1. 03 Jul, 2008 1 commit
  2. 01 Feb, 2008 2 commits
  3. 12 Oct, 2007 6 commits
  4. 11 Sep, 2007 1 commit
  5. 12 Jul, 2007 1 commit
    • Alan Stern's avatar
      USB: prevent char device open/deregister race · d4ead16f
      Alan Stern authored
      This patch (as908) adds central protection in usbcore for the
      prototypical race between opening and unregistering a char device.
      The spinlock used to protect the minor-numbers array is replaced with
      an rwsem, which can remain locked across a call to a driver's open()
      method.  This guarantees that open() and deregister() will be mutually
      The private locks currently used in several individual drivers for
      this purpose are no longer necessary, and the patch removes them.  The
      following USB drivers are affected: usblcd, idmouse, auerswald,
      legousbtower, sisusbvga/sisusb, ldusb, adutux, iowarrior, and
      As a side effect of this change, usb_deregister_dev() must not be
      called while holding a lock that is acquired by open().  Unfortunately
      a number of drivers do this, but luckily the solution is simple: call
      usb_deregister_dev() before acquiring the lock.
      In addition to these changes (and their consequent code
      simplifications), the patch fixes a use-after-free bug in adutux and a
      race between open() and release() in iowarrior.
      Signed-off-by: default avatarAlan Stern <stern@rowland.harvard.edu>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
  6. 14 Feb, 2007 1 commit
    • Tim Schmielau's avatar
      [PATCH] remove many unneeded #includes of sched.h · cd354f1a
      Tim Schmielau authored
      After Al Viro (finally) succeeded in removing the sched.h #include in module.h
      recently, it makes sense again to remove other superfluous sched.h includes.
      There are quite a lot of files which include it but don't actually need
      anything defined in there.  Presumably these includes were once needed for
      macros that used to live in sched.h, but moved to other header files in the
      course of cleaning it up.
      To ease the pain, this time I did not fiddle with any header files and only
      removed #includes from .c-files, which tend to cause less trouble.
      Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha,
      arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig,
      allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all
      configs in arch/arm/configs on arm.  I also checked that no new warnings were
      introduced by the patch (actually, some warnings are removed that were emitted
      by unnecessarily included header files).
      Signed-off-by: default avatarTim Schmielau <tim@physik3.uni-rostock.de>
      Acked-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
  7. 08 Dec, 2006 1 commit
  8. 05 Oct, 2006 1 commit
    • David Howells's avatar
      IRQ: Maintain regs pointer globally rather than passing to IRQ handlers · 7d12e780
      David Howells authored
      Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
      of passing regs around manually through all ~1800 interrupt handlers in the
      Linux kernel.
      The regs pointer is used in few places, but it potentially costs both stack
      space and code to pass it around.  On the FRV arch, removing the regs parameter
      from all the genirq function results in a 20% speed up of the IRQ exit path
      (ie: from leaving timer_interrupt() to leaving do_IRQ()).
      Where appropriate, an arch may override the generic storage facility and do
      something different with the variable.  On FRV, for instance, the address is
      maintained in GR28 at all times inside the kernel as part of general exception
      Having looked over the code, it appears that the parameter may be handed down
      through up to twenty or so layers of functions.  Consider a USB character
      device attached to a USB hub, attached to a USB controller that posts its
      interrupts through a cascaded auxiliary interrupt controller.  A character
      device driver may want to pass regs to the sysrq handler through the input
      layer which adds another few layers of parameter passing.
      I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
      main part of the code on FRV and i386, though I can't test most of the drivers.
      I've also done partial conversion for powerpc and MIPS - these at least compile
      with minimal configurations.
      This will affect all archs.  Mostly the changes should be relatively easy.
      Take do_IRQ(), store the regs pointer at the beginning, saving the old one:
      	struct pt_regs *old_regs = set_irq_regs(regs);
      And put the old one back at the end:
      Don't pass regs through to generic_handle_irq() or __do_IRQ().
      In timer_interrupt(), this sort of change will be necessary:
      	-	update_process_times(user_mode(regs));
      	-	profile_tick(CPU_PROFILING, regs);
      	+	update_process_times(user_mode(get_irq_regs()));
      	+	profile_tick(CPU_PROFILING);
      I'd like to move update_process_times()'s use of get_irq_regs() into itself,
      except that i386, alone of the archs, uses something other than user_mode().
      Some notes on the interrupt handling in the drivers:
       (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
           the input_dev struct.
       (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
           something different depending on whether it's been supplied with a regs
           pointer or not.
       (*) Various IRQ handler function pointers have been moved to type
      Signed-Off-By: default avatarDavid Howells <dhowells@redhat.com>
      (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
  9. 04 Oct, 2006 1 commit
  10. 27 Sep, 2006 1 commit
  11. 07 Sep, 2006 1 commit
  12. 21 Jun, 2006 2 commits
  13. 20 Mar, 2006 1 commit
  14. 04 Jan, 2006 3 commits
  15. 09 Nov, 2005 1 commit
    • Olaf Hering's avatar
      [PATCH] changing CONFIG_LOCALVERSION rebuilds too much, for no good reason · 733482e4
      Olaf Hering authored
      This patch removes almost all inclusions of linux/version.h.  The 3
      #defines are unused in most of the touched files.
      A few drivers use the simple KERNEL_VERSION(a,b,c) macro, which is
      unfortunatly in linux/version.h.
      There are also lots of #ifdef for long obsolete kernels, this was not
      touched.  In a few places, the linux/version.h include was move to where
      the LINUX_VERSION_CODE was used.
      quilt vi `find * -type f -name "*.[ch]"|xargs grep -El '(UTS_RELEASE|LINUX_VERSION_CODE|KERNEL_VERSION|linux/version.h)'|grep -Ev '(/(boot|coda|drm)/|~$)'`
      search pattern:
      Signed-off-by: default avatarOlaf Hering <olh@suse.de>
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
  16. 28 Oct, 2005 2 commits
    • Andrew Morton's avatar
      [PATCH] USB: sisusb warning fix · dabb5928
      Andrew Morton authored
      drivers/usb/misc/sisusbvga/sisusb.c: In function `sisusb_reset_text_mode':
      drivers/usb/misc/sisusbvga/sisusb.c:2461: warning: assignment discards qualifiers from pointer target type
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
       drivers/usb/misc/sisusbvga/sisusb.c |    2 +-
       1 file changed, 1 insertion(+), 1 deletion(-)
    • Greg Kroah-Hartman's avatar
      [PATCH] devfs: Remove the mode field from usb_class_driver as it's no longer needed · d6e5bcf4
      Greg Kroah-Hartman authored
      Also fixes all drivers that set this field, and removes some other devfs
      specfic USB logic.
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
       drivers/usb/class/usblp.c           |    3 +--
       drivers/usb/core/file.c             |   19 ++++---------------
       drivers/usb/image/mdc800.c          |    3 +--
       drivers/usb/input/aiptek.c          |    2 +-
       drivers/usb/input/hiddev.c          |    3 +--
       drivers/usb/media/dabusb.c          |    3 +--
       drivers/usb/misc/auerswald.c        |    3 +--
       drivers/usb/misc/idmouse.c          |    5 ++---
       drivers/usb/misc/legousbtower.c     |    5 ++---
       drivers/usb/misc/rio500.c           |    3 +--
       drivers/usb/misc/sisusbvga/sisusb.c |    5 -----
       drivers/usb/misc/usblcd.c           |    9 ++++-----
       drivers/usb/usb-skeleton.c          |    3 +--
       include/linux/usb.h                 |    7 ++-----
       14 files changed, 22 insertions(+), 51 deletions(-)
  17. 12 Sep, 2005 1 commit
    • Thomas Winischhofer's avatar
      [PATCH] USB: sisusb[vga] update · 1bbb4f20
      Thomas Winischhofer authored
      here is a new and extended version of the sisusbvga (previously: sisusb)
      driver. The patch is against 2.6.13 and updates the driver to version 0.0.8.
      Additions include complete VGA/EGA text console support and a build-in
      display mode infrastructure for userland applications that don't know
       about the graphics internals.
      Fixes include some BE/LE issues and a get/put_dev bug in the previous
      Other changes include a change of the module name from "sisusb" to
      "sisusbvga". The previous one was too generic IMHO.
      Please note that the patch also affects the Makefile in
      drivers/video/console as the driver requires the VGA 8x16 font in case
      the text console part is selected.
      Heavily tested, as usual. Please apply.
      One thing though: I already prepared for removal of the "mode" field and
      the changed "name" field in the usb_class_driver structure. This will
      perhaps need some refinement depending on whether you/Linus merge the
      respective core changes before or after 2.6.14.
      Signed-off-by: default avatarThomas Winischhofer <thomas@winischhofer.net>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
  18. 08 Sep, 2005 1 commit
    • Alan Stern's avatar
      [PATCH] USB: URB_ASYNC_UNLINK flag removed from the kernel · b375a049
      Alan Stern authored
      29 July 2005, Cambridge, MA:
      This afternoon Alan Stern submitted a patch to remove the URB_ASYNC_UNLINK
      flag from the Linux kernel.  Mr. Stern explained, "This flag is a relic
      from an earlier, less-well-designed system.  For over a year it hasn't
      been used for anything other than printing warning messages."
      An anonymous spokesman for the Linux kernel development community
      commented, "This is exactly the sort of thing we see happening all the
      time.  As the kernel evolves, support for old techniques and old code can
      be jettisoned and replaced by newer, better approaches.  Proprietary
      operating systems do not have the freedom or flexibility to change so
      Mr. Stern, a staff member at Harvard University's Rowland Institute who
      works on Linux only as a hobby, noted that the patch (labelled as548) did
      not update two files, keyspan.c and option.c, in the USB drivers' "serial"
      subdirectory.  "Those files need more extensive changes," he remarked.
      "They examine the status field of several URBs at times when they're not
      supposed to.  That will need to be fixed before the URB_ASYNC_UNLINK flag
      is removed."
      Greg Kroah-Hartman, the kernel maintainer responsible for overseeing all
      of Linux's USB drivers, did not respond to our inquiries or return our
      calls.  His only comment was "Applied, thanks."
      Signed-off-by: default avatarAlan Stern <stern@rowland.harvard.edu>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
  19. 26 Apr, 2005 1 commit
  20. 22 Apr, 2005 1 commit
  21. 18 Apr, 2005 1 commit
  22. 16 Apr, 2005 1 commit
    • Linus Torvalds's avatar
      Linux-2.6.12-rc2 · 1da177e4
      Linus Torvalds authored
      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!