i.e. one or more drives can be added and the array will re-stripe
while on-line.

Most of the interesting work was already done for raid5.  This just extends it
to raid6.

mdadm newer than 2.6 is needed for complete safety, however any version of
mdadm which support raid5 reshape will do a good enough job in almost all
cases (an 'echo repair > /sys/block/mdX/md/sync_action' is recommended after a
reshape that was aborted and had to be restarted with an such a version of
mdadm).
Signed-off-by: NNeil Brown <neilb@suse.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

An error always aborts any resync/recovery/reshape on the understanding that
it will immediately be restarted if that still makes sense.  However a reshape
currently doesn't get restarted.  With this patch it does.

To avoid restarting when it is not possible to do work, we call into the
personality to check that a reshape is ok, and strengthen raid5_check_reshape
to fail if there are too many failed devices.

We also break some code out into a separate function: remove_and_add_spares as
the indent level for that code was getting crazy.
Signed-off-by: NNeil Brown <neilb@suse.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The mddev and queue might be used for another array which does not set these,
so they need to be cleared.
Signed-off-by: NNeilBrown <neilb@suse.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

md tries to warn the user if they e.g.  create a raid1 using two partitions of
the same device, as this does not provide true redundancy.

However it also warns if a raid0 is created like this, and there is nothing
wrong with that.

At the place where the warning is currently printer, we don't necessarily know
what level the array will be, so move the warning from the point where the
device is added to the point where the array is started.
Signed-off-by: NNeil Brown <neilb@suse.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

- Use kernel_fpu_begin() and kernel_fpu_end()
- Use boot_cpu_has() for feature testing even in userspace
Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
Signed-off-by: NNeil Brown <neilb@suse.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

There are two errors that can lead to recovery problems with raid10
when used in 'far' more (not the default).

Due to a '>' instead of '>=' the wrong block is located which would result in
garbage being written to some random location, quite possible outside the
range of the device, causing the newly reconstructed device to fail.

The device size calculation had some rounding errors (it didn't round when it
should) and so recovery would go a few blocks too far which would again cause
a write to a random block address and probably a device error.

The code for working with device sizes was fairly confused and spread out, so
this has been tided up a bit.
Signed-off-by: NNeil Brown <neilb@suse.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

If register_blkdev() or alloc-disk fail in mm_init() after
pci_register_driver() succeeds, then mm_pci_driver is not unregistered
properly:

Cc: Philip Guo <pg@cs.stanford.edu>
Signed-off-by: NNeil Brown <neilb@suse.de>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: NAdrian Bunk <bunk@stusta.de>
Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Compiler warning spots real error!

The function do_rom_fast_read called in do_rom_fast_write can fail
and leave data1 unset. This causes a compile warning.
The correct thing is to propagate the error out.
Signed-off-by: NStephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Bob Tracy <rct@gherkin.frus.com> reported that the addition of support
for Aculab E1/T1 cPCI carrier cards broke detection of vanilla natsemi
cards.  This patch fixes that: the problem is that the driver-specific
ta in the PCI device table is an index into a second table and this
had not been updated for the vanilla cards.

This patch fixes the problem minimally.
Signed-Off-By: NMark Brown <broonie@sirena.org.uk>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Signed-off-by: NAlan Cox <alan@redhat.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Chelsio without NAPI enabled has been broken (won't compile) since
3de00b89 ("chelsio: NAPI speed improvement"):

    drivers/net/chelsio/sge.c: In function `t1_interrupt`:
    drivers/net/chelsio/sge.c:1716: error: `Q` undeclared (first use in this function)

The change below seems to add back in the declaration and
initialization of `Q` that was removed by mistake, and at least makes
the driver compile for me, although I have no hardware and hence no
way to test whether this actually works.
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Populate Rx free list with pages.
Signed-off-by: NDivy Le Ray <divy@chelsio.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Improve the traffic recovery after the HW ran out of response queue entries.
Signed-off-by: NDivy Le Ray <divy@chelsio.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Offload packets may be DMAed long after their SGE Tx descriptors are done
so they must remain mapped until they are freed rather than until their
descriptors are freed.  Unmap such packets through an skb destructor.
Signed-off-by: NDivy Le Ray <divy@chelsio.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Update FW version to 3.2
Signed-off-by: NDivy Le Ray <divy@chelsio.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Clean up some private ioctls.
Signed-off-by: NDivy Le Ray <divy@chelsio.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

sysfs attributes are now managed per port, no longer per adapter.
Signed-off-by: NDivy Le Ray <divy@chelsio.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

- Restore in s2io_reset, the mac address assigned during s2io_open.
  Earlier, it was getting overwritten to the factory default (read from the
  eeprom) and subsequently dropping received frames.

- Fixed the typo in calling rtnl_unlock in s2io_set_link function.
Signed-off-by: NSivakumar Subramani <sivakumar.subramani@neterion.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

- Enhanced Statistics are supported only for Xframe II (Herculas) card. Add
  condition check such Enhanced statistics will included only in the case of
  Xframe II card.
Signed-off-by: NSivakumar Subramani <sivakumar.subramani@neterion.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

- Turning off LED for LINK_DOWN notification
- Return from rxd_owner_bit_reset function if call to set_rxd_buffer_pointer
  fails with ENOMEM
Signed-off-by: NSivakumar Subramani <sivakumar.subramani@neterion.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

- Added code to not to strip vlan tag when driver is in promiscuous mode
- Added module loadable parameter 'vlan_tag_strip" through which user can
  enable or disable vlan stripping irrespective of mode
  ( promiscuous or non-promiscuous ).
Signed-off-by: NSivakumar Subramani <sivakumar.subramani@neterion.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

- Optimized delay to wait for command completion so as to reduce the
  initialization wait time.
- Disable differentiated services steering. By default RMAC is configured to
  steer traffic with certain DS codes to other queues. Driver must initialize
  the DS memory to 0 to make sure that DS steering will not be used by default.
Signed-off-by: NSivakumar Subramani <sivakumar.subramani@neterion.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

- Added debug statements to print a debug message if the MSI/MSI-X vector (or)
  data is zero.

- This patch removes the code that will enable NAPI for the case of single
  ring and MSI-X / MSI case. There are some issue in the enabling NAPI with
  MSI/MSI-X.  So we are turning off NAPI in the case of MSI/MSI-X.
Signed-off-by: NSivakumar Subramani <sivakumar.subramani@neterion.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Signed-off-by: NBenjamin Li <benjamin.li@qlogic.com>
Signed-off-by: NRon Mercer <ron.mercer@qlogic.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

To reproduce this panic consistently, we run an intensive network
application like 'netperf'. After waiting for a couple of seconds,
you will see a stack trace and a kernel panic where we are calling
pci_unmap_single() in ql_poll().

Changes:
1)  Check the flags on the Response MAC IO Control block to check for
errors
2)  Ensure that if we are on the 4022 we only use one segment
3)  Before, we were reading the memory mapped producer index register
everytime we iterated in the loop when clearing the queue.  We should
only be iterating to a known point, not as the producer index
is being updated.
Signed-off-by: NBenjamin Li <benjamin.li@qlogic.com>
Signed-off-by: NRon Mercer <ron.mercer@qlogic.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

To Reproduce the Problem:
To reproduce this panic consistently, we run an intensive network
application like 'netperf' and then switch to a different console.
After waiting for a couple of seconds, you will see a tx reset has occured.

Reason:
We enable interrupts even if we were not running.

Solution:
Now we will enable interrupts only after we are ready to give up the poll
routine.
Signed-off-by: NRon Mercer <ron.mercer@qlogic.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

qla3xxx: Check return code from pci_map_single() in ql_release_to_lrg_buf_free_list(), ql_populate_free_queue(), ql_alloc_large_buffers(), and ql3xxx_send()

pci_map_single() could fail.  We need to properly check the return
code from pci_map_single().  If we can not properly map this address,
then we should cleanup and return the proper return code.
Signed-off-by: NBenjamin Li <benjamin.li@qlogic.com>
Signed-off-by: NRon Mercer <ron.mercer@qlogic.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

The scatter/gather lists were not being build correctly.  When
large frames spanned several buffers the chip would panic.
Signed-off-by: NRon Mercer <ron.mercer@qlogic.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Signed-off-by: NRon Mercer <ron.mercer@qlogic.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

This change removes use of constants for rx buffer queue size
and instead calculates the queue length based on what he MTU
is set to.
Signed-off-by: NRon Mercer <ron.mercer@qlogic.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

This network device driver shares the same hardware as the qla4xxx
iSCSI driver. Changing the MTU via the device interface will
cause qla4xxx to crash as there is no way to make notification.
Users wishing to change the MTU must do so using an iSCSI
utility such as Qlogic SanSurfer. This forces the user to
unload/reload this network device driver after the MTU
value has been changed in flash.
Signed-off-by: NRon Mercer <ron.mercer@qlogic.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

1) Fix deadlock issue when in QL_RESET_ACTIVE state and traversing
   through the Link State Machine
2) Fix deadlock issue when ethtool would call ql_get_settings()
3) Fix deadlock issue when adaptor is ifup'ed but adaptor fails to initialize
Signed-off-by: NBenjamin Li <benjamin.li@qlogic.com>
Signed-off-by: NRon Mercer <ron.mercer@qlogic.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Signed-off-by: NBenjamin Li <benjamin.li@qlogic.com>
Signed-off-by: NRon Mercer <ron.mercer@qlogic.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

We do not need to zero out the 64 byte MAC request I/O control block.
  By zeroing out the control block and setting it to proper fields is
redundant work.  This is because in the qla3xxx_send() function we will
already set the proper fields in this structure.  The unused fields are
not looked at by the hardware and do not need to be zeroed out.
Signed-off-by: NBenjamin Li <benjamin.li@qlogic.com>
Signed-off-by: NRon Mercer <ron.mercer@qlogic.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

The return code was not properly set when when allocating memory or mapping
memory failed.  Depending on the stack, the return code would sometimes
return 0, which indicates everything was ok, when in fact there was an error.
  This would cause trouble when the module was removed.  Now, we will pass
back the proper return code when an error occurs during the PCI probe.
Signed-off-by: NBenjamin Li <benjamin.li@qlogic.com>
Signed-off-by: NRon Mercer <ron.mercer@qlogic.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

The driver contains this little piece of candy:

#if defined(CONFIG_DMA_NONCOHERENT) || defined(CONFIG_NOT_COHERENT_CACHE)
#define ETH_DMA_ALIGN           L1_CACHE_BYTES
#else
#define ETH_DMA_ALIGN           8
#endif

Any reason why we're not using dma_get_cache_alignment() instead?

  Ralf
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Update ucc_geth_probe() to use function of_get_mac_address() to obtain the MAC
address.
Signed-off-by: NTimur Tabi <timur@freescale.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

Use comma's consistently.
Signed-off-by: NStephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: NJeff Garzik <jeff@garzik.org>