1. 25 Apr, 2008 1 commit
    • Jeff Garzik's avatar
      [SCSI] aha152x, eata, u14-34f: minor irq handler cleanups · e19166d5
      Jeff Garzik authored
      
      
      - remove pointless casts from void*
      
      - remove needless references to 'irq' function argument, when that
        information is already stored somewhere in a driver-private struct.
      
      - where the 'irq' function argument is known never to be used, rename
        it to 'dummy' to make this more obvious
      
      - remove always-false tests for dev_id==NULL
      
      - remove always-true tests for 'irq == host_struct->irq'
      
      - replace per-irq lookup functions and tables with a direct reference
        to data object obtained via 'dev_id' function argument, passed from
        request_irq()
      
      This change's main purpose is to prepare for the patchset in
      jgarzik/misc-2.6.git#irq-remove, that explores removal of the
      never-used 'irq' argument in each interrupt handler.
      Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
      Signed-off-by: default avatarJames Bottomley <James.Bottomley@HansenPartnership.com>
      e19166d5
  2. 11 Jan, 2008 1 commit
  3. 22 Oct, 2007 1 commit
  4. 19 Oct, 2007 1 commit
  5. 12 Oct, 2007 1 commit
  6. 04 Aug, 2007 6 commits
    • Boaz Harrosh's avatar
      [SCSI] aha152x: use data accessors and !use_sg cleanup · 2338545a
      Boaz Harrosh authored
      
      
      And finally this is the regular !use_sg cleanup
      and use of data accessors.
      Signed-off-by: default avatarBoaz Harrosh <bharrosh@panasas.com>
      Signed-off-by: default avatarJames Bottomley <James.Bottomley@SteelEye.com>
      2338545a
    • Boaz Harrosh's avatar
      [SCSI] aha152x: Fix check_condition code-path · 45333ffa
      Boaz Harrosh authored
      
      
      check_condition code-path was similar but more
      complicated to Reset. It went like this:
      
        1. extra space was allocated at aha152x_scdata for mirroring
          scsi_cmnd members.
        2. At aha152x_internal_queue() every not check_condition
          (REQUEST_SENSE) command was copied to above members in
          case of error.
        3. At busfree_run() in the DONE_CS phase if a Status of
          SAM_STAT_CHECK_CONDITION was detected. The command was
          re-queued Internally using aha152x_internal_queue(,,check_condition,)
          The old command members are over written with the
          REQUEST_SENSE info.
        4. At busfree_run() in the DONE_CS phase again. If it is a
          check_condition command, info was restored from mirror
          made at first call to aha152x_internal_queue() (see 2)
          and the command is completed.
      
      What I did is:
      
        1. Allocate less space in aha152x_scdata only for the 16-byte
          original command. (which is actually not needed by scsi-ml
          anymore at this stage. But this is to much knowledge of scsi-ml)
        2. If Status == SAM_STAT_CHECK_CONDITION, then like before
           re-queue a REQUEST_SENSE command. But only now save original
           command members. (Less of them)
        3. In aha152x_internal_queue(), just like for Reset, use the
          check_condition hint to set differently the working members.
          execute the command.
        4. At busfree_run() in the DONE_CS phase again. restore needed
           members.
      
      While at it. This patch fixes a BUG. Old code when sending
      a REQUEST_SENSE for a failed command. Would than return with
      cmd->resid == 0 which was the status of the REQUEST_SENSE.
      The failing command resid was lost. And when would resid
      be interesting if not on a failing command?
      Signed-off-by: default avatarBoaz Harrosh <bharrosh@panasas.com>
      Signed-off-by: default avatarJames Bottomley <James.Bottomley@SteelEye.com>
      45333ffa
    • Boaz Harrosh's avatar
      [SCSI] aha152x: Clean Reset path · 66acdb03
      Boaz Harrosh authored
      
      
      What Reset code was doing:  Save command's important/dangerous
      Info on stack. NULL those members from scsi_cmnd.
      Issue a Reset. wait for it to finish than restore members
      and return.
      
      What I do is save or NULL nothing. But use the "resetting"
      hint in aha152x_internal_queue() to NULL out working members
      and leave struct scsi_cmnd alone.
      
      The indent here looks funny but it will change/drop in last
      patch and it is clear this way what changed.
      Signed-off-by: default avatarJames Bottomley <James.Bottomley@SteelEye.com>
      66acdb03
    • Boaz Harrosh's avatar
      [SCSI] aha152x: preliminary fixes and some comments · 0ceb4798
      Boaz Harrosh authored
      
      
        hunk by hunk:
        - CHECK_CONDITION is what happens to cmnd->status >> 1
          or after status_byte() macro. But here it is used
          directly on status which means 0x1 which is an undefined
          bit in the standard. And is a status that will never
          return from a target.
      
        - in busfree_run at the DONE_SC phase we have 3 distinct
          operation:
      	1-if(DONE_SC->SCp.phase & check_condition)
                The REQUEST_SENSE command return.
                - Restore original command
      	  - Than continue to operation 3.
      	2-if(DONE_SC->SCp.Status==SAM_STAT_CHECK_CONDITION)
                A regular command returned with a status.
      	  - Internally re-Q a REQUEST_SENSE.
      	  - Do not do operation 3.
      	3-
      	  - Complete the command and return it to scsi-ml
           So the 0x2 in both these operations (1,2) means the scsi
           check-condition status, hence SAM_STAT_CHECK_CONDITION
      
        - Here the code asks about !(DONE_SC->SCp.Status & not_issued)
          but "not_issued" is an enum belonging to the "phase" member
          and not to the Status returned from target. The reason this
          works is because not_issued==1 and Also CHECK_CONDITION==1
          (remember from hunk 1). So actually the code was asking
          !(DONE_SC->SCp.Status & CHECK_CONDITION). Which means
          "Has the status been read from target yet?"
          Staus is read at status_run(). "not_issued" is
          cleared in seldo_run() which is usually earlier than
          status_run().
      
        So this patch does nothing as far as assembly is concerned
        but it does let the reader understand what is going on.
      Signed-off-by: default avatarBoaz Harrosh <bharrosh@panasas.com>
      Signed-off-by: default avatarJames Bottomley <James.Bottomley@SteelEye.com>
      0ceb4798
    • Boaz Harrosh's avatar
      [SCSI] aha152x: use bounce buffer · b1ee0795
      Boaz Harrosh authored
      
      
      Cause highmem buffers to be bounced to low memory until this
      driver supports highmem addresses.  Otherwise it just oopses
      on NULL buffer addresses.
      Signed-off-by: default avatarRandy Dunlap <randy.dunlap@oracle.com>
      Signed-off-by: default avatarBoaz Harrosh <bharrosh@panasas.com>
      Signed-off-by: default avatarJames Bottomley <James.Bottomley@SteelEye.com>
      b1ee0795
    • Boaz Harrosh's avatar
      [SCSI] aha152x: fix debug mode symbol conflict · 50535df3
      Boaz Harrosh authored
      
      
      The symbol <debug_locks> conflicts with the rather global one in
      include/linux/locks.h.
      Signed-off-by: default avatarRandy Dunlap <randy.dunlap@oracle.com>
      Signed-off-by: default avatarBoaz Harrosh <bharrosh@panasas.com>
      Signed-off-by: default avatarJames Bottomley <James.Bottomley@SteelEye.com>
      50535df3
  7. 22 May, 2007 1 commit
  8. 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>
      cd354f1a
  9. 22 Nov, 2006 1 commit
  10. 11 Oct, 2006 1 commit
  11. 06 Oct, 2006 1 commit
    • Jeff Garzik's avatar
      Various drivers' irq handlers: kill dead code, needless casts · c7bec5ab
      Jeff Garzik authored
      
      
      - Eliminate casts to/from void*
      
      - Eliminate checks for conditions that never occur.  These typically
        fall into two classes:
      
      	1) Checking for 'dev_id == NULL', then it is never called with
      	NULL as an argument.
      
      	2) Checking for invalid irq number, when the only caller (the
      	system) guarantees the irq handler is called with the proper
      	'irq' number argument.
      Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
      c7bec5ab
  12. 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
      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: default avatarDavid Howells <dhowells@redhat.com>
      (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
      7d12e780
  13. 23 Sep, 2006 1 commit
  14. 09 Jul, 2006 2 commits
  15. 02 Jul, 2006 1 commit
  16. 28 Feb, 2006 1 commit
  17. 27 Feb, 2006 1 commit
  18. 15 Dec, 2005 1 commit
  19. 09 Nov, 2005 1 commit
  20. 28 Oct, 2005 1 commit
  21. 17 Jun, 2005 1 commit
  22. 18 Apr, 2005 1 commit
  23. 16 Apr, 2005 2 commits
    • 's avatar
      [PATCH] remove outdated print_* functions · 1409277c
      authored
      
      
      We have the scsi_print_* functions in the proper namespace for a long
      time now and there weren't a lot users left.
      Signed-off-by: default avatarJames Bottomley <James.Bottomley@SteelEye.com>
      1409277c
    • 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!
      1da177e4