EHCI: HSIC: Prevent disabling wakeup irq twice

If PM resume and Wakeup irq happen at same time
its possible to disable wakeup irq twice. Prevent
the same by protecting with spinlock

CRs-Fixed: 396895
Change-Id: I3320478d6c770787bc571964f4a38dce6927af63
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
EHCI: HSIC: Fail root hub bus suspend when port is not enabled.

HSIC controller can not detect HSIC device in low power mode.  Hence
controller suspend is allowed only when port is enabled.  But this
check is done in controller suspend routine.  Controller suspend is
attempted after root hub bus is suspended.  Even if we fail, controller
suspend, root hub bus remains in suspend state.  This would delay
the enumeration of HSIC device as root hub bus resume takes some time.

CRs-Fixed: 396444
Change-Id: I9cfdfb4beb458651fc81a3d22ad9ac79207514fd
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
gpu: ion: Use writecombine for uncached mappings

When we map ion buffers as uncached we want to map them as
uncached but still be able to use buffering of transactions
since turning off buffering has a severe performance impact.

Change-Id: I5a09ac34bd3ce3f001d10d9efd71d140f632564d
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
gpu: ion: Request highmem pages for IOMMU heap

When allocating pages for IOMMU heap it is advantageous
to try to allocate pages from highmem in addition to
lowmem since clients using the IOMMU heap can use
either highmem or lowmem.

CRs-fixed: 430457
Change-Id: Ifc794fc344c67dd53d8f7cebf86536ab9d44ed6c
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
hashtable: introduce a small and naive hashtable

This hashtable implementation is using hlist buckets to provide a simple
hashtable to prevent it from getting reimplemented all over the kernel.

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
[ Merging this now, so that subsystems can start applying Sasha's
  patches that use this   - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
block,elevator: use new hashtable implementation

Switch elevator to use the new hashtable implementation. This reduces the
amount of generic unrelated code in the elevator.

This also removes the dymanic allocation of the hash table. The size of the table is
constant so there's no point in paying the price of an extra dereference when accessing
it.

This patch depends on d9b482c ("hashtable: introduce a small and naive
hashtable") which was merged in v3.6.

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>