VCNL4000, VCNL4010 and VCNL4020 chips are fairly compatible from a software
point of view, added features are not yet supported by the driver
patch adds a check for the product ID and demotes the corresponding
dev_info() to dev_dbg()
Signed-off-by: Peter Meerwald-Stadler <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Add initial driver support for MAX6675, and MAX31855 thermocouple chips.
Cc: Marek Vasut <marex@denx.de>
Cc: Matt Porter <mporter@konsulko.com>
Signed-off-by: Matt Ranostay <mranostay@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
There are several notes for this DTV property. Some are
outdated, so take some care of it, making it updated.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
A confgifs attribute's show() callback is called once the first time
the user attempts to read from it. If it returns an error, that
error is returned to the user. However, the open file's
buffer_needs_fill is still set to zero and consecutive read() calls
will find an empty buffer that doesn't need filling and return 0 to
the user. This could give the user the wrong impression that the
attribute was read successfully.
Fix this by not setting buffer_needs_fill if show() returns an error,
making consecutive read() calls call show() again and either get an
error again or get data.
Signed-off-by: Tal Shorer <tal.shorer@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This matches what is already done for prepare_exit_to_usermode(),
and saves about 60 clock cycles (4% speedup) with the benchmark
in the previous commit message.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kvm@vger.kernel.org
Link: http://lkml.kernel.org/r/1466434712-31440-3-git-send-email-pbonzini@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Thanks to all the work that was done by Andy Lutomirski and others,
enter_from_user_mode() and prepare_exit_to_usermode() are now called only with
interrupts disabled. Let's provide them a version of user_enter()/user_exit()
that skips saving and restoring the interrupt flag.
On an AMD-based machine I tested this patch on, with force-enabled
context tracking, the speed-up in system calls was 90 clock cycles or 6%,
measured with the following simple benchmark:
#include <sys/signal.h>
#include <time.h>
#include <unistd.h>
#include <stdio.h>
unsigned long rdtsc()
{
unsigned long result;
asm volatile("rdtsc; shl $32, %%rdx; mov %%eax, %%eax\n"
"or %%rdx, %%rax" : "=a" (result) : : "rdx");
return result;
}
int main()
{
unsigned long tsc1, tsc2;
int pid = getpid();
int i;
tsc1 = rdtsc();
for (i = 0; i < 100000000; i++)
kill(pid, SIGWINCH);
tsc2 = rdtsc();
printf("%ld\n", tsc2 - tsc1);
}
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kvm@vger.kernel.org
Link: http://lkml.kernel.org/r/1466434712-31440-2-git-send-email-pbonzini@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Unfortunately, captions are new on Sphinx for c blocks: it was
added only on version 1.3. Also, it were already bad enough
not being able to auto-numerate them.
So, let's give up and use, instead, titles before the examples.
Not much is lost, and, as a side track, we don't need to
numerate them anymore.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Now that the LIRC header was added, we can cross-reference it
and identify the documentation gaps.
There are lots of stuff missing there, but at least now we
can avoid the gap to increase.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Just like the other parts of the document, let's add the LIRC
header, as it is part of the API.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
The lirc syscall documentation uses a very different and
simplified way than the rest of the media book. make it
closer. Still, there's just one page for all ioctls.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Some files start with an upper letter. Also, they have big
names. rename them.
No functional changes.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
There's no need to say: Table of Contents there. Also, this
generates a duplicated caption xref. So, remove, to use the
same format on every part.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Just like the other parts of the media book, group the MC
functions together on one chapter.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Intel MID platforms are using explicitly defined regulators.
Let the regulator core know that we do not have any additional
regulators left. This lets it substitute unprovided regulators with
dummy ones.
Without this change when CONFIG_REGULATOR=y the USB driver fails on getting
"vbus" regulator and SDHCI can't get "vmmc" and "vqmmc" regulators either.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1468071929-77383-1-git-send-email-andriy.shevchenko@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Sometimes, we want to do a partial build, instead of building
everything. However, right now, if one wants to build just
Sphinx books, it will build also the DocBooks.
Add an option to allow to ignore all DocBooks when building
documentation.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
In stm_unlock(), the test to determine whether we've fully unlocked the
flash checks for the lock length to be equal to the flash size. That is
a typo/think-o -- the condition actually means the flash is completely
*locked.* We should be using the inverse condition -- that the lock
length is 0 (i.e., no protection).
The result of this bug is that we never actually turn off the Status
Register Write Disable bit, even if the flash is completely unlocked.
Now we can.
Fixes: 47b8edbf0d ("mtd: spi-nor: disallow further writes to SR if WP# is low")
Reported-by: Giorgio <giorgio.nicole@arcor.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
This function compiles to 2554 bytes of machine code.
In C, the function is almost 200 lines long.
It has only one callsite, but forced inlining that much code
makes gcc generate significantly worse code. Let gcc itself decide
what to do.
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
CC: David Woodhouse <David.Woodhouse@intel.com>
CC: Dan Carpenter <dan.carpenter@oracle.com>
CC: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
CC: linux-mtd@lists.infradead.org
CC: linux-kernel@vger.kernel.org
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Replace if condition and BUG() with a BUG_ON having the conditional
expression of the if statement as argument.
The Coccinelle semantic patch used to make this change is as follows:
@@ expression E,f; @@
(
if (<+... f(...) ...+>) { BUG(); }
|
- if (E) { BUG(); }
+ BUG_ON(E);
)
Signed-off-by: Amitoj Kaur Chawla <amitoj1606@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
drivers/mtd/maps/physmap_of.c: In function ‘of_flash_probe’:
drivers/mtd/maps/physmap_of.c:165:16: warning: variable ‘p’ set but not used [-Wunused-but-set-variable]
This could be a problem if the 'reg' property is not set, since that
means 'count' will be uninitialized.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
The "tmp_retlen" variable can be uninitialized if action() fails. It's
harmless except for the static checker warning. I have moved the error
handling earlier to fix it.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This has been unused, except as the condition for a fatal error, since
commit c13cbf3b50 ("[MTD] mtdram: Quick cleanup of the driver:") in
2.6.13 (!).
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Make it possible to protect all pages holding image data during
hibernate image restoration by setting them read-only (so as to
catch attempts to write to those pages after image data have been
stored in them).
This adds overhead to image restoration code (it may cause large
page mappings to be split as a result of page flags changes) and
the errors it protects against should never happen in theory, so
the feature is only active after passing hibernate=protect_image
to the command line of the restore kernel.
Also it only is built if CONFIG_DEBUG_RODATA is set.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
One branch of an if/else statement in __register_nosave_region() is
formatted against the kernel coding style which causes the code to
look slightly odd. To fix that, add missing braces to it.
No functional changes.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Many comments in kernel/power/snapshot.c do not follow the general
comment formatting rules. They look odd, some of them are outdated
too, some are hard to parse and generally difficult to understand.
Clean them up to make them easier to comprehend.
No functional changes.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The formatting of some function headers in kernel/power/snapshot.c
is not consistent with the general kernel coding style and with the
formatting of some other function headers in the same file.
Make all of them follow the same formatting convention.
No functional changes.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Make hibernate_setup() follow the coding style more closely by adding
some missing braces to the if () statement in it.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
In the prep work I did before enabling BH while handling socket backlog,
I missed two points in DCCP :
1) dccp_v4_ctl_send_reset() uses bh_lock_sock(), assuming BH were
blocked. It is not anymore always true.
2) dccp_v4_route_skb() was using __IP_INC_STATS() instead of
IP_INC_STATS()
A similar fix was done for TCP, in commit 47dcc20a39
("ipv4: tcp: ip_send_unicast_reply() is not BH safe")
Fixes: 7309f8821f ("dccp: do not assume DCCP code is non preemptible")
Fixes: 5413d1babe ("net: do not block BH while processing socket backlog")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
All inet6_netconf_notify_devconf() callers are in process context,
so we can use GFP_KERNEL allocations if we take care of not holding
a rwlock while not needed in ip6mr (we hold RTNL there)
Fixes: d67b8c616b ("netconf: advertise mc_forwarding status")
Fixes: f3a1bfb11c ("rtnl/ipv6: use netconf msg to advertise forwarding status")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
inet_forward_change() runs with RTNL held.
We are allowed to sleep if required.
If we use __in_dev_get_rtnl() instead of __in_dev_get_rcu(),
we no longer have to use GFP_ATOMIC allocations in
inet_netconf_notify_devconf(), meaning we are less likely to miss
notifications under memory pressure, and wont touch precious memory
reserves either and risk dropping incoming packets.
inet_netconf_get_devconf() can also use GFP_KERNEL allocation.
Fixes: edc9e74893 ("rtnl/ipv4: use netconf msg to advertise forwarding status")
Fixes: 9e5511106f ("rtnl/ipv4: add support of RTM_GETNETCONF")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jon Mason says:
====================
net: ethernet: bgmac: Add platform device support
David Miller, Please consider including patches 1-5 in net-next
Florian Fainelli, Please consider including patches 6 & 7 in
devicetree/next
Changes in v2:
* Made device tree binding changes suggested by Sergei Shtylyov,
Ray Jui, Rob Herring, Florian Fainelli, and Arnd Bergmann
* Removed devm_* error paths in the bgmac_platform.c suggested by
Florian Fainelli
* Added Arnd Bergmann's Acked-by to the first 5 (there were changes
outlined in the bullets above, but I believe them to be minor enough
for him to not revoke his acks)
This patch series adds support for other, non-bcma iProc SoC's to the
bgmac driver. This series only adds NSP support, but we are interested
in adding support for the Cygnus and NS2 families (with more possible
down the road).
To support non-bcma enabled SoCs, we need to add the standard device
tree "platform device" support. Unfortunately, this driver is very
tighly coupled with the bcma bus and much unwinding is needed. I tried
to break this up into a number of patches to make it more obvious what
was being done to add platform device support. I was able to verify
that the bcma code still works using a 53012K board (NS SoC), and that
the platform code works using a 58625K board (NSP SoC).
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
The bcma portion of the driver has been split off into a bcma specific
driver. This has been mirrored for the platform driver. The last
references to the bcma core struct have been changed into a generic
function call. These function calls are wrappers to either the original
bcma code or new platform functions that access the same areas via MMIO.
This necessitated adding function pointers for both platform and bcma to
hide which backend is being used from the generic bgmac code.
Signed-off-by: Jon Mason <jon.mason@broadcom.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The bgmac driver is using the bcma provides device ID and revision, as
well as the SoC ID and package, to determine which features are
necessary to enable, reset, etc in the driver. In anticipation of
removing the bcma requirement for this driver, these must be changed to
not reference that struct. In place of that, each "feature" has been
given a flag, and the flags are enabled for their respective device and
SoC.
Signed-off-by: Jon Mason <jon.mason@broadcom.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Move the BCMA MDIO phy into a separate file, as it is very tightly
coupled with the BCMA bus. This will help with the upcoming BCMA
removal from the bgmac driver. Optimally, this should be moved into
phy drivers, but it is too tightly coupled with the bgmac driver to
effectively move it without more changes to the driver.
Note: the phy_reset was intentionally removed, as the mdio phy subsystem
automatically resets the phy if a reset function pointer is present. In
addition to the moving of the driver, this reset function is added.
Signed-off-by: Jon Mason <jon.mason@broadcom.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The dma buffer allocation, etc references a dma_dev device pointer from
the bcma core. In anticipation of removing the bcma requirement for
this driver, these must be changed to not reference that struct. Add a
dma_dev device pointer to the bgmac stuct and reference that instead.
Signed-off-by: Jon Mason <jon.mason@broadcom.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The bgmac_* print wrappers call dev_* prints with the dev pointer from
the bcma core. In anticipation of removing the bcma requirement for
this driver, these must be changed to not reference that struct. So,
simply change all of the bgmac_* prints to their dev_* counterparts. In
some cases netdev_* prints are more appropriate, so change those as
well.
Signed-off-by: Jon Mason <jon.mason@broadcom.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
An important information for the napi_poll tracepoint is knowing
the work done (packets processed) by the napi_poll() call. Add
both the work done and budget, as they are related.
Handle trace_napi_poll() param change in dropwatch/drop_monitor
and in python perf script netdev-times.py in backward compat way,
as python fortunately supports optional parameter handling.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Hayes Wang says:
====================
r8152: remove the redundant code
Remove the unnacessary code.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
There is no conflict between the work_queue function and
rtl8152_set_speed(), so we don't have to cancel the delayed work in
rtl8152_set_speed().
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
After commit 90186af404 ("r8152: fix lockup when runtime PM is enabled"),
the autoresume wouldn't start the device before rtl8152_open() is finished.
Therefore, we don't have to reset the linking status before and after
autoresume. That is, one of netif_carrier_off() in rtl8152_open() could be
removed.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
