This includes some fixes for vhost net and scsi drivers.
The test module has already been reworked to avoid rcu
usage, but the necessary core changes are missing,
we fixed this.
Unlikely to affect any real-world users, but it's
early in the cycle so, let's merge them.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull vhost fixes from Michael Tsirkin:
"vhost: more fixes for 3.11
This includes some fixes for vhost net and scsi drivers.
The test module has already been reworked to avoid rcu usage, but the
necessary core changes are missing, we fixed this.
Unlikely to affect any real-world users, but it's early in the cycle
so, let's merge them"
(It was earlier when Michael originally sent the email, but it somehot
got missed in the flood, so here it is after -rc2)
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
vhost: Remove custom vhost rcu usage
vhost-scsi: Always access vq->private_data under vq mutex
vhost-net: Always access vq->private_data under vq mutex
`do_cmd_ioctl()` is called with the comedi device's mutex locked to
process the `COMEDI_CMD` ioctl to set up comedi's asynchronous command
handling on a comedi subdevice. `comedi_read()` and `comedi_write()`
are the `read` and `write` handlers for the comedi device, but do not
lock the mutex (for performance reasons, as some things can hold the
mutex for quite a long time).
There is a race condition if `comedi_read()` or `comedi_write()` is
running at the same time and for the same file object and comedi
subdevice as `do_cmd_ioctl()`. `do_cmd_ioctl()` sets the subdevice's
`busy` pointer to the file object way before it sets the `SRF_RUNNING` flag
in the subdevice's `runflags` member. `comedi_read() and
`comedi_write()` check the subdevice's `busy` pointer is pointing to the
current file object, then if the `SRF_RUNNING` flag is not set, will call
`do_become_nonbusy()` to shut down the asyncronous command. Bad things
can happen if the asynchronous command is being shutdown and set up at
the same time.
To prevent the race, don't set the `busy` pointer until
after the `SRF_RUNNING` flag has been set. Also, make sure the mutex is
held in `comedi_read()` and `comedi_write()` while calling
`do_become_nonbusy()` in order to avoid moving the race condition to a
point within that function.
Change some error handling `goto cleanup` statements in `do_cmd_ioctl()`
to simple `return -ERRFOO` statements as a result of changing when the
`busy` pointer is set.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Comedi devices can do blocking read() or write() (or poll()) if an
asynchronous command has been set up, blocking for data (for read()) or
buffer space (for write()). Various events associated with the
asynchronous command will wake up the blocked reader or writer (or
poller). It is also possible to force the asynchronous command to
terminate by issuing a `COMEDI_CANCEL` ioctl. That shuts down the
asynchronous command, but does not currently wake up the blocked reader
or writer (or poller). If the blocked task could be woken up, it would
see that the command is no longer active and return. The caller of the
`COMEDI_CANCEL` ioctl could attempt to wake up the blocked task by
sending a signal, but that's a nasty workaround.
Change `do_cancel_ioctl()` to wake up the wait queue after it returns
from `do_cancel()`. `do_cancel()` can propagate an error return value
from the low-level comedi driver's cancel routine, but it always shuts
the command down regardless, so `do_cancel_ioctl()` can wake up he wait
queue regardless of the return value from `do_cancel()`.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The calculation of the attribute length was 4 bytes off.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Tested-by: Andre Heider <a.heider@gmail.com>
Reported-and-tested-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
CONFIG_USB_EHCI_MXC selects the old i.mx USB driver, which does not support
device tree.
Select the USB chipidea driver instead, so that USB can be functional on i.mx.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
The em_x270_mci_setpower() and em_x270_usb_hub_init() functions
call regulator_enable(), which may return an error that must
be checked.
This changes the em_x270_usb_hub_init() function to bail out
if it fails, and changes the pxamci_platform_data->setpower
callback so that the a failed em_x270_mci_setpower call
can be propagated by the pxamci driver into the mmc core.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Mike Rapoport <mike@compulab.co.il>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Haojian Zhuang <haojian.zhuang@gmail.com>
Acked-by: Chris Ball <cjb@laptop.org>
[olof: fixed order of regulator_enable() and test in em_x270_usb_hub_init]
Signed-off-by: Olof Johansson <olof@lixom.net>
Fix the following compilation warning:
arch/arm/mach-zynq/common.c:110:2: warning: initialization from incompatible pointer type [enabled by default]
arch/arm/mach-zynq/common.c:110:2: warning: (near initialization for ‘__mach_desc_XILINX_EP107.restart’) [enabled by default]
Signed-off-by: Vincent Stehlé <vincent.stehle@freescale.com>
Cc: Robin Holt <holt@sgi.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: trivial@kernel.org
Signed-off-by: Olof Johansson <olof@lixom.net>
Fix the following compilation warning:
arch/arm/mach-keystone/keystone.c:74:2: warning: initialization from incompatible pointer type [enabled by default]
arch/arm/mach-keystone/keystone.c:74:2: warning: (near initialization for ‘__mach_desc_KEYSTONE.restart’) [enabled by default]
Signed-off-by: Vincent Stehlé <vincent.stehle@freescale.com>
Cc: Robin Holt <holt@sgi.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: trivial@kernel.org
Signed-off-by: Olof Johansson <olof@lixom.net>
The following call chain:
------------------------------------------------------------
nfs4_get_vfs_file
- nfsd_open
- dentry_open
- do_dentry_open
- __get_file_write_access
- get_write_access
- return atomic_inc_unless_negative(&inode->i_writecount) ? 0 : -ETXTBSY;
------------------------------------------------------------
can result in the following state:
------------------------------------------------------------
struct nfs4_file {
...
fi_fds = {0xffff880c1fa65c80, 0xffffffffffffffe6, 0x0},
fi_access = {{
counter = 0x1
}, {
counter = 0x0
}},
...
------------------------------------------------------------
1) First time around, in nfs4_get_vfs_file() fp->fi_fds[O_WRONLY] is
NULL, hence nfsd_open() is called where we get status set to an error
and fp->fi_fds[O_WRONLY] to -ETXTBSY. Thus we do not reach
nfs4_file_get_access() and fi_access[O_WRONLY] is not incremented.
2) Second time around, in nfs4_get_vfs_file() fp->fi_fds[O_WRONLY] is
NOT NULL (-ETXTBSY), so nfsd_open() is NOT called, but
nfs4_file_get_access() IS called and fi_access[O_WRONLY] is incremented.
Thus we leave a landmine in the form of the nfs4_file data structure in
an incorrect state.
3) Eventually, when __nfs4_file_put_access() is called it finds
fi_access[O_WRONLY] being non-zero, it decrements it and calls
nfs4_file_put_fd() which tries to fput -ETXTBSY.
------------------------------------------------------------
...
[exception RIP: fput+0x9]
RIP: ffffffff81177fa9 RSP: ffff88062e365c90 RFLAGS: 00010282
RAX: ffff880c2b3d99cc RBX: ffff880c2b3d9978 RCX: 0000000000000002
RDX: dead000000100101 RSI: 0000000000000001 RDI: ffffffffffffffe6
RBP: ffff88062e365c90 R8: ffff88041fe797d8 R9: ffff88062e365d58
R10: 0000000000000008 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000007 R14: 0000000000000000 R15: 0000000000000000
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
#9 [ffff88062e365c98] __nfs4_file_put_access at ffffffffa0562334 [nfsd]
#10 [ffff88062e365cc8] nfs4_file_put_access at ffffffffa05623ab [nfsd]
#11 [ffff88062e365ce8] free_generic_stateid at ffffffffa056634d [nfsd]
#12 [ffff88062e365d18] release_open_stateid at ffffffffa0566e4b [nfsd]
#13 [ffff88062e365d38] nfsd4_close at ffffffffa0567401 [nfsd]
#14 [ffff88062e365d88] nfsd4_proc_compound at ffffffffa0557f28 [nfsd]
#15 [ffff88062e365dd8] nfsd_dispatch at ffffffffa054543e [nfsd]
#16 [ffff88062e365e18] svc_process_common at ffffffffa04ba5a4 [sunrpc]
#17 [ffff88062e365e98] svc_process at ffffffffa04babe0 [sunrpc]
#18 [ffff88062e365eb8] nfsd at ffffffffa0545b62 [nfsd]
#19 [ffff88062e365ee8] kthread at ffffffff81090886
#20 [ffff88062e365f48] kernel_thread at ffffffff8100c14a
------------------------------------------------------------
Cc: stable@vger.kernel.org
Signed-off-by: Harshula Jayasuriya <harshula@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
sd_prep_fn will allocate a larger CDB for the command via mempool_alloc
for devices using DIF type 2 protection. This CDB was being freed
in sd_done, which results in a kernel crash if the command is retried
due to a UNIT ATTENTION. This change moves the code to free the larger
CDB into sd_unprep_fn instead, which is invoked after the request is
complete.
It is no longer necessary to call scsi_print_command separately for
this case as the ->cmnd will no longer be NULL in the normal code path.
Also removed conditional test for DIF type 2 when freeing the larger
CDB because the protection_type could have been changed via sysfs while
the command was executing.
Signed-off-by: Ewan D. Milne <emilne@redhat.com>
Acked-by: Martin K. Petersen <martin.petersen@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
commit b29900e6 (AHCI: Make distinct names for ports in /proc/interrupts)
introuded a regression, which resulted Null pointer dereference for achi
host with dummy ports. For ahci ports, when the port is dummy port, its
private_data will be NULL, as ata_dummy_port_ops doesn't support ->port_start.
changes in v2: use pp to check dummy ports, update comments
Reported-and-tested-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Xiaotian Feng <xtfeng@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Alexander Gordeev <agordeev@redhat.com>
Cc: linux-ide@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
This fixes a regression where Xyratex controllers and disks were lost by the
driver:
https://bugzilla.kernel.org/show_bug.cgi?id=59601
Reported-by: Jack Hill <jackhill@jackhill.us>
Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit fixes a race condition in the isci driver abort task and SSP
device task management path. The race is caused when an I/O termination
in the SCU hardware is necessary because of an SSP target timeout condition,
and the check of the I/O end state races against the HW-termination-driven
end state. The failure of the race meant that no TMF was sent to the device
to clean-up the pending I/O.
Signed-off-by: Jeff Skirvin <jeffrey.d.skirvin@intel.com>
Reviewed-by: Lukasz Dorau <lukasz.dorau@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
All users of it are now gone!
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@gmail.com>
Last driver and pretty obviously a major user of this little function.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@gmail.com>
Again just use the version provided by the linux core.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@gmail.com>
The version offered by the core is ridiculously optimized and
does the same thing. So use it.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@gmail.com>
It fiddles the sarea out of the maps which are also handled in
drm_bufs.c
With this drm_drv.c is a notch more legacy free.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@gmail.com>
Commit ff70130 (arm64: use common reboot infrastructure) converted the
arm_pm_restart declaration to the new reboot infrastructure but missed
the actual definition.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Secondary CPUs write to __boot_cpu_mode with caches disabled, and thus a
cached value of __boot_cpu_mode may be incoherent with that in memory.
This could lead to a failure to detect mismatched boot modes.
This patch adds flushing to ensure that writes by secondaries to
__boot_cpu_mode are made visible before we test against it.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Christoffer Dall <cdall@cs.columbia.edu>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
It's unused, everyone is using the _unlocked variant only.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Dave Airlie <airlied@gmail.com>
drm_gem_object_init() and drm_gem_private_object_init() do exactly the
same (except for shmem alloc) so make the first use the latter to reduce
code duplication.
Also drop the return code from drm_gem_private_object_init(). It seems
unlikely that we will extend it any time soon so no reason to keep it
around. This simplifies code paths in drivers, too.
Last but not least, fix gma500 to call drm_gem_object_release() before
freeing objects that were allocated via drm_gem_private_object_init().
That isn't actually necessary for now, but might be in the future.
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Acked-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Dave Airlie <airlied@gmail.com>
Only ever re-cleared in drm_setup, otherwise completely unused.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@gmail.com>
There's no other caller from driver code, so we can fold this in.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@gmail.com>
Really, this is all old-style stuff and just copy-pasta from the
ums driver.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@gmail.com>
The former doesn't do anything without DRIVER_HAVE_DMA (which is
force-disabled for kms drivers anyway). The latter isn't used by the
(kms) nouveau ddx.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@gmail.com>
No need to create a dummy ioctl function to return -EINVAL, since
that's what the core already does in the absence of the dma_ioctl
callback. So we can safely remove this.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@gmail.com>
Only ever assigned in the context code for real, with no readers
anywhere. Remove it.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@gmail.com>
No one ever waits on this waitqueue, so the wake_up call is wasted.
Remove it all.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@gmail.com>
In
commit 325b9d0488
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Fri Apr 19 11:24:33 2013 +0200
drm/i915: fixup 12bpc hdmi dotclock handling
I've errornously claimed that we don't yet support the hdmi 1.4
dotclocks > 225 MHz on Haswell. But a bug report and a closer look at
the wrpll table showed that we've supported port clocks up to 300MHz.
With the new code to dynamically compute wrpll limits we should have
no issues going up to the full 340 MHz range of hdmi 1.4, so let's
just use that to fix this regression. That'll allow 4k over hdmi for
free!
v2: Drop the random hunk that somehow slipped in.
v3: Cantiga has the original HDMI dotclock limit of 165MHz. And also
patch up the mode filtering. To do so extract the dotclock limits into
a little helper function.
v4: Use 300MHz (from Bspec) instead of 340MHz (upper limit for hdmi
1.3), apparently hw is not required to be able to drive the highest
dotclocks. Suggested by Damien.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=67048
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=67030
Tested-by: Andreas Reis <andreas.reis@gmail.com> (v2)
Cc: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Midway adds new register fields to the coherency control registers, so
writing absolute values will break on Midway. Change the register
accesses to only modify the necessary and common fields in order to
support both Midway and Highbank.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
- Update the baseline so we need not rely on make
oldconfig so much
- MMC defconfig updates
- Activate NO_HZ_IDLE and HRTIMERS
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Merge tag 'nomadik-defconfig-for-arm-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik into fixes
From Linus Walleij:
This updates the Nomadik defconfig post-v3.11-rc1:
- Update the baseline so we need not rely on make
oldconfig so much
- MMC defconfig updates
- Activate NO_HZ_IDLE and HRTIMERS
* tag 'nomadik-defconfig-for-arm-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik:
ARM: nomadik: configure for NO_HZ and HRTIMERS
ARM: nomadik: update defconfig base
ARM: nomadik: Update MMC defconfigs
Signed-off-by: Olof Johansson <olof@lixom.net>
Commit 8ef6e6201b (ARM: footbridge: use
fixed PCI i/o mapping) broke booting on my netwinder. Before that,
everything boots fine. Since then, it crashes on boot.
With earlyprintk, I see it BUG-ing like so:
kernel BUG at lib/ioremap.c:27!
Internal error: Oops - BUG: 0 [#1] ARM
...
[<c0139b54>] (ioremap_page_range+0x128/0x154) from [<c02e6a6c>] (dc21285_setup+0xd0/0x114)
[<c02e6a6c>] (dc21285_setup+0xd0/0x114) from [<c02e4874>] (pci_common_init+0xa0/0x298)
[<c02e4874>] (pci_common_init+0xa0/0x298) from [<c02e793c>] (netwinder_pci_init+0xc/0x18)
[<c02e793c>] (netwinder_pci_init+0xc/0x18) from [<c02e27d0>] (do_one_initcall+0xb4/0x180)
...
Russell points out it's because of overlapping PCI mappings that was
added with the aforementioned commit. Rob thought the code would re-use
the static mapping, but that turns out to not be the case and instead
hits the BUG further down.
After deleting this hunk as suggested by Russel, the system boots up fine
again and all my PCI devices work (IDE, ethernet, the DC21285).
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Cc: stable@vger.kernel.org # v3.5+
Signed-off-by: Olof Johansson <olof@lixom.net>
* A few device tree source fixes regarding pinctrl, clock, and pwm
backlight.
* Fixes imx28 and imx51 audio driver failure caused by sgtl5000 codec
driver change by supplying the correct clock for codec.
* imx6q emi_sel clock muxing and imx6q-iomuxc-gpr macro fixes
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Merge tag 'imx-fixes-3.11' of git://git.linaro.org/people/shawnguo/linux-2.6 into fixes
From Shawn Guo, imx fixes for 3.11:
- A few device tree source fixes regarding pinctrl, clock, and pwm
backlight.
- Fixes imx28 and imx51 audio driver failure caused by sgtl5000 codec
driver change by supplying the correct clock for codec.
- imx6q emi_sel clock muxing and imx6q-iomuxc-gpr macro fixes
* tag 'imx-fixes-3.11' of git://git.linaro.org/people/shawnguo/linux-2.6:
ARM: dts: imx51-babbage: Pass a real clock to the codec
ARM i.MX53: mba53: Fix PWM backlight DT node
ARM: imx: fix vf610 enet module clock selection
ARM: mxs: saif0 is the clock provider to sgtl5000
ARM: i.MX6Q: correct emi_sel clock muxing
ARM i.MX6Q: Fix IOMUXC GPR1 defines for ENET_CLK_SEL and IPU1/2_MUX
ARM: i.MX27: Typo fix
ARM: imx27: Fix documentation for SPLL clock
ARM i.MX53: Fix UART pad configuration
From Tony Lindgren:
Omap fixes mostly to deal with the dropping of platform data for omap4,
and to make v7_defconfig bootable on omap4 SDP with nfsroot.
* tag 'omap-for-v3.11/fixes-against-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: OMAP2+: Provide alias to USB PHY clock
ARM: dts: Add missing vmmc2 regulator for twl
ARM: multi_v7: Enabled omap4430 sdp nfsroot
From Sekhar Nori:
DaVinci fixes for v3.11-rc2
The pull request includes fixes for sparse warnings, defconfig changes to
enable DMA usage on peripherals and removal of a duplicated include file.
* tag 'davinci-fixes-for-v3.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/nsekhar/linux-davinci:
ARM: davinci: defconfig: enable EDMA driver
ARM: davinci: make file local variables static
ARM: edma: remove duplicated include from edma.c
Signed-off-by: Olof Johansson <olof@lixom.net>
On platforms with no support for the shdma dmaengine driver build is
currently failing with
drivers/built-in.o: In function `sh_mobile_sdhi_probe':
drivers/mmc/host/sh_mobile_sdhi.c:170: undefined reference to`shdma_chan_filter'
Fix the breakage by defining shdma_chan_filter to NULL in such
configurations.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
[horms+renesas@verge.net.au: Apply change to shdma-base.h instead of sh_dma.h]
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Olof Johansson <olof@lixom.net>