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  1. 17 12月, 2010 4 次提交
    • A
      USB: gadget: ci13xxx: don't assume that PAGE_SIZE is 4096 · 0a313c4d
      由 Artem Leonenko 提交于 
      Page size for transaction descriptors for CI13XXX has nothing
common with page size from MM. Using platform and configuration
specific PAGE_SIZE is wrong.
Signed-off-by: NArtem Leonenko <tikkeri@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
      0a313c4d
    • A
      USB: gadget: ci13xxx: fix complete() callback for no_interrupt rq's · 7c25a826
      由 Artem Leonenko 提交于 
      CI13xxx UDC driver doesn't call complete() callback for requests
with flag no_interrupt set. Thus gadget drivers (like g_ether) are
never notifed about successfully (or not) transmitted requests. As
a result in case of g_ether and queued request with no_interrupt=1
fields g_ether is never notifed about sent packets and TX stalls.

Solution: treat no_interrupt flag like all other UDC drivers do and
call complete() callback for all requests.
Signed-off-by: NArtem Leonenko <tikkeri@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
      7c25a826
    • A
      USB: gadget: update ci13xxx to work with g_ether · d9bb9c18
      由 Artem Leonenko 提交于 
      There is one nasty scenario when CI13xxx driver fails:
       a) two or more rx requests are queued (g_ether does that)
       b) rx request completed, interrupt fires and ci13xxx dequeues rq
       c) request complete() callback gets called and in turn it calls ep_queue()
               c1) in ep_queue() request gets added to the TAIL of the rx queue list
       d) ep gets primed with rq from (b)
       e) interrupt fires
       f) request gets popped from queue head for hw dequeue
       G) requets from queue head wasn't enqueued
               g1)  isr_tr_complete_low() doesn't
               enqueue more requests and it doesn't prime EP,
               rx traffic stalls

Solution:
       a) enque queued requests ASAP, i.e. before calling complete() callback.
       b) don't HW enqueue and prime endpoint with recently added request and
       use the oldest request in the queue.

Fixed issues:
       a) ep_queue() may return an error code despite request was successfully
       added to the queue (if _hardware_enqueue() fails)
       b) Added requests are always processed in LIFO order, even if they are
       added in complete() callback
       c) Finally more than two and more queued requests are processed consistently,
       even if they were added in complete() callback

The fix was successfully tested on MIPS based SoC with 4KEc CPU core and
CI13612 USB core. Board successfully boots with NFS root using g_ether
on ci13xxx udc.
Signed-off-by: NArtem Leonenko <tikkeri@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
      d9bb9c18
    • A
      USB: gadgets: ci13xxx: fix probing of compiled-in gadget drivers · 6549e8b7
      由 Artem Leonenko 提交于 
      Built-in gadget drivers have NULL-ifed unbind() function. Checking
whether unbind() is NULL will never let any compiled into kernel
driver attach.
Signed-off-by: NArtem Leonenko <tikkeri@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
      6549e8b7
  3. 11 12月, 2010 5 次提交
  5. 23 10月, 2010 1 次提交
  7. 30 3月, 2010 1 次提交
    • T
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking... · 5a0e3ad6
      由 Tejun Heo 提交于 
      include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: NTejun Heo <tj@kernel.org>
Guess-its-ok-by: NChristoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
      5a0e3ad6
  9. 16 6月, 2009 1 次提交
  11. 24 4月, 2009 2 次提交
  13. 25 3月, 2009 2 次提交
  15. 08 1月, 2009 1 次提交