Linux kernel stable tree (mirror) https://git.radix-linux.su/kernel/linux.git/atom?h=v3.15.2 2014-04-02T23:23:38+00:00 2014-04-02T23:23:38+00:00 Linus Torvalds torvalds@linux-foundation.org 2014-04-02T23:23:38+00:00 urn:sha1:159d8133d0b54a501a41a66fe3a0e7d16405e36d Pull trivial tree updates from Jiri Kosina: "Usual rocket science -- mostly documentation and comment updates" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: sparse: fix comment doc: fix double words isdn: capi: fix "CAPI_VERSION" comment doc: DocBook: Fix typos in xml and template file Bluetooth: add module name for btwilink driver core: unexport static function create_syslog_header mmc: core: typo fix in printk specifier ARM: spear: clean up editing mistake net-sysfs: fix comment typo 'CONFIG_SYFS' doc: Insert MODULE_ in module-signing macros Documentation: update URL to hfsplus Technote 1150 gpio: update path to documentation ixgbe: Fix format string in ixgbe_fcoe. Kconfig: Remove useless "default N" lines user_namespace.c: Remove duplicated word in comment CREDITS: fix formatting treewide: Fix typo in Documentation/DocBook mm: Fix warning on make htmldocs caused by slab.c ata: ata-samsung_cf: cleanup in header file idr: remove unused prototype of idr_free() 2014-03-30T00:50:57+00:00 Mark Brown broonie@linaro.org 2014-03-30T00:50:57+00:00 urn:sha1:0f38af451fc494378110d702058acf59d24b5331 2014-03-30T00:50:56+00:00 Mark Brown broonie@linaro.org 2014-03-30T00:50:56+00:00 urn:sha1:a78389844ea95f18aadda79246587c707586ce89 2014-03-29T11:09:26+00:00 Axel Lin axel.lin@ingics.com 2014-03-29T10:50:12+00:00 urn:sha1:d9721ae1493725bb14dcd1a3c19bbb5795e4a42f spi_bitbang_stop() never fails, so make it return void. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@linaro.org> 2014-02-20T13:54:28+00:00 Jiri Kosina jkosina@suse.cz 2014-02-20T13:54:28+00:00 urn:sha1:d4263348f796f29546f90802177865dd4379dd0a 2014-02-19T13:58:17+00:00 Masanari Iida standby24x7@gmail.com 2014-02-18T13:54:36+00:00 urn:sha1:e227867f12302633737bd2a48a10a9a72c0630cb This patch fix spelling typo in Documentation/DocBook. It is because .html and .xml files are generated by make htmldocs, I have to fix a typo within the source files. Signed-off-by: Masanari Iida <standby24x7@gmail.com> Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz> 2014-02-11T12:08:27+00:00 Mark Brown broonie@linaro.org 2014-02-11T12:08:27+00:00 urn:sha1:cf20662db4dfade737015036fa9c63e888350c82 2014-02-04T20:31:49+00:00 Mark Brown broonie@linaro.org 2014-02-02T13:47:47+00:00 urn:sha1:6ad45a27cbe343ec8d7888e5edf6335499a4b555 We cannot unconditionally use dma_map_single() to map data for use with SPI since transfers may exceed a page and virtual addresses may not be provided with physically contiguous pages. Further, addresses allocated using vmalloc() need to be mapped differently to other addresses. Currently only the MXS driver handles all this, a few drivers do handle the possibility that buffers may not be physically contiguous which is the main potential problem but many don't even do that. Factoring this out into the core will make it easier for drivers to do a good job so if the driver is using the core DMA code then generate a scatterlist instead of mapping to a single address so do that. This code is mainly based on a combination of the existing code in the MXS and PXA2xx drivers. In future we should be able to extend it to allow the core to concatenate adjacent transfers if they are compatible, improving performance. Currently for simplicity clients are not allowed to use the scatterlist when they do DMA mapping, in the future the existing single address mappings will be replaced with use of the scatterlist most likely as part of pre-verifying transfers. This change makes it mandatory to use scatterlists when using the core DMA mapping so update the s3c64xx driver to do this when used with dmaengine. Doing so makes the code more ugly but it is expected that the old s3c-dma code can be removed very soon. Signed-off-by: Mark Brown <broonie@linaro.org> 2014-02-04T20:31:33+00:00 Mark Brown broonie@linaro.org 2014-01-28T20:17:03+00:00 urn:sha1:3a2eba9bd0a6447dfbc01635e4cd0689f5f2bdad It is fairly common for SPI devices to require that one or both transfer directions is always active. Currently drivers open code this in various ways with varying degrees of efficiency. Start factoring this out by providing flags SPI_MASTER_MUST_TX and SPI_MASTER_MUST_RX. These will cause the core to provide buffers for the requested direction if none are specified in the underlying transfer. Currently this is fairly inefficient since we actually allocate a data buffer which may get large, support for mapping transfers using a scatterlist will allow us to avoid this for DMA based transfers. Signed-off-by: Mark Brown <broonie@linaro.org> 2014-02-03T13:05:21+00:00 Mark Brown broonie@linaro.org 2014-01-16T12:22:43+00:00 urn:sha1:99adef310f682d6343cb40c1f6c9c25a4b3a450d The process of DMA mapping buffers for SPI transfers does not vary between devices so in order to save duplication of code in drivers this can be factored out into the core, allowing it to be integrated with the work that is being done on factoring out the common elements from the data path including more sharing of dmaengine code. In order to use this masters need to provide a can_dma() operation and while the hardware is prepared they should ensure that DMA channels are provided in tx_dma and rx_dma. The core will then ensure that the buffers are mapped for DMA prior to calling transfer_one_message(). Currently the cleanup on error is not complete, this needs to be improved. Signed-off-by: Mark Brown <broonie@linaro.org>