cfq-iosched: Fix null pointer dereference

NULL pointer dereference can happen in cfq_choose_cfqg()
when there are no cfq groups to select other than the
current serving group. Prevent this by adding a NULL
check before dereferencing.

Unable to handle kernel NULL pointer dereference at virtual address
[<c02502cc>] (cfq_dispatch_requests+0x368/0x8c0) from
[<c0243f30>] (blk_peek_request+0x220/0x25c)
[<c0243f30>] (blk_peek_request+0x220/0x25c) from
[<c0243f74>] (blk_fetch_request+0x8/0x1c)
[<c0243f74>] (blk_fetch_request+0x8/0x1c) from
[<c041cedc>] (mmc_queue_thread+0x58/0x120)
[<c041cedc>] (mmc_queue_thread+0x58/0x120) from
[<c00ad310>] (kthread+0x84/0x90)
[<c00ad310>] (kthread+0x84/0x90) from
[<c000eeac>] (kernel_thread_exit+0x0/0x8)

CRs-Fixed: 416466
Change-Id: I1fab93a4334b53e1d7c5dcc8f93cff174bae0d5e
Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org>
blx: Battery Life eXtender (BLX)

This is a simple port of Ezekeel's BLX mod to the Nexus 4.

See this thread for more information: http://forum.xda-developers.com/showthread.php?t=1257497

Let's keep the same sysfs implementation so that apps, such as Trickster MOD, can support this.

Conflicts:
	drivers/misc/Makefile
blx: Change the max charge to 100
msm: msm_fb: Add range checks for fb cmap.

Add appropriate range checks to ensure valid access
through framebuffer cmap. This prevents illegal
access into memory.

Change-Id: I9e82a27a2d12f31d8150ea577514576824f8b1f5
Signed-off-by: Vishnuvardhan Prodduturi <vproddut@codeaurora.org>
Signed-off-by: Francisco Franco <franciscofranco.1990@gmail.com>
msm_fb: Set RR sched policy for Glupdator thread

Set Round Robin Scheduling policy for GLUpdator
thread to improve performance.

Change-Id: I637ca364d325d6c847c73e8eec403e76094d93c5
Signed-off-by: Kalyan Thota <kalyant@codeaurora.org>
Signed-off-by: Ken Zhang <kenz@codeaurora.org>
Signed-off-by: Francisco Franco <franciscofranco.1990@gmail.com>
msm: msm_fb: remove mmio access through mmap

Disable access to mm io and add
appropriate range checks to ensure valid accesses
through framebuffer mmap. This prevents illegal
access into memory.

CRs-Fixed: 474706
Change-Id: If25166f2732433ef967e99c716440030b567aae9
Signed-off-by: Manoj Rao <manojraj@codeaurora.org>
Signed-off-by: Francisco Franco <franciscofranco.1990@gmail.com>
Prima 144a
Prima 145