAP5 based DSS IPs.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
I copied the wrong shell code into the documentation. Sorry to all who
tried to get sense out of this current example :/ Slight rewording while
we are here.
Reported-by: Tim Bakker <bakkert@mymail.vcu.edu>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@kernel.org
When the following filter is used it causes a warning to trigger:
# cd /sys/kernel/debug/tracing
# echo "((dev==1)blocks==2)" > events/ext4/ext4_truncate_exit/filter
-bash: echo: write error: Invalid argument
# cat events/ext4/ext4_truncate_exit/filter
((dev==1)blocks==2)
^
parse_error: No error
------------[ cut here ]------------
WARNING: CPU: 2 PID: 1223 at kernel/trace/trace_events_filter.c:1640 replace_preds+0x3c5/0x990()
Modules linked in: bnep lockd grace bluetooth ...
CPU: 3 PID: 1223 Comm: bash Tainted: G W 4.1.0-rc3-test+ #450
Hardware name: Hewlett-Packard HP Compaq Pro 6300 SFF/339A, BIOS K01 v02.05 05/07/2012
0000000000000668 ffff8800c106bc98 ffffffff816ed4f9 ffff88011ead0cf0
0000000000000000 ffff8800c106bcd8 ffffffff8107fb07 ffffffff8136b46c
ffff8800c7d81d48 ffff8800d4c2bc00 ffff8800d4d4f920 00000000ffffffea
Call Trace:
[<ffffffff816ed4f9>] dump_stack+0x4c/0x6e
[<ffffffff8107fb07>] warn_slowpath_common+0x97/0xe0
[<ffffffff8136b46c>] ? _kstrtoull+0x2c/0x80
[<ffffffff8107fb6a>] warn_slowpath_null+0x1a/0x20
[<ffffffff81159065>] replace_preds+0x3c5/0x990
[<ffffffff811596b2>] create_filter+0x82/0xb0
[<ffffffff81159944>] apply_event_filter+0xd4/0x180
[<ffffffff81152bbf>] event_filter_write+0x8f/0x120
[<ffffffff811db2a8>] __vfs_write+0x28/0xe0
[<ffffffff811dda43>] ? __sb_start_write+0x53/0xf0
[<ffffffff812e51e0>] ? security_file_permission+0x30/0xc0
[<ffffffff811dc408>] vfs_write+0xb8/0x1b0
[<ffffffff811dc72f>] SyS_write+0x4f/0xb0
[<ffffffff816f5217>] system_call_fastpath+0x12/0x6a
---[ end trace e11028bd95818dcd ]---
Worse yet, reading the error message (the filter again) it says that
there was no error, when there clearly was. The issue is that the
code that checks the input does not check for balanced ops. That is,
having an op between a closed parenthesis and the next token.
This would only cause a warning, and fail out before doing any real
harm, but it should still not caues a warning, and the error reported
should work:
# cd /sys/kernel/debug/tracing
# echo "((dev==1)blocks==2)" > events/ext4/ext4_truncate_exit/filter
-bash: echo: write error: Invalid argument
# cat events/ext4/ext4_truncate_exit/filter
((dev==1)blocks==2)
^
parse_error: Meaningless filter expression
And give no kernel warning.
Link: http://lkml.kernel.org/r/20150615175025.7e809215@gandalf.local.home
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: stable@vger.kernel.org # 2.6.31+
Reported-by: Vince Weaver <vincent.weaver@maine.edu>
Tested-by: Vince Weaver <vincent.weaver@maine.edu>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Now that we are using components in omapdss, there's no need for
separate handling of dss and dispc driver init. Thus we can move the dss
and dispc init and unit func pointers to the lists we use for the other
dss submodules.
We can now also handle errors returned by the registration functions
properly: if registering a driver fails, we can stop processing and
return the error.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
omapdss kernel module contains drivers for multiple devices, one for
each DSS submodule. The probing we have at the moment is a mess, and
doesn't give us proper deferred probing nor ensure that all the devices
are probed before omapfb/omapdrm start using omapdss.
This patch solves the mess by using the component system for DSS
submodules.
The changes to all DSS submodules (dispc, dpi, dsi, hdmi4/5, rfbi, sdi,
venc) are the same: probe & remove functions are changed to bind &
unbind, and new probe & remove functions are added which call
component_add/del.
The dss_core driver (dss.c) acts as a component master. Adding and
matching the components is simple: all dss device's child devices are
added as components.
However, we do have some dependencies between the drivers. The order in
which they should be probed is reflected by the list in core.c
(dss_output_drv_reg_funcs). The drivers are registered in that order,
which causes the components to be added in that order, which makes the
components to be bound in that order. This feels a bit fragile, and we
probably should improve the code to manage binds in random order.
However, for now, this works fine.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
We have a list of function pointers to dss submodule uninit functions.
It makes sense to do the uninit in the reverse order to init, but that
is not currently the case.
This patch reorders the uninit calls to be the reverse of init order.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
The following patches will add component handling to omapdss, improving
the handling of deferred probing. However, at the moment we're using
quite a lot of __inits and __exits in the driver, which prevent normal
dynamic probing and removal.
This patch removes most of the uses of __init and __exit, so that we can
register drivers after module init, and so that we can unregister
drivers even if the module is built-in.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
The return value of dss_init_ports() is not handled at all, causing
crashes later if the call failed.
This patch adds the error handling, and we also move the call to a
slightly earlier place to make bailing out easier.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Refactor dss probe function by extracting the setup for video plls into
a separate function. The call to this function is also moved to a
slightly earlier phase, so that in error case we can bail out more
easily.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
We have a flag, 'dss_initialized', which tells omapfb and omapdrm if
omapdss is available. At the moment it can be set even if the dss
submodules are not all ready, in case something gets deferred.
Move the flag to dss_core driver so that it'll signal the availability
of the dss drivers move accurately.
For now, it'll signal that dss_core is ready, which is not quite correct
but still better than previously. The following patches will add
component system to omapdss, and after those patches 'dss_initialized'
will signal that all the submodules are ready.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Add a new rsa generic SW implementation.
This implements only cryptographic primitives.
Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
Added select on ASN1.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Add Public Key Encryption API.
Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
Made CRYPTO_AKCIPHER invisible like other type config options.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The Poly1305 authenticator requires a unique key for each generated tag. This
implies that we can't set the key per tfm, as multiple users set individual
keys. Instead we pass a desc specific key as the first two blocks of the
message to authenticate in update().
Signed-off-by: Martin Willi <martin@strongswan.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This reverts commit 9b9f9296a7b73fbafe0a0a6f2494eaadd97f9f73 as
all in-kernel implementations of GCM have been converted to the
new AEAD interface, meaning that they should now pass the updated
rfc4543 test.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This patch converts the caam GCM implementations to the new AEAD
interface. This is compile-tested only.
Note that all IV generation for GCM algorithms have been removed.
The reason is that the current generation uses purely random IVs
which is not appropriate for counter-based algorithms where we
first and foremost require uniqueness.
Of course there is no reason why you couldn't implement seqiv or
seqniv within caam since all they do is xor the sequence number
with a salt, but since I can't test this on actual hardware I'll
leave it alone for now.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Currently dma_map_sg_chained does not handle errors from the
underlying dma_map_sg calls. This patch adds rollback in case
of an error by simply calling dma_unmap_sg_chained for the ones
that we've already mapped.
All current callers ignore the return value so this should have
no impact on them.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This patch converts the nx GCM implementations to the new AEAD
interface. This is compile-tested only.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This patch updates the rfc4543 test vectors to the new format
where the IV is part of the AD. For now these vectors are still
unused. They will be reactivated once all rfc4543 implementations
have migrated.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
