Commit graph

23 commits

Author SHA1 Message Date
Hidehiro Kawai
82802f968b ipmi: Don't flush messages in sender() in run-to-completion mode
When flushing queued messages in run-to-completion mode,
smi_event_handler() is recursively called.

flush_messages()
 smi_event_handler()
  handle_transaction_done()
   deliver_recv_msg()
    ipmi_smi_msg_received()
     smi_recv_tasklet()
      sender()
       flush_messages()
        smi_event_handler()
         ...

The depth of the recursive call depends on the number of queued
messages, so it can cause a stack overflow if many messages have
been queued.

To solve this problem, this patch removes flush_messages()
from sender()@ipmi_si_intf.c.  Instead, add flush_messages() to
caller side of sender() if needed.  Additionally, to implement this,
add new handler flush_messages to struct ipmi_smi_handlers.

Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com>

Fixed up a comment and some spacing issues.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
2015-09-03 15:02:28 -05:00
Corey Minyard
81d02b7f8c ipmi: Make some data const that was only read
Several data structures were only used for reading, so make them
const.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
2015-09-03 15:02:27 -05:00
Corey Minyard
99ab32f3b5 ipmi: Remove the now unused priority from SMI sender
Since the queue was moved into the message handler, the priority
field is now irrelevant.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
2014-12-11 15:04:11 -06:00
Corey Minyard
5a0e10ec4a ipmi: Remove useless sysfs_name parameters
It was always "bmc", so just hardcode it.  It makes no sense to
pass that in.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
2014-12-11 15:04:05 -06:00
Corey Minyard
7aefac26fc ipmi: boolify some things
Convert some ints to bools.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-17 12:30:40 -07:00
Corey Minyard
89986496de ipmi: Turn off all activity on an idle ipmi interface
The IPMI driver would wake up periodically looking for events and
watchdog pretimeouts.  If there is nothing waiting for these events,
it's really kind of pointless to be checking for them.  So modify the
driver so the message handler can pass down if it needs the lower layer
to be waiting for these.  Modify the system interface lower layer to
turn off all timer and thread activity if the upper layer doesn't need
anything and it is not currently handling messages.  And modify the
message handler to not restart the timer if its timer is not needed.

The timers and kthread will still be enabled if:
 - the SI interface is handling a message.
 - a user has enabled watching for events.
 - the IPMI watchdog timer is in use (since it uses pretimeouts).
 - the message handler is waiting on a remote response.
 - a user has registered to receive commands.

This mostly affects interfaces without interrupts.  Interfaces with
interrupts already don't use CPU in the system interface when the
interface is idle.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-04-17 12:23:07 -07:00
Adam Buchbinder
b3834be5c4 various: Fix spelling of "asynchronous" in comments.
"Asynchronous" is misspelled in some comments. No code changes.

Signed-off-by: Adam Buchbinder <adam.buchbinder@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2012-11-19 14:32:13 +01:00
Paul Gortmaker
313162d0b8 device.h: audit and cleanup users in main include dir
The <linux/device.h> header includes a lot of stuff, and
it in turn gets a lot of use just for the basic "struct device"
which appears so often.

Clean up the users as follows:

1) For those headers only needing "struct device" as a pointer
in fcn args, replace the include with exactly that.

2) For headers not really using anything from device.h, simply
delete the include altogether.

3) For headers relying on getting device.h implicitly before
being included themselves, now explicitly include device.h

4) For files in which doing #1 or #2 uncovers an implicit
dependency on some other header, fix by explicitly adding
the required header(s).

Any C files that were implicitly relying on device.h to be
present have already been dealt with in advance.

Total removals from #1 and #2: 51.  Total additions coming
from #3: 9.  Total other implicit dependencies from #4: 7.

As of 3.3-rc1, there were 110, so a net removal of 42 gives
about a 38% reduction in device.h presence in include/*

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2012-03-16 10:38:24 -04:00
Paul Gortmaker
de47725421 include: replace linux/module.h with "struct module" wherever possible
The <linux/module.h> pretty much brings in the kitchen sink along
with it, so it should be avoided wherever reasonably possible in
terms of being included from other commonly used <linux/something.h>
files, as it results in a measureable increase on compile times.

The worst culprit was probably device.h since it is used everywhere.
This file also had an implicit dependency/usage of mutex.h which was
masked by module.h, and is also fixed here at the same time.

There are over a dozen other headers that simply declare the
struct instead of pulling in the whole file, so follow their lead
and simply make it a few more.

Most of the implicit dependencies on module.h being present by
these headers pulling it in have been now weeded out, so we can
finally make this change with hopefully minimal breakage.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-10-31 19:32:32 -04:00
Alexey Dobriyan
074127367a ipmi: convert to seq_file interface
The ->read_proc interface is going away, convert to seq_file.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc:Corey Minyard <minyard@acm.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-26 17:12:37 -07:00
Zhao Yakui
16f4232ce4 IPMI: Add one interface to get more info of low-level IPMI device
The IPMI smi_watcher will be used to catch the IPMI interface as they
come or go.  In order to communicate with the correct IPMI device, it
should be confirmed whether it is what we wanted especially on the
system with multiple IPMI devices. But the new_smi callback function
of smi_watcher provides very limited info(only the interface number
and dev pointer) and there is no detailed info about the low level
interface. For example: which mechansim registers the IPMI
interface(ACPI, PCI, DMI and so on).

This is to add one interface that can get more info of low-level IPMI
device. For example: the ACPI device handle will be returned for the
pnp_acpi IPMI device.

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2010-12-14 00:21:51 -05:00
Corey Minyard
6edb676440 ipmi: remove ipmi_smi.h self-include
There is no need for linux/ipmi_smi.h to include itself.

Signed-off-by: Corey Minyard <minyard@acm.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-12 15:52:40 -08:00
Alexey Dobriyan
99b7623380 proc 2/2: remove struct proc_dir_entry::owner
Setting ->owner as done currently (pde->owner = THIS_MODULE) is racy
as correctly noted at bug #12454. Someone can lookup entry with NULL
->owner, thus not pinning enything, and release it later resulting
in module refcount underflow.

We can keep ->owner and supply it at registration time like ->proc_fops
and ->data.

But this leaves ->owner as easy-manipulative field (just one C assignment)
and somebody will forget to unpin previous/pin current module when
switching ->owner. ->proc_fops is declared as "const" which should give
some thoughts.

->read_proc/->write_proc were just fixed to not require ->owner for
protection.

rmmod'ed directories will be empty and return "." and ".." -- no harm.
And directories with tricky enough readdir and lookup shouldn't be modular.
We definitely don't want such modular code.

Removing ->owner will also make PDE smaller.

So, let's nuke it.

Kudos to Jeff Layton for reminding about this, let's say, oversight.

http://bugzilla.kernel.org/show_bug.cgi?id=12454

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
2009-03-31 01:14:44 +04:00
Alexey Dobriyan
fa68be0def ipmi: remove ->write_proc code
IPMI code theoretically allows ->write_proc users, but nobody uses this thus
far.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Corey Minyard <minyard@acm.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29 08:06:15 -07:00
Corey Minyard
c70d749986 ipmi: style fixes in the base code
Lots of style fixes for the base IPMI driver.  No functional changes.
Basically fixes everything reported by checkpatch and fixes the comment
style.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-29 08:06:15 -07:00
Corey Minyard
64e862a579 IPMI: fix comparison in demangle_device_id
Coverity spotted some incorrect code in a recent change to the IPMI driver;
this patch make sure the data is really long enough to pull the
manufacturer id and product id out of a get device id message.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Cc: Adrian Bunk <bunk@kernel.org>
Cc: Stian Jordet <liste@jordet.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-30 08:06:55 -07:00
Robert P. J. Day
3a4fa0a25d Fix misspellings of "system", "controller", "interrupt" and "necessary".
Fix the various misspellings of "system", controller", "interrupt" and
"[un]necessary".

Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
2007-10-19 23:10:43 +02:00
Corey Minyard
d8c98618f4 IPMI: add 0.9 support
Add support for IPMI 0.9 systems to the IPMI driver.  Just handle a shorter
get device ID command with less information.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Cc: Stian Jordet <liste@jordet.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-18 14:37:32 -07:00
Corey Minyard
b9675136e2 [PATCH] IPMI: Add maintenance mode
Some commands and operations on a BMC can cause the BMC to "go away" for a
while.  This can cause the automatic flag processing and other things of that
nature to timeout and generate annoying logs, or possibly cause other bad
things to happen when in firmware update mode.

Add detection of those commands (cold reset, warm reset, and any firmware
command) and turns off automatic processing for 30 seconds.  It also add a
manual override either way.

Signed-off-by: Corey Minyard <minyard@acm.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:47 -08:00
Corey Minyard
759643b874 [PATCH] IPMI: pass sysfs name from lower level driver
Pass in the sysfs name from the lower-level IPMI driver, as the coming IPMI
serial driver will need that to link properly from the serial device sysfs
directory.

Signed-off-by: Corey Minyard <minyard@acm.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:47 -08:00
Corey Minyard
453823ba08 [PATCH] IPMI: fix startup race condition
Matt Domsch noticed a startup race with the IPMI kernel thread, it was
possible (though extraordinarly unlikely) that a message could come in
before the upper layer was ready to handle it.  This patch splits the
startup processing of an IPMI interface into two parts, one to get ready
and one to actually start the processes to receive messages from the
interface.

[akpm@osdl.org: cleanups]
Signed-off-by: Corey Minyard <minyard@acm.org>
Cc: Matt Domsch <Matt_Domsch@dell.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-31 12:18:54 -08:00
Corey Minyard
50c812b2b9 [PATCH] ipmi: add full sysfs support
Add full driver model support for the IPMI driver.  It links in the proper
bus and device support.

It adds an "ipmi" driver interface that has each BMC discovered by the
driver (as a device).  These BMCs appear in the devices/platform directory.
 If there are multiple interfaces to the same BMC, the driver should
discover this and will only have one BMC entry.  The BMC entry will have
pointers to each interface device that connects to it.

The device information (statistics and config information) has not yet been
ported over to the driver model from proc, that will come later.

This work was based on work by Yani Ioannou.  I basically rewrote it using
that code as a guide, but he still deserves credit :).

[bunk@stusta.de: make ipmi_find_bmc_guid() static]
Signed-off-by: Corey Minyard <minyard@acm.org>
Signed-off-by: Yani Ioannou <yani.ioannou@gmail.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-26 08:56:56 -08:00
Linus Torvalds
1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00