The current mainline crashes when hitting userspace with the following:
kernel BUG at kernel/auditsc.c:1769!
cpu 0x1: Vector: 700 (Program Check) at [c000000023883a60]
pc: c0000000001047a8: .__audit_syscall_entry+0x38/0x130
lr: c00000000000ed64: .do_syscall_trace_enter+0xc4/0x270
sp: c000000023883ce0
msr: 8000000000029032
current = 0xc000000023800000
paca = 0xc00000000f080380 softe: 0 irq_happened: 0x01
pid = 1629, comm = start_udev
kernel BUG at kernel/auditsc.c:1769!
enter ? for help
[c000000023883d80] c00000000000ed64 .do_syscall_trace_enter+0xc4/0x270
[c000000023883e30] c000000000009b08 syscall_dotrace+0xc/0x38
--- Exception: c00 (System Call) at 0000008010ec50dc
Bisecting found the following patch caused it:
commit 44e9309f1f
Author: Haren Myneni <haren@linux.vnet.ibm.com>
powerpc: Implement PPR save/restore
It was found this patch corrupted r9 when calling
SET_DEFAULT_THREAD_PPR()
Using r10 as a scratch register instead of r9 solved the problem.
Signed-off-by: Alistair Popple <alistair@popple.id.au>
Acked-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
It's not used, and it can be retrieved via cgrp->root->top_cgroup.
Signed-off-by: Li Zefan <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Adding a new remoteproc driver for OMAP-L13x DSP
Signed-off-by: Robert Tivy <rtivy@ti.com>
[removed 'EXPERIMENTAL' and fixed some indentation issues]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Change virtqueue callback function rpmsg_recv_done() to process all
available messages instead of just one message.
Signed-off-by: Robert Tivy <rtivy@ti.com>
[split _recv function instead of adding indentation]
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Add da850 EHRPWM & ECAP DT node along with pin-mux details.
Also adds OF_DEV_AUXDATA for EHRPWM & ECAP driver to use EHRPWM & ECAP
clock.
Signed-off-by: Philip Avinash <avinashphilip@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Returning EMFILE (process has too many open files) is incorrect to
indicate a port is already open by another process. Use EBUSY for that.
This does change what we report to userspace, but I believe userspace
can look at it this way: it gets EBUSY, a new error code, instead of
EMFILE. It's still an error, and that's not changing.
Reported-by: Mateusz Guzik <mguzik@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We don't export any symbols > 128 characters, but if we did then
kallsyms_expand_symbol() would overflow the buffer handed to it.
So we need check destination buffer length when copying.
the related test:
if we define an EXPORT function which name more than 128.
will panic when call kallsyms_lookup_name by init_kprobes on booting.
after check the length (provide this patch), it is ok.
Implementaion:
add additional destination buffer length parameter (maxlen)
if uncompressed string is too long (>= maxlen), it will be truncated.
not check the parameters whether valid, since it is a static function.
Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
list_for_each_entry is able to handle empty lists just fine, there is no need
to make sure that the list is non empty.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
In of_dma_controller_register() routine we are calling of_get_property() as an
parameter to be32_to_cpup(). In case the property doesn't exist we will get a
crash.
This patch changes this code to check if we got a valid property first and then
runs be32_to_cpup() on it.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
No DMA of-function alters the name, so this patch changes the name arguments
to be constant. Most drivers will probably request DMA channels using a
constant name.
Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
The alignment workaround is only necessary for cb3.2 or earlier platforms.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Dan Williams <djbw@fb.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
The PQ Val ops work on the newer hardware so we should actually provide support
for it and remove the disabling bits.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Dan Williams <djbw@fb.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Make it so only 3.2 and earlier platform need the PCI config register
clearings since this implementation does not have the registers.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Dan Williams <djbw@fb.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
The Intel Atom S1200 family ioatdma changed the channel reset behavior.
It does a reset similar to PCI FLR by resetting all the MSIX
registers. We have to re-init msix interrupts because of this. This
workaround is only specific to this platform and is not expected to carry
over to the later generations.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Dan Williams <djbw@fb.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
The channel status register for v3.3 is now 64bit. Use readq if available
on v3.3 platforms.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Dan Williams <djbw@fb.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
These should be good for the IOAT DMA devices on the Intel Atom S1269,
S1279, and S1289 platforms. We are also adding IOAT v3.3 definition for
the new DMA engine.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Dan Williams <djbw@fb.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Adding Haswell PCI device IDs for ioatdma and simplify the detection of
certain Xeon CPUs that has alignment bugs so that modifications can be
changed at a single place going forward.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Dan Williams <djbw@fb.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
If the device-tree blob is present during boot, then register the SDMA
controller with the device-tree DMA driver so that we can use device-tree
to look-up DMA client information.
Signed-off-by: Jon Hunter <jon-hunter@ti.com>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
If CONFIG_OF is not set the of_node of the device will always be NULL.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
The patch to add the common DMA binding added a dummy dw_dma_slave
structure into the dw_dma_chan structure in order to configure the
masters correctly. It turns out that this can be simplified if we
pick the DMA masters in the dwc_alloc_chan_resources function instead
and save them in the dw_dma_chan structure directly.
This could be simplified further once all users that today use
dw_dma_slave for configuration get converted to device tree based
setup instead.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: linux-arm-kernel@lists.infradead.org
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Since we will have not only DT cases in future let's rename DT related methods
to reflect their belonging.
The rename was done as follows:
struct dw_dma_filter_args -> struct dw_dma_of_filter_args
dw_dma_generic_filter() -> dw_dma_of_filter()
dw_dma_xlate() -> dw_dma_of_xlate()
dw_dma_id_table -> dw_dma_of_id_table
There is no functional change.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Let's use capital letter as a first one in the comments.
There is no functional changes.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
The 'mask' parameter is not modified in __dma_request_channel and really
shouldn't be. Make this explicit by making the parameter const.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
there is hardcode which enabled the clock of dmaengine before,
this patch takes the clock by standard clock API and enable it
in probe.
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
When we pause the channel after transfer is completed we might stuck in the
dwc_chan_pause() because the FIFO_EMPTY flag will never be asserted. To avoid
the endless loop we introduce a timeout here (*). The proper solution is to
somehow get the residue in FIFO and avoid busyloop when transfer is done, but
this task is not simple and fast.
Unfortunately we can't use cpu_relax() in conjunction with jiffies checker, due
to we have interrupts disabled by spin_lock_irqsave() and there is a big chance
that no interrupts will come to update the jiffies..
(*) The worst case is
AHB write * FIFO size / hclk = 5.12 us,
where
AHB write = 2 cycles,
hclk = 100 MHz,
burst size = 1 byte,
FIFO size = 256 bytes.
The proposed 40us timeout might be considered as a big one, though we enter
to that state only when we have the transfer already completed.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Since commit 84c1e63c12 (dma: Remove erroneous __exit and __exit_p() references)
the following section mismatch happens:
WARNING: drivers/built-in.o(.text+0x20f94): Section mismatch in reference from the function ipu_remove() to the function .exit.text:ipu_idmac_exit()
The function ipu_remove() references a function in an exit section.
Often the function ipu_idmac_exit() has valid usage outside the exit section
and the fix is to remove the __exit annotation of ipu_idmac_exit.
Remove the '__exit' annotation from ipu_idmac_exit in order to fix it.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Maxin B. John <maxin.john@enea.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Tegra only supports, and always enables, device tree. Remove all ifdefs
and runtime checks for DT support from the driver.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Use the newly introduced devm_ioremap_resource() instead of
devm_request_and_ioremap() which provides more consistent error handling.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Reviewed-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Comparison between buffers is stored to the dedicated structure.
Note that the verify result is now accessible only via file 'results' in the
debugfs.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
The patch provides a storage for the test results in the linked list. The
gathered data could be used after test is done.
The new file 'results' represents gathered data of the in progress test. The
messages collected are printed to the kernel log as well.
Example of output:
% cat /sys/kernel/debug/dmatest/results
dma0chan0-copy0: #1: No errors with src_off=0x7bf dst_off=0x8ad len=0x3fea (0)
The message format is unified across the different types of errors. A number in
the parens represents additional information, e.g. error code, error counter,
or status.
Note that the buffer comparison is done in the old way, i.e. data is not
collected and just printed out.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Its meaning is to limit amount of error messages to be printed out when buffer
mismatch is occured.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
The following command should return actual state of the test.
% cat /sys/kernel/debug/dmatest/run
To wait for test done the user may perform a busy loop that checks the state.
% while [ $(cat /sys/kernel/debug/dmatest/run) = "Y" ]
> do
> echo -n "."
> sleep 1
> done
> echo
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Instead of doing
modprobe dmatest ...
modprobe -r dmatest
we allow user to run tests interactively.
The dmatest could be built as module or inside kernel. Let's consider those
cases.
1. When dmatest is built as a module...
After mounting debugfs and loading the module, the /sys/kernel/debug/dmatest
folder with nodes will be created. They are the same as module parameters with
addition of the 'run' node that controls run and stop phases of the test.
Note that in this case test will not run on load automatically.
Example of usage:
% echo dma0chan0 > /sys/kernel/debug/dmatest/channel
% echo 2000 > /sys/kernel/debug/dmatest/timeout
% echo 1 > /sys/kernel/debug/dmatest/iterations
% echo 1 > /sys/kernel/debug/dmatest/run
After a while you will start to get messages about current status or error like
in the original code.
Note that running a new test will stop any in progress test.
2. When built-in in the kernel...
The module parameters that is supplied to the kernel command line will be used
for the first performed test. After user gets a control, the test could be
interrupted or re-run with same or different parameters. For the details see
the above section "1. When dmatest is built as a module..."
In both cases the module parameters are used as initial values for the test case.
You always could check them at run-time by running
% grep -H . /sys/module/dmatest/parameters/*
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Better to keep test parameters separate from internal variables.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
We don't need to have them global and later we would like to protect access to
them as well.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
The proposed change will remove usage of the module parameters as global
variables. In future it helps to run different test cases sequentially.
The patch introduces the run_threaded_test() and stop_threaded_test() functions
that could be used later outside of dmatest_init, dmatest_exit scope.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This will help in future to hide a global variable usage.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
If user have the timeout alike issues and wants to cancel the thread
immediately, the current call of wait_event_freezable_timeout is preventing to
this until timeout is expired. Thus, user will experience the unnecessary
delays.
Adding kthread_should_stop() check inside wait_event_freezable_timeout() solves
that.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Looks like only the RAID channels are allowed to have irq coalescing support
in the existing code. Fixing that. The ioat3 cleanup code can handle memcpy
ops anyways
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Dan Williams <djbw@fb.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Making OP field a hex instead of integer to make it more readable. Also add
the dump out of the NEXT field.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Dan Williams <djbw@fb.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Removing the annotation with __exit and referencing with __exit_p()
present in dma driver module remove hooks.
Part of the __devexit and __devexit_p() purge.
Signed-off-by: Maxin B. John <maxin.john@enea.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Fix this compiler warning:
warning: 'td_remove' defined but not used [-Wunused-function]
Signed-off-by: Maxin B. John <maxin.john@enea.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
pdc_desc_get() is called from pd_prep_slave_sg, and the function is
called from interrupt context(e.g. Uart driver "pch_uart.c").
In fact, I saw kernel error message.
So, GFP_ATOMIC must be used not GFP_NOIO.
Signed-off-by: Tomoya MORINAGA <tomoya.rohm@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Fix the logic to allow mc programming of second transfer after first
has been done, by removing immediate return upon success and iterating
until we detect QFull or DMAC dying.
Reported-by: Alvaro Moran <dirac3000@gmail.com>
Tested-by: Alvaro Moran <dirac3000@gmail.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
- Fix a timer problem that causes missed ticks and hangs.
- Fix a problem with the decompressor UART dropping characters.
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Merge tag 'msm-fix-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/davidb/linux-msm into next/fixes-non-critical
From David Brown:
Some minor fixes for MSM for 3.10
- Fix a timer problem that causes missed ticks and hangs.
- Fix a problem with the decompressor UART dropping characters.
* tag 'msm-fix-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/davidb/linux-msm:
ARM: msm: Fix uncompess.h tx underrun check
ARM: msm: Stop counting before reprogramming clockevent
Signed-off-by: Olof Johansson <olof@lixom.net>
The msm_defconfig is quite out of date. This allows the targets we
are actively working on to be more easily build and run tested.
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Merge tag 'msm-defconfig-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/davidb/linux-msm into next/boards
From David Brown:
Defconfig updates for MSM
The msm_defconfig is quite out of date. This allows the targets we
are actively working on to be more easily build and run tested.
* tag 'msm-defconfig-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/davidb/linux-msm:
ARM: msm: enable SSBI driver in defconfig
ARM: msm: Concentrate defconfig on DT supported devices
These patches are changes to the MSM timer code that will be for
upcoming targets, including a generalization of the binding and
preventing a missing timer interrupt.
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Merge tag 'msm-core-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/davidb/linux-msm into next/soc
From David Brown:
Patches for MSM core
These patches are changes to the MSM timer code that will be for
upcoming targets, including a generalization of the binding and
preventing a missing timer interrupt.
* tag 'msm-core-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/davidb/linux-msm:
ARM: msm: Wait for timer clear to complete
ARM: msm: Rework timer binding to be more general
Signed-off-by: Olof Johansson <olof@lixom.net>
These are some patches for various parts of MSM that gradually bring
us closer to being part of single zimage.
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Merge tag 'msm-cleanup-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/davidb/linux-msm into next/cleanup
From David Brown:
Cleanups for MSM for 3.10
These are some patches for various parts of MSM that gradually bring
us closer to being part of single zimage.
* tag 'msm-cleanup-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/davidb/linux-msm:
ARM: msm: Remove unused cpu.h header file
gpio: Make gpio-msm-v1 into a platform driver
mmc: msm_sdcc: Remove unnecessary include
ARM: msm: Move dma.h #defines that are private to dma.c
Signed-off-by: Olof Johansson <olof@lixom.net>
With this patch, the socfpga clk driver is able to query the clock and clock
rates appropriately.
Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
Reviewed-by: Pavel Machek <pavel@denx.de>
Signed-off-by: Olof Johansson <olof@lixom.net>
