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  1. 05 10月, 2006 1 次提交
    • D
      IRQ: Maintain regs pointer globally rather than passing to IRQ handlers · 7d12e780
      由 David Howells 提交于 
      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
handling.

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:

	set_irq_regs(old_regs);

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
     irq_handler_t.
Signed-Off-By: NDavid Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
      7d12e780
  3. 01 10月, 2006 1 次提交
    • J
      drivers/net/wireless/{airo,ipw2100}: fix error handling bugs · de897881
      由 Jeff Garzik 提交于 
      airo:
* fix oops, if !CONFIG_PROC_FS (create_proc_entry always returns NULL)

* handle pci_register_driver() failure.  if it fails, we really do
  want to exit, rather than (as a comment indicates) return success
  because-we-are-a-library.

* #if 0 have_isa_dev variable, which is assigned a value but never used

ipw2100:
* handle sysfs_create_group() failure

* handle driver_create_file() failure
Signed-off-by: NJeff Garzik <jeff@garzik.org>
      de897881
  5. 26 9月, 2006 1 次提交
  7. 21 9月, 2006 1 次提交
  9. 30 8月, 2006 1 次提交
    • S
      [PATCH] kthread: airo.c · 3b4c7d64
      由 Sukadev Bhattiprolu 提交于 
      The airo driver is currently caching a pid for later use, but with the
implementation of containers, pids themselves do not uniquely identify a
task.  The driver is also using kernel_thread() which is deprecated in
drivers.

This patch essentially replaces the kernel_thread() with kthread_create().
It also stores the task_struct of the airo_thread rather than its pid.
Since this introduces a second task_struct in struct airo_info, the patch
renames airo_info.task to airo_info.list_bss_task.

As an extension of these changes, the patch further:

	 - replaces kill_proc() with kthread_stop()
	 - replaces signal_pending() with kthread_should_stop()
	 - removes thread completion synchronisation which is handled by
	   kthread_stop().

[akpm@osdl.org: fix races]
Signed-off-by: NSukadev Bhattiprolu <sukadev@us.ibm.com>
Cc: Javier Achirica <achirica@gmail.com>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
      3b4c7d64
  11. 28 7月, 2006 1 次提交
  13. 03 7月, 2006 1 次提交
  15. 01 7月, 2006 1 次提交
  17. 06 5月, 2006 1 次提交
  19. 25 4月, 2006 1 次提交
  21. 20 4月, 2006 1 次提交
  23. 24 3月, 2006 3 次提交
  25. 28 2月, 2006 1 次提交
  27. 17 2月, 2006 1 次提交
  29. 31 1月, 2006 2 次提交
  31. 17 1月, 2006 2 次提交
  33. 01 12月, 2005 2 次提交
    • D
      [PATCH] airo.c: add support for IW_ENCODE_TEMP (i.e. xsupplicant) · f89b2321
      由 Dan Streetman 提交于 
      Hello Jeff,

this patch changes causes the airo driver to not reset the card when a
temporary WEP key is set, when the IW_ENCODE_TEMP flag is used.  This is
needed for xsupplicant as 802.1x, LEAP, etc. change WEP keys frequently
after authentication and resetting the card causes infinite
reauthentication.

Javier and Jean agree with the patch, Javier suggested I send this to
you, can you apply this?

Thanks.
Signed-off-by: NDan Streetman <ddstreet@ieee.org>
Signed-off-by: NJeff Garzik <jgarzik@pobox.com>
      f89b2321
    • M
      [wireless airo] reset card in init · 1d97f384
      由 Matthieu CASTET 提交于 
      without this patch after an rmmod, modprobe the card won't work anymore
until the next reboot.

This patch seem safe to apply for all cards as the bsd driver already do
that.

I had to add a timeout because strange things happen (issuecommand will
fail) if the card is already reseted (after a reboot).

PS : it seems there are missing reset when leaving monitor mode...
Signed-off-by: NMatthieu CASTET <castet.matthieu@free.fr>
      1d97f384
  35. 08 11月, 2005 1 次提交
  37. 06 11月, 2005 2 次提交
  39. 30 10月, 2005 2 次提交
  41. 29 10月, 2005 1 次提交
  43. 04 10月, 2005 1 次提交
    • M
      airo: fix resume · 53232803
      由 Michal Schmidt 提交于 
      Cisco Aironet doesn't resume properly from swsusp, because the resume
method confuses a PM_EVENT_* for a PCI power state. It thinks that it is
resuming from PCI_D1 and doesn't do the necessary initialization of the
card.
Signed-off-by: NMichal Schmidt <xschmi00@stud.feec.vutbr.cz>
      53232803
  45. 24 9月, 2005 2 次提交
  47. 14 9月, 2005 1 次提交
  49. 07 9月, 2005 2 次提交
  51. 05 9月, 2005 1 次提交
  53. 02 9月, 2005 2 次提交
  55. 28 7月, 2005 1 次提交
  57. 09 7月, 2005 1 次提交
  59. 27 6月, 2005 1 次提交
    • D
      [PATCH] wireless: char* -> char[] conversion in airo.c · 62595eb9
      由 Domen Puncer 提交于 
      This conversion makes code from line 7101 right:
	if (copy_to_user(com.data, swversion, sizeof(swversion)))

size output (before, after):
  55416    2228     160   57804    e1cc drivers/net/wireless/airo.o
  55412    2228     160   57800    e1c8 drivers/net/wireless/airo.o

more outputs from Alexey Dobriyan:
2.95.3:
           text    data     bss     dec     hex filename
before    51118    2156     160   53434    d0ba drivers/net/wireless/airo.o
after     51118    2156     160   53434    d0ba drivers/net/wireless/airo.o

3.3.5-20050130:
before    46999    2156     160   49315    c0a3 drivers/net/wireless/airo.o
after     46994    2156     160   49310    c09e drivers/net/wireless/airo.o

4.1.0-20050522:
before    45555    2220     160   47935    bb3f drivers/net/wireless/airo.o
after     45550    2220     160   47930    bb3a drivers/net/wireless/airo.o
Signed-off-by: NDomen Puncer <domen@coderock.org>
      62595eb9