linux-stable.git/arch/arm, branch v3.4.83

ARM: 7957/1: add DSB after icache flush in __flush_icache_all()

2014-03-11T23:09:57+00:00

commit 39544ac9df20f73e49fc6b9ac19ff533388c82c0 upstream.

Add DSB after icache flush to complete the cache maintenance operation.

Signed-off-by: Vinayak Kale 
Acked-by: Catalin Marinas 
Signed-off-by: Russell King 
Signed-off-by: Greg Kroah-Hartman

ARM: 7953/1: mm: ensure TLB invalidation is complete before enabling MMU

2014-03-11T23:09:57+00:00

commit bae0ca2bc550d1ec6a118fb8f2696f18c4da3d8e upstream.

During __v{6,7}_setup, we invalidate the TLBs since we are about to
enable the MMU on return to head.S. Unfortunately, without a subsequent
dsb instruction, the invalidation is not guaranteed to have completed by
the time we write to the sctlr, potentially exposing us to junk/stale
translations cached in the TLB.

This patch reworks the init functions so that the dsb used to ensure
completion of cache/predictor maintenance is also used to ensure
completion of the TLB invalidation.

Reported-by: Albin Tonnerre 
Signed-off-by: Will Deacon 
Signed-off-by: Russell King 
Signed-off-by: Greg Kroah-Hartman

ARM: at91: smc: bug fix in sam9_smc_cs_read()

2014-02-06T19:05:47+00:00

commit 1588c51cf6d782e63a8719681d905ef0ac22ee62 upstream.

There was a copy/paste error when reading the nwe_pulse value.

Signed-off-by: Jean-Jacques Hiblot 
Acked-by: Boris BREZILLON 
Signed-off-by: Nicolas Ferre 
Signed-off-by: Kevin Hilman 
Signed-off-by: Greg Kroah-Hartman

ARM: shmobile: mackerel: Fix coherent DMA mask

2014-01-15T23:27:11+00:00

commit b6328a6b7ba57fc84c38248f6f0e387e1170f1a8 upstream.

Commit 4dcfa60071b3d23f0181f27d8519f12e37cefbb9 ("ARM: DMA-API: better
handing of DMA masks for coherent allocations") added an additional
check to the coherent DMA mask that results in an error when the mask is
larger than what dma_addr_t can address.

Set the LCDC coherent DMA mask to DMA_BIT_MASK(32) instead of ~0 to fix
the problem.

Signed-off-by: Laurent Pinchart 
Signed-off-by: Simon Horman 
Signed-off-by: Greg Kroah-Hartman

ARM: fix "bad mode in ... handler" message for undefined instructions

2014-01-15T23:27:11+00:00

commit 29c350bf28da333e41e30497b649fe335712a2ab upstream.

The array was missing the final entry for the undefined instruction
exception handler; this commit adds it.

Signed-off-by: Russell King 
Signed-off-by: Greg Kroah-Hartman

ARM: OMAP2+: hwmod: Fix SOFTRESET logic

2013-12-20T15:34:21+00:00

commit 313a76ee11cda6700548afe68499ef174a240688 upstream.

In _ocp_softreset(), after _set_softreset() + write_sysconfig(),
the hwmod's sysc_cache will always contain SOFTRESET bit set
so all further writes to sysconfig using this cache will initiate
a repeated SOFTRESET e.g. enable_sysc(). This is true for OMAP3 like
platforms that have RESET_DONE status in the SYSSTATUS register and
so the the SOFTRESET bit in SYSCONFIG is not automatically cleared.
It is not a problem for OMAP4 like platforms that indicate RESET
completion by clearing the SOFTRESET bit in the SYSCONFIG register.

This repeated SOFTRESET is undesired and was the root cause of
USB host issues on OMAP3 platforms when hwmod was allowed to do the
SOFTRESET for the USB Host module.

To fix this we clear the SOFTRESET bit and update the sysconfig
register + sysc_cache using write_sysconfig().

Signed-off-by: Roger Quadros 
Tested-by: Tomi Valkeinen  # Panda, BeagleXM
[paul@pwsan.com: renamed _clr_softreset() to _clear_softreset()]
Signed-off-by: Paul Walmsley 
Signed-off-by: Greg Kroah-Hartman

ARM: 7913/1: fix framepointer check in unwind_frame

2013-12-20T15:34:19+00:00

commit 3abb6671a9c04479c4bd026798a05f857393b7e2 upstream.

This patch fixes corner case when (fp + 4) overflows unsigned long,
for example: fp = 0xFFFFFFFF -> fp + 4 == 3.

Signed-off-by: Konstantin Khlebnikov 
Signed-off-by: Russell King 
Signed-off-by: Greg Kroah-Hartman

ARM: 7912/1: check stack pointer in get_wchan

2013-12-20T15:34:19+00:00

commit 1b15ec7a7427d4188ba91b9bbac696250a059d22 upstream.

get_wchan() is lockless. Task may wakeup at any time and change its own stack,
thus each next stack frame may be overwritten and filled with random stuff.

/proc/$pid/stack interface had been disabled for non-current tasks, see [1]
But 'wchan' still allows to trigger stack frame unwinding on volatile stack.

This patch fixes oops in unwind_frame() by adding stack pointer validation on
each step (as x86 code do), unwind_frame() already checks frame pointer.

Also I've found another report of this oops on stackoverflow (irony).

Link: http://www.spinics.net/lists/arm-kernel/msg110589.html [1]
Link: http://stackoverflow.com/questions/18479894/unwind-frame-cause-a-kernel-paging-error

Signed-off-by: Konstantin Khlebnikov 
Acked-by: Will Deacon 
Signed-off-by: Russell King 
Signed-off-by: Greg Kroah-Hartman

ARM: OMAP3: hwmod data: Don't prevent RESET of USB Host module

2013-12-20T15:34:19+00:00

commit 7f4d3641e2548d1ac5dee837ff434df668a2810c upstream.

Unlike what the comment states, errata i660 does not state that we
can't RESET the USB host module. Instead it states that RESET is the
only way to recover from a deadlock situation.

RESET ensures that the module is in a known good state irrespective
of what bootloader does with the module, so it must be done at boot.

Signed-off-by: Roger Quadros 
Tested-by: Tomi Valkeinen  # Panda, BeagleXM
Fixes: de231388cb80 ("ARM: OMAP: USB: EHCI and OHCI hwmod structures for OMAP3")
Signed-off-by: Paul Walmsley 
Signed-off-by: Greg Kroah-Hartman

ARM: pxa: tosa: fix keys mapping

2013-12-20T15:34:19+00:00

commit 506cac15ac86f204b83e3cfccde73eeb4e7c5f34 upstream.

When converting from tosa-keyboard driver to matrix keyboard, tosa keys
received extra 1 column shift. Replace that with correct values to make
keyboard work again.

Fixes: f69a6548c9d5 ('[ARM] pxa/tosa: make use of the matrix keypad driver')
Signed-off-by: Dmitry Eremin-Solenikov 
Signed-off-by: Haojian Zhuang 
Signed-off-by: Olof Johansson 
Signed-off-by: Greg Kroah-Hartman