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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
Cc: <stable@vger.kernel.org>
Signed-off-by: Konstantin Khlebnikov <k.khlebnikov@samsung.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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To get updated __pv_phys_offset, setup_dma_zone() needs to be
called after early_paging_init().
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Current code is using PHYS_OFFSET to calculate the arm_dma_limit which
will lead to wrong calculations in cases where PHYS_OFFSET is updated
runtime.
So fix the code by using __pv_phys_offset instead of PHYS_OFFSET.
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Peter reports that OMAP audio broke with the recent fix for these
checks, caused by OMAP audio using a 64-bit DMA mask. We should
allow 64-bit DMA masks even with 32-bit dma_addr_t if we can be sure
the amount of RAM we have won't allow the 32-bit dma_addr_t to
overflow. Unfortunately, the checks to detect overflow were not
correct.
Tested-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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This patch correctly sets the dwNumOfPackets field of the HWA transfer
request for isochronous transfers with multiple segments. Previously
all segments used the value that was set for the first segment which may
not be correct.
Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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If multiple segments belonging to an isoc transfer are submitted
concurrently, the isoc_frame_index field in struct wa_xfer can get
corrupted. This patch moves the isoc_frame_index field from struct
wa_xfer to struct wa_seg to prevent this from happening.
Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Use USB_CTRL_SET_TIMEOUT and USB_CTRL_GET_TIMEOUT for USB control
messages instead of an arbitrary 1s timeout value. This is particularly
useful for WUSB since in the worst case RF scanario, a WUSB device can
be unresponsive for up to 4s and still be connected.
Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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There is no need to skip querying the config and string descriptors for
unauthorized WUSB devices when usb_new_device is called. It is allowed
by WUSB spec. The only action that needs to be delayed until
authorization time is the set config. This change allows user mode
tools to see the config and string descriptors earlier in enumeration
which is needed for some WUSB devices to function properly on Android
systems. It also reduces the amount of divergent code paths needed
for WUSB devices.
Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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In usb_submit_urb, do not fail if an isoc URB for a wireless USB device
has an interval < 6. Per WUSB spec, isoc endpoints can support values
from 1-16. Valid values for interrupt URBs for wireless USB devices are
still 6-16.
Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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If a URB is broken up into multiple transfer segments and a short
transfer occurs in any segment other than the last, the URB will
currently get stuck in the driver forever. This patch adds a check for
a short transfer and cleans up any pending segments so the URB can
complete properly.
Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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If we connect Male-A-To-Male-A cable between otg-host and host pc,
the ci->vbus_active is set wrongly, and cause the controller run
at peripheral mode when we load gadget module (ci_udc_start will be run),
but the software runs at host mode due to id = 0. The ehci_irq
can't handle suspend (USBi_SLI) interrupt which is enabled for
peripheral mode, it causes no one will handle irq error.
This patch is needed for 3.12 stable
Cc: stable <stable@vger.kernel.org>
Acked-by: Michael Grzeschik <mgr@pengutronix.de>
Reported-by: Marc Kleine-Budde <mkl@pengutronix.de>
Tested-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Commit 40ed51a4b (usb: chipidea: host: add vbus regulator
control) introduced a smatch complaint because regulator_disable() is called
without checking whether ci->platdata->reg_vbus is not NULL.
Fix this by adding the check.
This patch is needed for 3.12 stable
Cc: stable <stable@vger.kernel.org>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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ZTE AC2726 EVDO modem drops ppp connection every minute when driven by
zte_ev but works fine when driven by option. Move the support for AC2726
back to option driver.
Signed-off-by: Dmitry Kunilov <dmitry.kunilov@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Cc: stable <stable@vger.kernel.org>
Reported-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Acked-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Use usb_add_phy_dev instead of usb_add_phy, so that devices can
be bound to the phy. This is needed to set up USB phy for
some internal PCI USB host controllers on R-Car Gen2.
Signed-off-by: Valentine Barshak <valentine.barshak@cogentembedded.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-linus
Felipe writes:
usb: fixes for v3.13-rc4
DWC3 learned that it can't resume a PHY which wasn't
initialized and it also learned to not leave PHY powered
up in case of an error.
twl6030-usb PHY driver got a fix for a signedness bug in
twl6030_readb().
Tegra PHY driver got a bug fix where it could return success
even though there was an error.
Signed-of-by: Felipe Balbi <balbi@ti.com>
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When not aggregating packets, fi->framelen should be passed in as length
to calculate the duration. Before the tx path rework, ath_tx_fill_desc
was called for either one aggregate, or one single frame, with the
length of the packet or the aggregate as a parameter.
After the rework, ath_tx_sched_aggr can pass a burst of single frames to
ath_tx_fill_desc and sets len=0.
Fix broken duration calculation by overriding the length in ath_tx_fill_desc
before passing it to ath_buf_set_rate.
Cc: stable@vger.kernel.org
Reported-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
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present
commit dc75925d(OMAP: hwmod: Fix the missing braces) introduced
missing braces, however, we just set return result if clk_get fail
and we populate the error pointer in clk pointer and pass it along to
clk_prepare. This is wrong. The intent seems to be retry remaining
clocks if they are available and warn the ones we cant find clks for.
With the current logic, we see the following crash:
omap_hwmod: l3_main: cannot clk_get interface_clk emac_ick
Unable to handle kernel NULL pointer dereference at virtual address 00000032
pgd = c0004000
[00000032] *pgd=00000000
Internal error: Oops: 5 [#1] SMP ARM
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.13.0-rc1-00044-gcc9fd5a-dirty #19
task: ce0c3440 ti: ce0c4000 task.ti: ce0c4000
PC is at __clk_prepare+0x10/0x74
LR is at clk_prepare+0x14/0x24
<snip>
[<c044d59c>] (__clk_prepare+0x10/0x74) from [<c044d9b0>] (clk_prepare+0x14/0x24)
[<c044d9b0>] (clk_prepare+0x14/0x24) from [<c077d8c4>] (_init+0x24c/0x3bc)
[<c077d8c4>] (_init+0x24c/0x3bc) from [<c0027328>] (omap_hwmod_for_each+0x34/0x5c)
[<c0027328>] (omap_hwmod_for_each+0x34/0x5c) from [<c077dfa0>] (__omap_hwmod_setup_all+0x24/0x40)
[<c077dfa0>] (__omap_hwmod_setup_all+0x24/0x40) from [<c0008928>] (do_one_initcall+0x38/0x168)
[<c0008928>] (do_one_initcall+0x38/0x168) from [<c0771be8>] (kernel_init_freeable+0xfc/0x1cc)
[<c0771be8>] (kernel_init_freeable+0xfc/0x1cc) from [<c0521064>] (kernel_init+0x8/0x110)
[<c0521064>] (kernel_init+0x8/0x110) from [<c000e568>] (ret_from_fork+0x14/0x2c)
Code: e92d4038 e2504000 01a05004 0a000005 (e5943034)
So, just warn and continue instead of proceeding and crashing, with
missing clock nodes/bad data, we will eventually fail, however we
should now have enough information to identify the culprit.
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
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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 <rogerq@ti.com>
Tested-by: Tomi Valkeinen <tomi.valkeinen@ti.com> # Panda, BeagleXM
Fixes: de231388cb80 ("ARM: OMAP: USB: EHCI and OHCI hwmod structures for OMAP3")
Signed-off-by: Paul Walmsley <paul@pwsan.com>
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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 <rogerq@ti.com>
Tested-by: Tomi Valkeinen <tomi.valkeinen@ti.com> # Panda, BeagleXM
[paul@pwsan.com: renamed _clr_softreset() to _clear_softreset()]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
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If snd_dmaengine_pcm_register()'s call to snd_soc_add_platform() fails,
all objects allocated during registration are leaked. Fix this by adding
error-handling code.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
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If we update it here, the set_bias_level() of Codec driver won't be normally
called and we will then miss some essential procedures in set_bias_level() of
the Codec driver. Thus drop it.
Signed-off-by: Nicolin Chen <b42378@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
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Pull drm fixes from Dave Airlie:
"This is probably a bit big, but just because I fell behind last week
and didn't get to doing any pulls, so stuff backed up behind me, I
actually should have sent this for -rc3 but failed to even manage
that.
So this has radeon, intel, nouveau, vmware, exynos and tegra fixes in
it, and the line count isn't all the bad in the end"
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (50 commits)
drm: fix the addition of the side-by-side (half) flag for extra 3D modes
drm/edid: fix length check when adding extra 3D modes
drm/radeon/atom: fix bus probes when hw_i2c is set (v2)
drm/radeon: fix null pointer dereference in dce6+ audio code
drm/radeon: fixup bad vram size on SI
udl: fix issue with imported prime buffers
drm/vmwgfx: Add our connectors to sysfs
drm/vmwgfx: Fix dma buffer memory size accounting
drm/vmwgfx: Fix up and comment the dumb buffer implementation
drm/vmwgfx: Correctly set the enabled state on crtcs
drm/nv50/disp: min/max are reversed in nv50_crtc_gamma_set()
drm/nouveau/sw: fix oops if gpu has its display block disabled
drm/nouveau: unreference fence after syncing
drm/nouveau/kms: send timestamp data for correct head in flip completion events
drm/nouveau/clk: Add support for NVAA/NVAC
drm/nouveau/fifo: Hook up pause and resume for NV50 and NV84+
drm/nv10/plane: some chipsets don't support NV12
drm/nv10/plane: add downscaling restrictions
drm/nv10/plane: fix format computation
drm/nv04-nv30/clk: provide an empty domain list
...
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git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-fixes
Pull mfd fixes from Samuel Ortiz:
"This is the first 3.13 pull request for MFD fixes. We have:
- A ti-ssp build failure fix
- An as3722 build failure fix
- An lpc_ich copy paste error fix"
* tag 'mfd-fixes-3.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-fixes:
mfd: lpc_ich: Fix Wildcat Point info name field
mfd: ti-ssp: Fix build
mfd: Make MFD_AS3722 depend on I2C=y
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixup from Rafael Wysocki:
"This reverts two cpufreq commits that fixed issues for some people,
but broke things for others, so revert them and we'll need to fix the
original problems differently"
* tag 'pm-3.13-rc3-fixup' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
Revert "cpufreq: fix garbage kobjects on errors during suspend/resume"
Revert "cpufreq: suspend governors on system suspend/hibernate"
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git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull input updates from Dmitry Torokhov:
"An update to ALPS to support devices on Dell XT2 (hopefully working
better this time around and although it is largish it should not
affect any other ALPS devices) and a tiny update to Elantech driver to
support newer devices as well.
Also a coupe of new input event codes have been defined"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: ALPS - add support for DualPoint device on Dell XT2 model
Input: elantech - add support for newer (August 2013) devices
Input: add SW_MUTE_DEVICE switch definition
Input: usbtouchscreen - separate report and transmit buffer size handling
Input: sur40 - suppress false uninitialized variable warning
Input: add key code for ambient light sensor button
Input: keyboard - "keycode & KEY_MAX" changes some keycode values
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Pull crypto fix from Herbert Xu:
"Unfortunately the last push that fixed a crash in the crypto
scatterwalk code introduced a new crash when SG debugging is enabled.
This fixes that"
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: scatterwalk - Use sg_chain_ptr on chain entries
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prior to week 08 of 2013 Freescale misprogrammed between 1 and 3% of
PFUZE1000 parts with a ID=0x8 instead of the expected ID=0x0
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Cc: stable@vger.kernel.org
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According to the datasheet, the address of FABID is 0x4. Fix it.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Robin Gong <b38343@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Cc: stable@vger.kernel.org
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In tegra*_i2s_set_fmt(), in the (fmt == SND_SOC_DAIFMT_CBM_CFM) case,
"val" is never assigned to, but left uninitialized. The other case does
initialized it. Fix this by initializing val at the start of the
function, and only ever ORing into it.
Update the handling of "mask" so it works the same way for consistency.
Update tegra20_spdif.c to use the same code-style for consistency, even
though it doesn't happen to suffer from the same problem at present.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Fixes: 0f163546a772 ("ASoC: tegra: use regmap more directly")
Cc: <stable@vger.kernel.org>
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'of_match_ptr' is defined in linux/of.h. Include it explicitly to
avoid build breakage in the future.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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i2c i2c-6: adapter [RTL2830 tuner I2C adapter] registered
BUG: unable to handle kernel NULL pointer dereference at 0000000000000220
IP: [<ffffffffa0002900>] i2c_register_adapter+0x130/0x390 [i2c_core]
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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This patch uses devm to release the clks instead of releasing
manually.
And it adds enable/disable mipi_clk when getting its rate.
Signed-off-by: Libin Yang <lbyang@marvell.com>
Acked-by: Jonathan Corbet <corbet@lwn.net>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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git grep shows that the function is only called from ths7303.c
Fix this build warning:
CC drivers/media/i2c/ths7303.o
drivers/media/i2c/ths7303.c:86:5: warning: no previous prototype for ‘ths7303_setval’ [-Wmissing-prototypes]
int ths7303_setval(struct v4l2_subdev *sd, enum ths7303_filter_mode mode)
^
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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vb2_fop_release might take the video queue mutex lock.
In order to avoid nesting mutexes the private mutex is taken after the
fop_release has finished.
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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Signed-off-by: Georg Kaindl <gkaindl@mac.com>
Tested-by: Lubomir Rintel <lkundrak@v3.sk>
Tested-by: Marcin Nowak <marcin.nowak@simplusnet.pl>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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Fix various spelling errors in strings and comments throughout the media
tree. The majority of these were found using Lucas De Marchi's codespell
tool.
[m.chehab@samsung.com: discard hunks with conflicts]
Signed-off-by: Jonathan McCrohan <jmccrohan@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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Currently it is not possible for userspace to map a DMABUF exported buffer
with write permissions. This patch allows to also pass O_RDONLY/O_RDWR when
exporting the buffer, so that userspace may map it with write permissions.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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This mirrors the patch to the radio-shark driver by Geert Uytterhoeven.
If SHARK_USE_LEDS=1, but CONFIG_PM=n:
drivers/media/radio/radio-shark2.c:240: warning: ‘shark_resume_leds’ defined but not used
Instead of making the #ifdef logic even more complicated (there are already
two definitions of shark_resume_leds()), mark shark_resume_leds() inline to
kill the compiler warning. shark_resume_leds() is small and it has only one
caller.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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If SHARK_USE_LEDS=1, but CONFIG_PM=n:
drivers/media/radio/radio-shark.c:275: warning: ‘shark_resume_leds’ defined but not used
Instead of making the #ifdef logic even more complicated (there are already
two definitions of shark_resume_leds()), mark shark_resume_leds() inline to
kill the compiler warning. shark_resume_leds() is small and it has only one
caller.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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the lock was only taken inside the hardirq
handler, which runs with IRQs disabled. There's
no chance of any race condition happening, even
on SMP machines. It's safe to remove that
spinlock.
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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Fix kernel warning and failure to register sensor hub devices with MFD. Now
many devices has in-built sensor hubs. So by default this HID hub, is properly
parsed and register individual sensors as platform device using MFD framework.
But if a second sensor hub is attached via USB, which has same sensors, it will
result in kernel warning and failure to register MFD cell as the platform
device sysfs file name will be same as created by in-built sensor hubs. This
patch sets MFD cell id to PLATFORM_DEVID_AUTO. In this way there will never be
duplicate sysfs file names.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Now that scatterwalk_sg_chain sets the chain pointer bit the sg_page
call in scatterwalk_sg_next hits a BUG_ON when CONFIG_DEBUG_SG is
enabled. Use sg_chain_ptr instead of sg_page on a chain entry.
Cc: stable@vger.kernel.org
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Without this, the USB devices are sometimes not detected on OMAP4 Panda
with u-boot v2013.10.
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.
Reported-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Tested-by: Tomi Valkeinen <tomi.valkeinen@ti.com> # Panda, BeagleXM
Acked-by: Benoît Cousson <bcousson@baylibre.com>
Fixes: af88fa9aa77c ("ARM: OMAP: USB: EHCI and OHCI hwmod structures for OMAP4")
Signed-off-by: Paul Walmsley <paul@pwsan.com>
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Now that the svcpu sync is interrupt aware we can enable interrupts
earlier in the exit code path again, moving 32bit and 64bit closer
together.
While at it, document the fact that we're always executing the exit
path with interrupts enabled so that the next person doesn't trap
over this.
Signed-off-by: Alexander Graf <agraf@suse.de>
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As soon as we get back to our "highmem" handler in virtual address
space we may get preempted. Today the reason we can get preempted is
that we replay interrupts and all the lazy logic thinks we have
interrupts enabled.
However, it's not hard to make the code interruptible and that way
we can enable and handle interrupts even earlier.
This fixes random guest crashes that happened with CONFIG_PREEMPT=y
for me.
Signed-off-by: Alexander Graf <agraf@suse.de>
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The kvmppc_copy_{to,from}_svcpu functions are publically visible,
so we should also export them in a header for others C files to
consume.
So far we didn't need this because we only called it from asm code.
The next patch will introduce a C caller.
Signed-off-by: Alexander Graf <agraf@suse.de>
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We call a C helper to save all svcpu fields into our vcpu. The C
ABI states that r12 is considered volatile. However, we keep our
exit handler id in r12 currently.
So we need to save it away into a non-volatile register instead
that definitely does get preserved across the C call.
This bug usually didn't hit anyone yet since gcc is smart enough
to generate code that doesn't even need r12 which means it stayed
identical throughout the call by sheer luck. But we can't rely on
that.
Signed-off-by: Alexander Graf <agraf@suse.de>
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Userspace uses this to workaround overcommit issues
by flushing the command stream early.
Signed-off-by: Jakob Bornecrantz <jakob@vmware.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty fix from Greg KH:
"Here is a single n_tty fix for 3.13-rc3 that resolves a regression in
3.12 that has been reported"
* tag 'tty-3.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
n_tty: Fix missing newline echo
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