1. 18 4月, 2012 1 次提交
  2. 14 4月, 2012 2 次提交
  3. 10 4月, 2012 1 次提交
    • J
      TTY: con3215, centralize allocation · fe2fc9ca
      Jiri Slaby 提交于
      There are two copies of allocations of device information. One of them
      is totally broken. See:
      raw->cdev = cdev;
      raw->inbuf = (char *) raw + sizeof(struct raw3215_info);
      memset(raw, 0, sizeof(struct raw3215_info));
      
      It suggests that this path was never executed. The code uses both
      raw->cdev and raw->inbuf all over. And it is NULL due to the memset
      here, so it would panic immediately. I believe nobody used that driver
      without being a system console.
      
      Either way, let us fix it by moving the allocations (and
      initializations) to a single place. This will save us some double
      initializations later too.
      
      And while at it, initialize the timer properly -- once, at the
      allocation.
      Signed-off-by: NJiri Slaby <jslaby@suse.cz>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Acked-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
      Cc: linux390@de.ibm.com
      Cc: linux-s390@vger.kernel.org
      Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      fe2fc9ca
  4. 09 3月, 2012 2 次提交
  5. 17 2月, 2012 1 次提交
  6. 30 10月, 2011 1 次提交
    • P
      [S390] fix mismatch in summation of I/O IRQ statistics · de400d6b
      Peter Oberparleiter 提交于
      Current IRQ statistics support does not show detail counts for I/O
      interrupts which are processed internally only. The result is a
      summation count which is way off such as this one:
      
                 CPU0       CPU1       CPU2
      I/O:       1331        710        442
      [...]
      QAI:         15         16         16   [I/O] QDIO Adapter Interrupt
      QDI:          1          0          0   [I/O] QDIO Interrupt
      DAS:        706        645        381   [I/O] DASD
      C15:         26         10          0   [I/O] 3215
      C70:          0          0          0   [I/O] 3270
      TAP:          0          0          0   [I/O] Tape
      VMR:          0          0          0   [I/O] Unit Record Devices
      LCS:          0          0          0   [I/O] LCS
      CLW:          0          0          0   [I/O] CLAW
      CTC:          0          0          0   [I/O] CTC
      APB:          0          0          0   [I/O] AP Bus
      
      Fix this by moving I/O interrupt accounting into the common I/O layer.
      Signed-off-by: NPeter Oberparleiter <peter.oberparleiter@de.ibm.com>
      Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
      de400d6b
  7. 23 3月, 2011 1 次提交
  8. 05 1月, 2011 1 次提交
  9. 14 1月, 2010 1 次提交
  10. 07 12月, 2009 1 次提交
  11. 22 6月, 2009 2 次提交
  12. 16 6月, 2009 2 次提交
    • M
      [S390] pm: con3215 power management callbacks · 77812a27
      Martin Schwidefsky 提交于
      Introduce the power management callbacks to the 3215 console. On suspend
      the console buffer is flushed to the 3215 device to have an empty console
      buffer. Printks done while the 3215 device is suspended are buffered in
      the 64K buffer of the 3215 device. If the buffer is full new messages will
      push out the oldest messages to make room for the most recent message.
      On resume the buffered messages are printed. If the system panics before
      the 3215 device is resumed ccw_device_force_console is used to get the
      console working again.
      Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
      77812a27
    • G
      s390: remove driver_data direct access of struct device · dff59b64
      Greg Kroah-Hartman 提交于
      In the near future, the driver core is going to not allow direct access
      to the driver_data pointer in struct device.  Instead, the functions
      dev_get_drvdata() and dev_set_drvdata() should be used.  These functions
      have been around since the beginning, so are backwards compatible with
      all older kernel versions.
      
      Thanks to Sebastian Ott <sebott@linux.vnet.ibm.com> for fixing a few
      typos in my original version of this patch.
      
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
      Cc: Sebastian Ott <sebott@linux.vnet.ibm.com>
      Cc: linux-s390@vger.kernel.org
      Cc: linux390@de.ibm.com
      Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
      dff59b64
  13. 11 10月, 2008 2 次提交
    • H
      [S390] 3215: Remove tasklet. · 408aec3c
      Heiko Carstens 提交于
      The 3215 console irq handler used to schedule a tasklet. However the
      console irq handler also gets called from the infamous cio_tpi()
      function. Which in turn does something like
      
      local_bh_disable()
      [call console irq handler]
      _local_bh_enable()
      
      _local_bh_enable() prevents execution of softirqs, which is intended
      within cio_tpi(). However there might be a new softirq pending because
      irq handler scheduled a tasklet.
      In order to prevent this behaviour we just get rid of the tasklet.
      It's not doing much anyway.
      Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
      Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
      408aec3c
    • H
      [S390] console flush on panic / reboot · 2332ce1a
      Holger Smolinski 提交于
      The s390 console drivers use the unblank callback of the console
      structure to flush the console buffer. In case of a panic or a
      reboot the CPU doing the callback can block on the console i/o.
      The other CPUs in the system continue to work. For panic this is
      not a good idea.
      
      Replace the unblank callback with proper panic/reboot notifier.
      These get called after all but one CPU have been stopped.
      Signed-off-by: NHolger Smolinski <Holger.Smolinski@de.ibm.com>
      Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
      2332ce1a
  14. 14 7月, 2008 3 次提交
  15. 30 4月, 2008 1 次提交
  16. 12 10月, 2007 1 次提交
  17. 27 4月, 2007 1 次提交
  18. 06 2月, 2007 1 次提交
  19. 14 12月, 2006 1 次提交
    • R
      [PATCH] getting rid of all casts of k[cmz]alloc() calls · 5cbded58
      Robert P. J. Day 提交于
      Run this:
      
      	#!/bin/sh
      	for f in $(grep -Erl "\([^\)]*\) *k[cmz]alloc" *) ; do
      	  echo "De-casting $f..."
      	  perl -pi -e "s/ ?= ?\([^\)]*\) *(k[cmz]alloc) *\(/ = \1\(/" $f
      	done
      
      And then go through and reinstate those cases where code is casting pointers
      to non-pointers.
      
      And then drop a few hunks which conflicted with outstanding work.
      
      Cc: Russell King <rmk@arm.linux.org.uk>, Ian Molton <spyro@f2s.com>
      Cc: Mikael Starvik <starvik@axis.com>
      Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
      Cc: Roman Zippel <zippel@linux-m68k.org>
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Kyle McMartin <kyle@mcmartin.ca>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: Jeff Dike <jdike@addtoit.com>
      Cc: Greg KH <greg@kroah.com>
      Cc: Jens Axboe <jens.axboe@oracle.com>
      Cc: Paul Fulghum <paulkf@microgate.com>
      Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
      Cc: Karsten Keil <kkeil@suse.de>
      Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
      Cc: Jeff Garzik <jeff@garzik.org>
      Cc: James Bottomley <James.Bottomley@steeleye.com>
      Cc: Ian Kent <raven@themaw.net>
      Cc: Steven French <sfrench@us.ibm.com>
      Cc: David Woodhouse <dwmw2@infradead.org>
      Cc: Neil Brown <neilb@cse.unsw.edu.au>
      Cc: Jaroslav Kysela <perex@suse.cz>
      Cc: Takashi Iwai <tiwai@suse.de>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      5cbded58
  20. 04 12月, 2006 1 次提交
  21. 02 10月, 2006 1 次提交
    • J
      [PATCH] const struct tty_operations · b68e31d0
      Jeff Dike 提交于
      As part of an SMP cleanliness pass over UML, I consted a bunch of
      structures in order to not have to document their locking.  One of these
      structures was a struct tty_operations.  In order to const it in UML
      without introducing compiler complaints, the declaration of
      tty_set_operations needs to be changed, and then all of its callers need to
      be fixed.
      
      This patch declares all struct tty_operations in the tree as const.  In all
      cases, they are static and used only as input to tty_set_operations.  As an
      extra check, I ran an i386 allyesconfig build which produced no extra
      warnings.
      
      53 drivers are affected.  I checked the history of a bunch of them, and in
      most cases, there have been only a handful of maintenance changes in the
      last six months.  serial_core.c was the busiest one that I looked at.
      Signed-off-by: NJeff Dike <jdike@addtoit.com>
      Acked-by: NAlan Cox <alan@redhat.com>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      b68e31d0
  22. 12 7月, 2006 1 次提交
  23. 01 7月, 2006 1 次提交
  24. 02 2月, 2006 1 次提交
  25. 11 1月, 2006 1 次提交
    • A
      [PATCH] TTY layer buffering revamp · 33f0f88f
      Alan Cox 提交于
      The API and code have been through various bits of initial review by
      serial driver people but they definitely need to live somewhere for a
      while so the unconverted drivers can get knocked into shape, existing
      drivers that have been updated can be better tuned and bugs whacked out.
      
      This replaces the tty flip buffers with kmalloc objects in rings. In the
      normal situation for an IRQ driven serial port at typical speeds the
      behaviour is pretty much the same, two buffers end up allocated and the
      kernel cycles between them as before.
      
      When there are delays or at high speed we now behave far better as the
      buffer pool can grow a bit rather than lose characters. This also means
      that we can operate at higher speeds reliably.
      
      For drivers that receive characters in blocks (DMA based, USB and
      especially virtualisation) the layer allows a lot of driver specific
      code that works around the tty layer with private secondary queues to be
      removed. The IBM folks need this sort of layer, the smart serial port
      people do, the virtualisers do (because a virtualised tty typically
      operates at infinite speed rather than emulating 9600 baud).
      
      Finally many drivers had invalid and unsafe attempts to avoid buffer
      overflows by directly invoking tty methods extracted out of the innards
      of work queue structs. These are no longer needed and all go away. That
      fixes various random hangs with serial ports on overflow.
      
      The other change in here is to optimise the receive_room path that is
      used by some callers. It turns out that only one ldisc uses receive room
      except asa constant and it updates it far far less than the value is
      read. We thus make it a variable not a function call.
      
      I expect the code to contain bugs due to the size alone but I'll be
      watching and squashing them and feeding out new patches as it goes.
      
      Because the buffers now dynamically expand you should only run out of
      buffering when the kernel runs out of memory for real.  That means a lot of
      the horrible hacks high performance drivers used to do just aren't needed any
      more.
      
      Description:
      
      tty_insert_flip_char is an old API and continues to work as before, as does
      tty_flip_buffer_push() [this is why many drivers dont need modification].  It
      does now also return the number of chars inserted
      
      There are also
      
      tty_buffer_request_room(tty, len)
      
      which asks for a buffer block of the length requested and returns the space
      found.  This improves efficiency with hardware that knows how much to
      transfer.
      
      and tty_insert_flip_string_flags(tty, str, flags, len)
      
      to insert a string of characters and flags
      
      For a smart interface the usual code is
      
          len = tty_request_buffer_room(tty, amount_hardware_says);
          tty_insert_flip_string(tty, buffer_from_card, len);
      
      More description!
      
      At the moment tty buffers are attached directly to the tty.  This is causing a
      lot of the problems related to tty layer locking, also problems at high speed
      and also with bursty data (such as occurs in virtualised environments)
      
      I'm working on ripping out the flip buffers and replacing them with a pool of
      dynamically allocated buffers.  This allows both for old style "byte I/O"
      devices and also helps virtualisation and smart devices where large blocks of
      data suddenely materialise and need storing.
      
      So far so good.  Lots of drivers reference tty->flip.*.  Several of them also
      call directly and unsafely into function pointers it provides.  This will all
      break.  Most drivers can use tty_insert_flip_char which can be kept as an API
      but others need more.
      
      At the moment I've added the following interfaces, if people think more will
      be needed now is a good time to say
      
       int tty_buffer_request_room(tty, size)
      
      Try and ensure at least size bytes are available, returns actual room (may be
      zero).  At the moment it just uses the flipbuf space but that will change.
      Repeated calls without characters being added are not cumulative.  (ie if you
      call it with 1, 1, 1, and then 4 you'll have four characters of space.  The
      other functions will also try and grow buffers in future but this will be a
      more efficient way when you know block sizes.
      
       int tty_insert_flip_char(tty, ch, flag)
      
      As before insert a character if there is room.  Now returns 1 for success, 0
      for failure.
      
       int tty_insert_flip_string(tty, str, len)
      
      Insert a block of non error characters.  Returns the number inserted.
      
       int tty_prepare_flip_string(tty, strptr, len)
      
      Adjust the buffer to allow len characters to be added.  Returns a buffer
      pointer in strptr and the length available.  This allows for hardware that
      needs to use functions like insl or mencpy_fromio.
      Signed-off-by: NAlan Cox <alan@redhat.com>
      Cc: Paul Fulghum <paulkf@microgate.com>
      Signed-off-by: NHirokazu Takata <takata@linux-m32r.org>
      Signed-off-by: NSerge Hallyn <serue@us.ibm.com>
      Signed-off-by: NJeff Dike <jdike@addtoit.com>
      Signed-off-by: NJohn Hawkes <hawkes@sgi.com>
      Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
      Signed-off-by: NAdrian Bunk <bunk@stusta.de>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      33f0f88f
  26. 07 11月, 2005 1 次提交
  27. 26 6月, 2005 1 次提交
  28. 17 4月, 2005 1 次提交
    • L
      Linux-2.6.12-rc2 · 1da177e4
      Linus Torvalds 提交于
      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!
      1da177e4