spi: s3c64xx: add missing check for polling mode

After the patch "spi/s3c64xx: Fix non-dmaengine usage"
with commit id 563b444e33810f3120838620c990480304e24e63
submitted by Mark Brown, the spi device detection in polling
mode breaks. This revealed the missing check for polling during
dma prepare. This patch adds the missing check.

Signed-off-by: Girish K S <ks.giri@samsung.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
regmap: cache: bail in regmap_async_complete() for bus-less maps

Commit f8bd822cb ("regmap: cache: Factor out block sync") made
regcache_rbtree_sync() call regmap_async_complete(), which in turn does
not check for map->bus before dereferencing it.

This causes a NULL pointer dereference on bus-less maps.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Cc: stable@vger.kernel.org [v3.10 only]
Signed-off-by: Mark Brown <broonie@linaro.org>
spi/xilinx: Revert master->setup function removal

master->setup() must be initialized to be able
to successfully run spi_bitbang_start()
and satisfy if/else logic there.

"spi: convert drivers to use bits_per_word_mask"
(sha1: 24778be20f87d5aadb19624fc768b3159fa43efc)

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
spi: revert master->setup function removal for altera and nuc900

Commit 24778be "spi: convert drivers to use bits_per_word_mask" removed
what appeared to be redundant code from many drivers. However, it
appears that in the spi-bitbang case, these functions are required by
the spi-bitbang core, even if they don't do anything. Restore them.

For 3.12, the spi-bitbang core should be adjusted not to require these
callbacks to exist if they don't need to do anything.

This is the equivalent of Michal Simek's patch "spi/xilinx: Revert
master->setup function removal", applied to other affected drivers.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Merge remote-tracking branch 'spi/fix/s3c64xx' into spi-linus
Merge remote-tracking branch 'spi/fix/setup' into spi-linus
Merge remote-tracking branch 'spi/fix/xilinx' into spi-linus
Merge tag 'spi-v3.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi fixes from Mark Brown:
 "A couple of things missed during the v3.11 work here:

   - The spi-bitbang core requires a setup() function even if it does
     nothing which caused breakage when some empty setup functions were
     removed after their contents were factored out into the core.

     While this is clearly silly and will be fixed for v3.12 for now we
     just restore the functions.

   - A missing case handled in the s3c64xx driver"

* tag 'spi-v3.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: revert master->setup function removal for altera and nuc900
  spi/xilinx: Revert master->setup function removal
  spi: s3c64xx: add missing check for polling mode
Merge tag 'regmap-v3.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap

Pull regmap fix from Mark Brown:
 "Fix regmap crash for async operation on busless maps

  This fixes a crash if something tries to do an asynchronous operation
  on busless maps which was introduced during the merge window"

* tag 'regmap-v3.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
  regmap: cache: bail in regmap_async_complete() for bus-less maps
smp: blackfin: fix check error, using atomic_ops to handle atomic_t type

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>