1. 01 4月, 2007 1 次提交
    • A
      [SCSI] lpfc: fix oops when parsing dodgy VPD · 07da60c1
      Anton Blanchard 提交于
      We have seen two cases where VPD on an emulex card has been incorrect
      and we end up walking off the end of memory. It looks like someone made
      an update (increased the length of a string) without increasing the
      Length field. Then we do:
      
      	Length -= (3+i);
      
      And since Length is unsigned it becomes very large and we loop forever
      in the encapsulating:
      
      	while (Length > 0) {
      
      If we make Length signed then we fall out of the loop and proceed on.
      
      Its important to note we have only seen this in the lab and it may be
      the only two cases of this in existence, but since the rest of the code
      has been written to be resilient against bad VPD we may as well fix this
      too.
      Signed-off-by: NAnton Blanchard <anton@samba.org>
      Acked-by: NJames Smart <James.Smart@Emulex.Com>
      Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>
      07da60c1
  2. 11 3月, 2007 1 次提交
  3. 16 2月, 2007 1 次提交
  4. 06 1月, 2007 1 次提交
  5. 03 12月, 2006 9 次提交
  6. 31 10月, 2006 1 次提交
    • P
      [PATCH] lockdep: annotate DECLARE_WAIT_QUEUE_HEAD · 7259f0d0
      Peter Zijlstra 提交于
      kernel: INFO: trying to register non-static key.
      kernel: the code is fine but needs lockdep annotation.
      kernel: turning off the locking correctness validator.
      kernel:  [<c04051ed>] show_trace_log_lvl+0x58/0x16a
      kernel:  [<c04057fa>] show_trace+0xd/0x10
      kernel:  [<c0405913>] dump_stack+0x19/0x1b
      kernel:  [<c043b1e2>] __lock_acquire+0xf0/0x90d
      kernel:  [<c043bf70>] lock_acquire+0x4b/0x6b
      kernel:  [<c061472f>] _spin_lock_irqsave+0x22/0x32
      kernel:  [<c04363d3>] prepare_to_wait+0x17/0x4b
      kernel:  [<f89a24b6>] lpfc_do_work+0xdd/0xcc2 [lpfc]
      kernel:  [<c04361b9>] kthread+0xc3/0xf2
      kernel:  [<c0402005>] kernel_thread_helper+0x5/0xb
      
      Another case of non-static lockdep keys; duplicate the paradigm set by
      DECLARE_COMPLETION_ONSTACK and introduce DECLARE_WAIT_QUEUE_HEAD_ONSTACK.
      Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Greg KH <gregkh@suse.de>
      Cc: Markus Lidel <markus.lidel@shadowconnect.com>
      Acked-by: NIngo Molnar <mingo@elte.hu>
      Cc: Arjan van de Ven <arjan@infradead.org>
      Cc: James Bottomley <James.Bottomley@steeleye.com>
      Cc: Marcel Holtmann <marcel@holtmann.org>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      7259f0d0
  7. 26 10月, 2006 2 次提交
  8. 05 10月, 2006 1 次提交
    • D
      IRQ: Maintain regs pointer globally rather than passing to IRQ handlers · 7d12e780
      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
  9. 02 10月, 2006 1 次提交
    • S
      [PATCH] namespaces: utsname: use init_utsname when appropriate · 96b644bd
      Serge E. Hallyn 提交于
      In some places, particularly drivers and __init code, the init utsns is the
      appropriate one to use.  This patch replaces those with a the init_utsname
      helper.
      
      Changes: Removed several uses of init_utsname().  Hope I picked all the
      	right ones in net/ipv4/ipconfig.c.  These are now changed to
      	utsname() (the per-process namespace utsname) in the previous
      	patch (2/7)
      
      [akpm@osdl.org: CIFS fix]
      Signed-off-by: NSerge E. Hallyn <serue@us.ibm.com>
      Cc: Kirill Korotaev <dev@openvz.org>
      Cc: "Eric W. Biederman" <ebiederm@xmission.com>
      Cc: Herbert Poetzl <herbert@13thfloor.at>
      Cc: Andrey Savochkin <saw@sw.ru>
      Cc: Serge Hallyn <serue@us.ibm.com>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      96b644bd
  10. 27 9月, 2006 1 次提交
  11. 05 9月, 2006 3 次提交
  12. 03 9月, 2006 2 次提交
  13. 20 8月, 2006 3 次提交
  14. 07 8月, 2006 6 次提交
  15. 09 7月, 2006 7 次提交