- 21 Nov, 2012 1 commit
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Jonathan Cameron authored
These buffers are a little interesting in that their content may have variable endianness, but all but one element will definitely be big endian. Reported-by:
kbuild test robot <fengguang.wu@intel.com> Signed-off-by:
Jonathan Cameron <jic23@kernel.org> Acked-by:
Lars-Peter Clausen <lars@metafoo.de>
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- 20 Nov, 2012 7 commits
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Lars-Peter Clausen authored
This patch adds support for the ADIS16375, ADIS16480, ADIS16485, ADIS16488 6 degree to 10 degree of freedom IMUs. Signed-off-by:
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Lars-Peter Clausen authored
Factor out the code for parsing fixed point numbers into its own function and make this function globally available. This allows us to reuse the code to parse fixed point numbers in individual IIO drivers. Signed-off-by:
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Lars-Peter Clausen authored
This patch adds support for a new IIO channel type for pressure measurements. This can for example be used for barometric pressure sensors. Signed-off-by:
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Lars-Peter Clausen authored
Some of the newer generation devices from the ADIS16XXX series have more registers than what can be supported with the current register addressing scheme. These devices implement register paging to support a larger register range. Each page is 128 registers large and the currently active page can be selected via register 0x00 in each page. This patch implements transparent paging inside the common adis library. The register read/write interface stays the same and when a register is accessed the library automatically switches to the correct page if it is not already selected. The page number is encoded in the upper bits of the register number, e.g. register 0x5 of page 1 is 0x85. Signed-off-by:
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Lars-Peter Clausen authored
This patch adds support for the ADIS16133, ADIS16135, ADIS16136 single channel gyroscopes. The main difference between them is the sensor precision. Signed-off-by:
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Lars-Peter Clausen authored
Some of the newer generation devices from the ADIS16XXX family have 32bit wide register which spans two 16bit wide registers. This patch adds support for reading and writing a 32bit wide register. Signed-off-by:
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Lars-Peter Clausen authored
Provide a IIO debugfs register access function for the ADIS library. This function can be used by individual drivers to allow raw register access via debugfs. Signed-off-by:
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- 19 Nov, 2012 18 commits
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Lars-Peter Clausen authored
The driver does not expose any custom API to userspace and none of the standard static code checker tools report any issues, so move it out of staging. Signed-off-by:
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Lars-Peter Clausen authored
The recent cleanups have decimated the drivers code size by quite a bit. It is only a few hundred lines in total now. Putting everything into one file also allows to reduce the code size a bit more by removing a few lines of boilerplate code. The only functional change made by this patch is that we now always include buffer support, instead of making it optional. This is more consistent with what we do for other drivers. Signed-off-by:
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Lars-Peter Clausen authored
The temperature scale and offset depend on the reference voltage, the current formula used in the driver assumes a 2.5V reference. This patch modifies the code to report the unprocessed value for the temperature channel "raw" property and to provide proper "scale" and "offset" properties which depend on the selected reference voltage. Signed-off-by:
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Lars-Peter Clausen authored
Rework the regulator handling of the driver to match more closely what we do in other drivers. Make the regulator non-optional if a external reference is used. Also dispose the option of specifying the reference voltage via platform data. Signed-off-by:
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Lars-Peter Clausen authored
For buffered mode we do not want to perform endianness conversion in the kernel, but rather offload it to user space, since it is not always required to do a conversion at all. It also greatly simplifies the kernel code since no post-processing has to be done and may allow future optimizations like streaming data directly to a storage device or over the network via DMA. Signed-off-by:
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Lars-Peter Clausen authored
Now that the adis library no longer depends on the sw_ring buffer implementation we can move it out of staging. While we are at it also sort the entries in the iio Kconfig and Makefile to be in alphabetical order. Signed-off-by:
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Lars-Peter Clausen authored
Currently the driver reads out all sample registers of the device and throws away those which it does not need. Furthermore the SPI message is constructed each time the trigger handler is run, although it will be the same each time. This patch preallocates and pre-constructs the SPI message in the "update_scan_mode" callback. Only those register which are actually selected for sampling are included in the message. The patch also gets rid of the conversion of the sample data from big endian to the native endianness and instead marks the channel as big endian in its scan type. This allows to directly push the SPI transfer buffer to the IIO buffer without the need to post-process it. Signed-off-by:
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Lars-Peter Clausen authored
Use the triggered buffer helper functions to setup and tear down the buffer for the adis library instead of doing this manually. This also means that we switch away from the deprecated sw_ring buffer and use the kfifo buffer now instead. Signed-off-by:
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Lars-Peter Clausen authored
Use the new adis library for the adis16260 driver. This allows us to completely scrap the adis16260 buffer and trigger code and about half of the core driver code. Signed-off-by:
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Lars-Peter Clausen authored
Use the new adis library for the adis16240 driver. This allows us to completely scrap the adis16240 buffer and trigger code and more than half of the core driver code. Signed-off-by:
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Lars-Peter Clausen authored
Use the new adis library for the adis16220 driver. The adis16220 driver is a bit special and so we can only make use of the generic register access and control functions for now. Signed-off-by:
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Lars-Peter Clausen authored
Use the new adis library for the adis16209 driver. This allows us to completely scrap the adis16209 buffer and trigger code and more than half of the core driver code. Signed-off-by:
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Lars-Peter Clausen authored
Use the new adis library for the adis16204 driver. This allows us to completely scrap the adis16204 buffer and trigger code and more than half of the core driver code. Signed-off-by:
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Lars-Peter Clausen authored
Use the new adis library for the adis16203 driver. This allows us to completely scrap the adis16203 buffer and trigger code and more than half of the core driver code. Signed-off-by:
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Lars-Peter Clausen authored
Use the new adis library for the adis16201 driver. This allows us to completely scrap the adis16201 buffer and trigger code and more than half of the core driver code. Signed-off-by:
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Lars-Peter Clausen authored
A lot of the devices from the ADIS family use the same methods for accessing registers, sampling data and trigger handling. They also have similar register layout for the control registers. This patch adds a common library for these devices. The library implements functions for reading and writing registers as buffer and trigger management. It also provides a set functions for accessing the control registers and for running the devices internal self-test. Having this common library code will allow us to remove a lot of duplicated code. Signed-off-by:
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Wei Yongjun authored
We had assigned the return value to 'ret' but ignored it when return from isl29018_write_raw(), it's better to return 'ret' instead of 0. dpatch engine is used to auto generate this patch. (https://github.com/weiyj/dpatch) Signed-off-by:
Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by:
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Lars-Peter Clausen authored
Match the iio_buffer_register stub signature up to the real function and make the second parameter const. This fixes a the following warnings if CONFIG_IIO_BUFFER is disabled: drivers/staging/iio/accel/adis16201_core.c: In function ‘adis16201_probe’: drivers/staging/iio/accel/adis16201_core.c:536: warning: passing argument 2 of ‘iio_buffer_register’ discards qualifiers from pointer target type drivers/staging/iio/accel/adis16203_core.c: In function ‘adis16203_probe’: drivers/staging/iio/accel/adis16203_core.c:468: warning: passing argument 2 of ‘iio_buffer_register’ discards qualifiers from pointer target type drivers/staging/iio/accel/adis16204_core.c: In function ‘adis16204_probe’: drivers/staging/iio/accel/adis16204_core.c:527: warning: passing argument 2 of ‘iio_buffer_register’ discards qualifiers from pointer target type drivers/staging/iio/accel/adis16209_core.c: In function ‘adis16209_probe’: drivers/staging/iio/accel/adis16209_core.c:542: warning: passing argument 2 of ‘iio_buffer_register’ discards qualifiers from pointer target type drivers/staging/iio/accel/adis16240_core.c: In function ‘adis16240_probe’: drivers/staging/iio/accel/adis16240_core.c:588: warning: passing argument 2 of ‘iio_buffer_register’ discards qualifiers from pointer target type Signed-off-by:
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- 17 Nov, 2012 8 commits
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Axel Lin authored
Return -ENOMEM instead of 0 if kmemdup fails. Signed-off-by:
Axel Lin <axel.lin@ingics.com> Signed-off-by:
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Derek Basehore authored
In tsl_2563_write_interrupt_config and tsl2562_remove, interrupts are not disabled where they should be. This seems to be from a mistake of using |= instead of &= in 2 lines of code. Signed-off-by:
Derek Basehore <dbasehore@chromium.org> Signed-off-by:
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Julia Lawall authored
The function __iio_add_event_config_attrs is only called once, by the function iio_device_register_eventset. If the call fails, iio_device_register_eventset calls __iio_remove_event_config_attrs. There is thus no need for __iio_add_event_config_attrs to also call __iio_remove_event_config_attrs on failure. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r@ identifier f,free,a; parameter list[n] ps; type T; expression e; @@ f(ps,T a,...) { ... when any when != a = e if(...) { ... free(a); ... return ...; } ... when any } @@ identifier r.f,r.free; expression x,a; expression list[r.n] xs; @@ * x = f(xs,a,...); if (...) { ... free(a); ... return ...; } // </smpl> Signed-off-by:
Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by:
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Lars-Peter Clausen authored
The function is expected to return the number of bytes consumed and as long as not all bytes have been consumed the function will be called again. Currently the function returns 'ret', which will always be 0 in this case, so we end up in a endless loop since the caller will assume that no bytes have been consumed. So instead return len as it is supposed to. Signed-off-by:
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Kirill A. Shutemov authored
It's non-sense to use tristate for the option, it's bool. Signed-off-by:
Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by:
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Greg Kroah-Hartman authored
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Linus Torvalds authored
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git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds authored
Pull KVM fix from Marcelo Tosatti: "A correction for oops on module init with older Intel hosts." * git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: x86: Fix invalid secondary exec controls in vmx_cpuid_update()
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- 16 Nov, 2012 6 commits
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Linus Torvalds authored
Merge misc fixes from Andrew Morton. * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (12 patches) revert "mm: fix-up zone present pages" tmpfs: change final i_blocks BUG to WARNING tmpfs: fix shmem_getpage_gfp() VM_BUG_ON mm: highmem: don't treat PKMAP_ADDR(LAST_PKMAP) as a highmem address mm: revert "mm: vmscan: scale number of pages reclaimed by reclaim/compaction based on failures" rapidio: fix kernel-doc warnings swapfile: fix name leak in swapoff memcg: fix hotplugged memory zone oops mips, arc: fix build failure memcg: oom: fix totalpages calculation for memory.swappiness==0 mm: fix build warning for uninitialized value mm: add anon_vma_lock to validate_mm()
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Andy Gross authored
Return -ENOMEM if dmm_txn_init cannot allocate a refill engine. v2: Fix typing issue seen with newer compilers Signed-off-by:
Andy Gross <andy.gross@ti.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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YAMANE Toshiaki authored
Modify qt_status_change_check() and delete qt_status_change(). Signed-off-by:
YAMANE Toshiaki <yamanetoshi@gmail.com> Acked-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
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Andrew Morton authored
Revert commit 7f1290f2 ("mm: fix-up zone present pages") That patch tried to fix a issue when calculating zone->present_pages, but it caused a regression on 32bit systems with HIGHMEM. With that change, reset_zone_present_pages() resets all zone->present_pages to zero, and fixup_zone_present_pages() is called to recalculate zone->present_pages when the boot allocator frees core memory pages into buddy allocator. Because highmem pages are not freed by bootmem allocator, all highmem zones' present_pages becomes zero. Various options for improving the situation are being discussed but for now, let's return to the 3.6 code. Cc: Jianguo Wu <wujianguo@huawei.com> Cc: Jiang Liu <jiang.liu@huawei.com> Cc: Petr Tesarik <ptesarik@suse.cz> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Acked-by:
David Rientjes <rientjes@google.com> Tested-by:
Chris Clayton <chris2553@googlemail.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Hugh Dickins authored
Under a particular load on one machine, I have hit shmem_evict_inode()'s BUG_ON(inode->i_blocks), enough times to narrow it down to a particular race between swapout and eviction. It comes from the "if (freed > 0)" asymmetry in shmem_recalc_inode(), and the lack of coherent locking between mapping's nrpages and shmem's swapped count. There's a window in shmem_writepage(), between lowering nrpages in shmem_delete_from_page_cache() and then raising swapped count, when the freed count appears to be +1 when it should be 0, and then the asymmetry stops it from being corrected with -1 before hitting the BUG. One answer is coherent locking: using tree_lock throughout, without info->lock; reasonable, but the raw_spin_lock in percpu_counter_add() on used_blocks makes that messier than expected. Another answer may be a further effort to eliminate the weird shmem_recalc_inode() altogether, but previous attempts at that failed. So far undecided, but for now change the BUG_ON to WARN_ON: in usual circumstances it remains a useful consistency check. Signed-off-by:
Hugh Dickins <hughd@google.com> Cc: <stable@vger.kernel.org> Signed-off-by:
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Hugh Dickins authored
Fuzzing with trinity hit the "impossible" VM_BUG_ON(error) (which Fedora has converted to WARNING) in shmem_getpage_gfp(): WARNING: at mm/shmem.c:1151 shmem_getpage_gfp+0xa5c/0xa70() Pid: 29795, comm: trinity-child4 Not tainted 3.7.0-rc2+ #49 Call Trace: warn_slowpath_common+0x7f/0xc0 warn_slowpath_null+0x1a/0x20 shmem_getpage_gfp+0xa5c/0xa70 shmem_fault+0x4f/0xa0 __do_fault+0x71/0x5c0 handle_pte_fault+0x97/0xae0 handle_mm_fault+0x289/0x350 __do_page_fault+0x18e/0x530 do_page_fault+0x2b/0x50 page_fault+0x28/0x30 tracesys+0xe1/0xe6 Thanks to Johannes for pointing to truncation: free_swap_and_cache() only does a trylock on the page, so the page lock we've held since before confirming swap is not enough to protect against truncation. What cleanup is needed in this case? Just delete_from_swap_cache(), which takes care of the memcg uncharge. Signed-off-by:Dave Jones <davej@redhat.com> Cc: Johannes Weiner <hannes@cmpxchg.com> Cc: <stable@vger.kernel.org> Signed-off-by:
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