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* mm/vmalloc.c: rename VM_UNLIST to VM_UNINITIALIZEDZhang Yanfei2013-07-092-15/+15
| | | | | | | | | | | | | | | | VM_UNLIST was used to indicate that the vm_struct is not listed in vmlist. But after commit 4341fa454796 ("mm, vmalloc: remove list management of vmlist after initializing vmalloc"), the meaning of this flag changed. It now means the vm_struct is not fully initialized. So renaming it to VM_UNINITIALIZED seems more reasonable. Also change clear_vm_unlist to clear_vm_uninitialized_flag. Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm/vmalloc.c: emit the failure message before returnZhang Yanfei2013-07-091-1/+1
| | | | | | | | | | Use goto to jump to the fail label to give a failure message before returning NULL. This makes the failure handling in this function consistent. Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm/vmalloc.c: remove alloc_map from vmap_blockZhang Yanfei2013-07-091-3/+0
| | | | | | | | | | | | As we have removed the dead code in the vb_alloc, it seems there is no place to use the alloc_map. So there is no reason to maintain the alloc_map in vmap_block. Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm/vmalloc.c: remove unused purge_fragmented_blocks_thiscpuZhang Yanfei2013-07-091-5/+0
| | | | | | | | | | This function is nowhere used now, so remove it. Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm/vmalloc.c: remove dead code in vb_allocZhang Yanfei2013-07-091-15/+1
| | | | | | | | | | | | | | | | | | | | | | | | Space in a vmap block that was once allocated is considered dirty and not made available for allocation again before the whole block is recycled. The result is that free space within a vmap block is always contiguous. So if a vmap block has enough free space for allocation, the allocation is impossible to fail. Thus, the fragmented block purging was never invoked from vb_alloc(). So remove this dead code. [ Same patches also sent by: Chanho Min <chanho.min@lge.com> Johannes Weiner <hannes@cmpxchg.org> but git doesn't do "multiple authors" ] Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm/vmalloc.c: unbreak __vunmap()Dan Carpenter2013-07-091-1/+1
| | | | | | | | | There is an extra semi-colon so the function always returns. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: remove duplicated call of get_pfn_range_for_nidZhang Yanfei2013-07-091-11/+32
| | | | | | | | | | | | | | | | | | | | | | | | When calculating pages in a node, for each zone in that node, we will have zone_spanned_pages_in_node --> get_pfn_range_for_nid zone_absent_pages_in_node --> get_pfn_range_for_nid That is to say, we call the get_pfn_range_for_nid to get start_pfn and end_pfn of the node for MAX_NR_ZONES * 2 times. And this is totally unnecessary if we call the get_pfn_range_for_nid before zone_*_pages_in_node add two extra arguments node_start_pfn and node_end_pfn for zone_*_pages_in_node, then we can remove the get_pfn_range_in_node in zone_*_pages_in_node. [akpm@linux-foundation.org: make definitions more readable] Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: invoke oom-killer from remaining unconverted page fault handlersJohannes Weiner2013-07-096-19/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | A few remaining architectures directly kill the page faulting task in an out of memory situation. This is usually not a good idea since that task might not even use a significant amount of memory and so may not be the optimal victim to resolve the situation. Since 2.6.29's 1c0fe6e ("mm: invoke oom-killer from page fault") there is a hook that architecture page fault handlers are supposed to call to invoke the OOM killer and let it pick the right task to kill. Convert the remaining architectures over to this hook. To have the previous behavior of simply taking out the faulting task the vm.oom_kill_allocating_task sysctl can be set to 1. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Reviewed-by: Michal Hocko <mhocko@suse.cz> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: David Rientjes <rientjes@google.com> Acked-by: Vineet Gupta <vgupta@synopsys.com> [arch/arc bits] Cc: James Hogan <james.hogan@imgtec.com> Cc: David Howells <dhowells@redhat.com> Cc: Jonas Bonn <jonas@southpole.se> Cc: Chen Liqin <liqin.chen@sunplusct.com> Cc: Lennox Wu <lennox.wu@gmail.com> Cc: Chris Metcalf <cmetcalf@tilera.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* memcg: clean up memcg->nodeinfoJohannes Weiner2013-07-091-15/+5
| | | | | | | | | | | | | | | | | | Remove struct mem_cgroup_lru_info and fold its single member, the variably sized nodeinfo[0], directly into struct mem_cgroup. This should make it more obvious why it has to be the last member there. Also move the comment that's above that special last member below it, so it is more visible to somebody that considers appending to the struct mem_cgroup. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Cc: David Rientjes <rientjes@google.com> Acked-by: Michal Hocko <mhocko@suse.cz> Cc: Glauber Costa <glommer@openvz.org> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: mremap: validate input before taking lockRasmus Villemoes2013-07-091-8/+10
| | | | | | | | | | | | | | | | This patch is very similar to commit 84d96d897671 ("mm: madvise: complete input validation before taking lock"): perform some basic validation of the input to mremap() before taking the &current->mm->mmap_sem lock. This also makes the MREMAP_FIXED => MREMAP_MAYMOVE dependency slightly more explicit. Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/iommu/msm_iommu_dev.c: fix leak and clean up error pathsLibo Chen2013-07-091-14/+10
| | | | | | | | | | | | | | | | | Fix two obvious problems: 1. We have registered msm_iommu_driver first, and need unregister it when registered msm_iommu_ctx_driver fail 2. We don't need to kfree drvdata before kzalloc was successful. [akpm@linux-foundation.org: remove now-unneeded initialization of ctx_drvdata, remove unneeded braces] Signed-off-by: Libo Chen <libo.chen@huawei.com> Acked-by: David Brown <davidb@codeaurora.org> Cc: David Woodhouse <dwmw2@infradead.org> Cc: James Hogan <james.hogan@imgtec.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fsnotify: update comments concerning locking schemeLino Sanfilippo2013-07-091-28/+22
| | | | | | | | | | | | There have been changes in the locking scheme of fsnotify but the comments in the source code have not been updated yet. This patch corrects this. Signed-off-by: Lino Sanfilippo <LinoSanfilippo@gmx.de> Cc: Eric Paris <eparis@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* inotify: fix race when adding a new watchLino Sanfilippo2013-07-091-9/+4
| | | | | | | | | | | | | | | | | | | | In inotify_new_watch() the number of watches for a group is compared against the max number of allowed watches and increased afterwards. The check and incrementation is not done atomically, so it is possible for multiple concurrent threads to pass the check and increment the number of marks above the allowed max. This patch uses an inotify groups mark_lock to ensure that both check and incrementation are done atomic. Furthermore we dont have to worry about the race that allows a concurrent thread to add a watch just after inotify_update_existing_watch() returned with -ENOENT anymore, since this is also synchronized by the groups mark mutex now. Signed-off-by: Lino Sanfilippo <LinoSanfilippo@gmx.de> Cc: Eric Paris <eparis@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* dnotify: replace dnotify_mark_mutex with mark mutex of dnotify_groupLino Sanfilippo2013-07-091-12/+13
| | | | | | | | | | | | There is no need to use a special mutex to protect against the fcntl/close race (see dnotify.c for a description of this race). Instead the dnotify_groups mark mutex can be used. Signed-off-by: Lino Sanfilippo <LinoSanfilippo@gmx.de> Cc: Eric Paris <eparis@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fanotify: put duplicate code for adding vfsmount/inode marks into an own ↵Lino Sanfilippo2013-07-091-36/+35
| | | | | | | | | | | | | | function The code under the groups mark_mutex in fanotify_add_inode_mark() and fanotify_add_vfsmount_mark() is almost identical. So put it into a seperate function. Signed-off-by: Lino Sanfilippo <LinoSanfilippo@gmx.de> Cc: Eric Paris <eparis@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fanotify: fix races when adding/removing marksLino Sanfilippo2013-07-091-12/+37
| | | | | | | | | | | | | | | | | | | | | | | | | For both adding an event to an existing mark and destroying a mark we first have to find it via fsnotify_find_[inode|vfsmount]_mark(). But getting the mark and adding an event (or destroying it) is not done atomically. This opens a race where a thread is about to destroy a mark while another thread still finds the same mark and adds an event to its mask although it will be destroyed. Another race exists concerning the excess of a groups number of marks limit: When a mark is added the number of group marks is checked against the max number of marks per group and increased afterwards. Since check and increment is also not done atomically, this may result in 2 or more processes passing the check at the same time and increasing the number of group marks above the allowed limit. With this patch both races are avoided by doing the concerning operations with the groups mark mutex locked. Signed-off-by: Lino Sanfilippo <LinoSanfilippo@gmx.de> Cc: Eric Paris <eparis@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fanotify: info leak in copy_event_to_user()Dan Carpenter2013-07-091-0/+1
| | | | | | | | | | | The ->reserved field isn't cleared so we leak one byte of stack information to userspace. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Cc: Eric Paris <eparis@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* audit: Fix decimal constant descriptionMichal Simek2013-07-091-1/+1
| | | | | | | | | | | | | | | | | | Use proper decimal type for comparison with u32. Compilation warning was introduced by 780a7654 ("audit: Make testing for a valid loginuid explicit.") kernel/auditfilter.c: In function 'audit_data_to_entry': kernel/auditfilter.c:426:3: warning: this decimal constant is unsigned only in ISO C90 [enabled by default] if ((f->type == AUDIT_LOGINUID) && (f->val == 4294967295)) { Signed-off-by: Michal Simek <michal.simek@xilinx.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Eric Paris <eparis@redhat.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kernel/auditfilter.c: fix leak in audit_add_rule() error pathChen Gang2013-07-091-0/+6
| | | | | | | | | | | If both 'tree' and 'watch' are valid we must call audit_put_tree(), just like the preceding code within audit_add_rule(). Signed-off-by: Chen Gang <gang.chen@asianux.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Eric Paris <eparis@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kernel/auditfilter.c: fixing build warningRaphael S. Carvalho2013-07-091-1/+1
| | | | | | | | | | kernel/auditfilter.c:426: warning: this decimal constant is unsigned only in ISO C90 Signed-off-by: Raphael S. Carvalho <raphael.scarv@gmail.com> Cc: Eric Paris <eparis@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* audit: fix mq_open and mq_unlink to add the MQ root as a hidden parent ↵Jeff Layton2013-07-094-7/+34
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | audit_names record The old audit PATH records for mq_open looked like this: type=PATH msg=audit(1366282323.982:869): item=1 name=(null) inode=6777 dev=00:0c mode=041777 ouid=0 ogid=0 rdev=00:00 obj=system_u:object_r:tmpfs_t:s15:c0.c1023 type=PATH msg=audit(1366282323.982:869): item=0 name="test_mq" inode=26732 dev=00:0c mode=0100700 ouid=0 ogid=0 rdev=00:00 obj=staff_u:object_r:user_tmpfs_t:s15:c0.c1023 ...with the audit related changes that went into 3.7, they now look like this: type=PATH msg=audit(1366282236.776:3606): item=2 name=(null) inode=66655 dev=00:0c mode=0100700 ouid=0 ogid=0 rdev=00:00 obj=staff_u:object_r:user_tmpfs_t:s15:c0.c1023 type=PATH msg=audit(1366282236.776:3606): item=1 name=(null) inode=6926 dev=00:0c mode=041777 ouid=0 ogid=0 rdev=00:00 obj=system_u:object_r:tmpfs_t:s15:c0.c1023 type=PATH msg=audit(1366282236.776:3606): item=0 name="test_mq" Both of these look wrong to me. As Steve Grubb pointed out: "What we need is 1 PATH record that identifies the MQ. The other PATH records probably should not be there." Fix it to record the mq root as a parent, and flag it such that it should be hidden from view when the names are logged, since the root of the mq filesystem isn't terribly interesting. With this change, we get a single PATH record that looks more like this: type=PATH msg=audit(1368021604.836:484): item=0 name="test_mq" inode=16914 dev=00:0c mode=0100644 ouid=0 ogid=0 rdev=00:00 obj=unconfined_u:object_r:user_tmpfs_t:s0 In order to do this, a new audit_inode_parent_hidden() function is added. If we do it this way, then we avoid having the existing callers of audit_inode needing to do any sort of flag conversion if auditing is inactive. Signed-off-by: Jeff Layton <jlayton@redhat.com> Reported-by: Jiri Jaburek <jjaburek@redhat.com> Cc: Steve Grubb <sgrubb@redhat.com> Cc: Eric Paris <eparis@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/dma/iop-adma.c: fix new warningsOlof Johansson2013-07-091-2/+2
| | | | | | | | | | | | | | | | The recent "drivers/dma: remove unused support for MEMSET operations" change has fallout from lack of build testing by the author. This fixes: drivers/dma/iop-adma.c:1020:13: warning: unused variable 'dma_addr' [-Wunused-variable] drivers/dma/iop-adma.c:1519:2: warning: format '%s' expects a matching 'char *' argument [-Wformat=] Signed-off-by: Olof Johansson <olof@lixom.net> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Cc: Kyungmin Park <kyungmin.park@samsung.com> Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds2013-07-0749-799/+1862
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull slave-dmaengine updates from Vinod Koul: "Once you have some time from extended weekend celebrations please consider pulling the following to get: - Various fixes and PCI driver for dw_dmac by Andy - DT binding for imx-dma by Markus & imx-sdma by Shawn - DT fixes for dmaengine by Lars - jz4740 dmac driver by Lars - and various fixes across the drivers" What "extended weekend celebrations"? I'm in the merge window, who has time for extended celebrations.. * 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (40 commits) DMA: shdma: add DT support DMA: shdma: shdma_chan_filter() has to be in shdma-base.h DMA: shdma: (cosmetic) don't re-calculate a pointer dmaengine: at_hdmac: prepare clk before calling enable dmaengine/trivial: at_hdmac: add curly brackets to if/else expressions dmaengine: at_hdmac: remove unsuded atc_cleanup_descriptors() dmaengine: at_hdmac: add FIFO configuration parameter to DMA DT binding ARM: at91: dt: add header to define at_hdmac configuration MIPS: jz4740: Correct clock gate bit for DMA controller MIPS: jz4740: Remove custom DMA API MIPS: jz4740: Register jz4740 DMA device dma: Add a jz4740 dmaengine driver MIPS: jz4740: Acquire and enable DMA controller clock dma: mmp_tdma: disable irq when disabling dma channel dmaengine: PL08x: Avoid collisions with get_signal() macro dmaengine: dw: select DW_DMAC_BIG_ENDIAN_IO automagically dma: dw: add PCI part of the driver dma: dw: split driver to library part and platform code dma: move dw_dmac driver to an own directory dw_dmac: don't check resource with devm_ioremap_resource ...
| * DMA: shdma: add DT supportGuennadi Liakhovetski2013-07-056-13/+205
| | | | | | | | | | | | | | | | | | | | | | | | This patch adds Device Tree support to the shdma driver. No special DT properties are used, only standard DMA DT bindings are implemented. Since shdma controllers reside on SoCs, their configuration is SoC-specific and shall be passed to the driver from the SoC platform data, using the auxdata procedure. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * DMA: shdma: shdma_chan_filter() has to be in shdma-base.hGuennadi Liakhovetski2013-07-052-2/+1
| | | | | | | | | | | | | | | | shdma_chan_filter() is a function, provided by the shdma-base.c module, move its declaration to the appropriate header. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * DMA: shdma: (cosmetic) don't re-calculate a pointerGuennadi Liakhovetski2013-07-051-1/+1
| | | | | | | | | | | | | | Use an existing pointer instead of retrieving it again. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dmaengine: at_hdmac: prepare clk before calling enableBoris BREZILLON2013-07-051-6/+9
| | | | | | | | | | | | | | | | | | Replace clk_enable/disable with clk_prepare_enable/disable_unprepare to avoid common clk framework warnings. Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com> [nicolas.ferre@atmel.com: remove return code checking in at_dma_resume_noirq()] Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
| * dmaengine/trivial: at_hdmac: add curly brackets to if/else expressionsNicolas Ferre2013-07-051-2/+4
| | | | | | | | | | | | | | | | Correct coding style following the patch: 7c407d3e54dcc0c79119553c8d5ef176c1d5bc3a (DMA: AT91: Get residual bytes in dma buffer). Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
| * dmaengine: at_hdmac: remove unsuded atc_cleanup_descriptors()Nicolas Ferre2013-07-051-31/+0
| | | | | | | | | | | | | | | | | | | | | | Since patch 7c407d3e54dcc0c79119553c8d5ef176c1d5bc3a (DMA: AT91: Get residual bytes in dma buffer), the function atc_cleanup_descriptors() is not used anymore. We remove it to prevent warnings. Reported-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
| * dmaengine: at_hdmac: add FIFO configuration parameter to DMA DT bindingLudovic Desroches2013-07-052-6/+26
| | | | | | | | | | | | | | | | | | | | | | | | For most devices the FIFO configuration is the same i.e. when half FIFO size is available/filled, a source/destination request is serviced. But USART devices have to do it when there is enough space/data available to perform a single AHB access so the ASAP configuration. Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
| * ARM: at91: dt: add header to define at_hdmac configurationLudovic Desroches2013-07-051-0/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | DMA-cell content is a concatenation of several values. In order to keep this stuff human readable, macros are introduced. The values for the FIFO configuration are not the same as the ones used in the configuration register in order to keep backward compatibility. Most devices use the half FIFO configuration but USART ones have to use the ASAP configuration. This parameter was not initially planed to be into the at91 dma dt binding. The third cell will be used to store this parameter, it will become a concatenation of the FIFO configuration and of the peripheral ID. In order to keep backward compatibility i.e. FIFO configuration is equal to 0, we have to perform a translation since the value to put in the register to set half FIFO is 1. Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
| * MIPS: jz4740: Correct clock gate bit for DMA controllerMaarten ter Huurne2013-07-051-1/+1
| | | | | | | | | | | | | | Signed-off-by: Maarten ter Huurne <maarten@treewalker.org> Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * MIPS: jz4740: Remove custom DMA APILars-Peter Clausen2013-07-054-401/+222
| | | | | | | | | | | | | | | | | | | | Now that all users of the custom jz4740 DMA API have been converted to use the dmaengine API instead we can remove the custom API and move all the code talking to the hardware to the dmaengine driver. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * MIPS: jz4740: Register jz4740 DMA deviceLars-Peter Clausen2013-07-053-0/+23
| | | | | | | | | | | | | | | | | | Register a device for the newly added jz4740 dmaengine driver. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Ralf Baechle <ralf@linux-mips.org> [manually edited to align struct assignment] Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dma: Add a jz4740 dmaengine driverLars-Peter Clausen2013-07-053-0/+440
| | | | | | | | | | | | | | | | | | | | | | This patch adds dmaengine support for the JZ4740 DMA controller. For now the driver will be a wrapper around the custom JZ4740 DMA API. Once all users of the custom JZ4740 DMA API have been converted to the dmaengine API the custom API will be removed and direct hardware access will be added to the dmaengine driver. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * MIPS: jz4740: Acquire and enable DMA controller clockMaarten ter Huurne2013-07-051-2/+22
| | | | | | | | | | | | | | | | | | | | | | Previously, it was assumed that the DMA controller clock is not gated when the kernel starts running. While that is the power-on state, it is safer to not rely on that. Signed-off-by: Maarten ter Huurne <maarten@treewalker.org> Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dma: mmp_tdma: disable irq when disabling dma channelQiao Zhou2013-07-051-0/+4
| | | | | | | | | | | | | | | | | | mask dma irq when disabling dma channel, so that interrupt status will not be set and interrupt won't come again. Signed-off-by: Qiao Zhou <zhouqiao@marvell.com> Acked-by: Zhangfei Gao <zhangfei.gao@gmail.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dmaengine: PL08x: Avoid collisions with get_signal() macroMark Brown2013-07-055-14/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | As pointed out by Arnd Bergmann there is a get_signal macro definied in linux/signal.h which can conflict with the platform data callback function of the same name leading to confusing errors from the compiler (especially if signal.h manages to get pulled into the driver itself due to header dependencies). Avoid such errors by renaming get_signal and put_signal in the platform data to get_xfer_signal and put_xfer_signal. Signed-off-by: Mark Brown <broonie@linaro.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dmaengine: dw: select DW_DMAC_BIG_ENDIAN_IO automagicallyVinod Koul2013-07-052-9/+8
| | | | | | | | Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dma: dw: add PCI part of the driverAndy Shevchenko2013-07-053-0/+113
| | | | | | | | | | | | | | | | | | | | This is the PCI part of the DesignWare DMAC driver. The controller is usually used in the Intel hardware such as Intel Medfield. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dma: dw: split driver to library part and platform codeAndy Shevchenko2013-07-057-279/+436
| | | | | | | | | | | | | | | | | | | | | | To simplify the driver development let's split driver to library and platform code parts. It helps us to add PCI driver in future. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> [Fixed compile error and few checkpatch issues] Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dma: move dw_dmac driver to an own directoryAndy Shevchenko2013-07-057-23/+28
| | | | | | | | | | | | | | | | | | | | The dw_dmac driver is going to be split into multiple files. To make this more convenient move it to an own directory. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dw_dmac: don't check resource with devm_ioremap_resourceAndy Shevchenko2013-07-051-4/+1
| | | | | | | | | | | | | | | | | | | | devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dma: pl330: use dma_addr_t for describing bus addressesWill Deacon2013-07-051-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The microcode bus address (pl330_dmac.mcode_bus) is currently a u32, which fails to compile when building on a system with 64-bit bus addresses. This patch uses dma_addr_t to represent the address instead. Cc: Jassi Brar <jaswinder.singh@linaro.org> Cc: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Acked-by: Jassi Brar <jaswinder.singh@linaro.org> Acked-by: Grant Likely <grant.likely@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dma: pl330: rip out broken, redundant ID probingWill Deacon2013-07-051-24/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The PL330 driver probes the peripheral and primecell IDs of the device to make sure that it is indeed an AMBA PL330. However, it does this by making byte accesses to a device mapping of the word-aligned ID registers, which is either UNPREDICTABLE or generates an alignment fault (depending on the presence of the virtualisation extensions). Rather than fix this code, we can actually rip most of it out and let the AMBA bus driver correctly do the probing for us. Cc: Jassi Brar <jaswinder.singh@linaro.org> Cc: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Acked-by: Jassi Brar <jaswinder.singh@linaro.org> Acked-by: Grant Likely <grant.likely@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dma: imx-sdma: move to generic device tree bindingsShawn Guo2013-07-052-0/+96
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Update imx-sdma driver to adopt generic DMA device tree bindings. It calls of_dma_controller_register() with imx-sdma specific of_dma_xlate to get the generic DMA device tree helper support. The #dma-cells for imx-sdma must be 3, which includes request ID, peripheral type and priority. The existing way of requesting channel, clients directly call dma_request_channel(), still work there, and will be removed after all imx-sdma clients get converted to generic DMA device tree helper. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
| * dmaengine: sirf: set dma residue based on the current dma transfer positionRongjun Ying2013-07-051-0/+17
| | | | | | | | | | | | | | | | | | | | read SIRFSOC_DMA_CH_ADDR register to get current dma transfer position, then update dma residue so that things like ALSA drivers work as ALSA drivers need the right residue value. Signed-off-by: Rongjun Ying <Rongjun.Ying@csr.com> Signed-off-by: Barry Song <Baohua.Song@csr.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dma: tegra: avoid channel lock up after freeDmitry Osipenko2013-07-051-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Lock scenario: Channel 1 was allocated and prepared as slave_sg, used and freed. Now preparation of cyclic dma on channel 1 will fail with err "DMA configuration conflict" because tdc->isr_handler still setted to handle_once_dma_done. This happens because tegra_dma_abort_all() won't be called on channel freeing if pending list is empty and channel not busy. We need to clear isr_handler on channel freeing to avoid locking. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Acked-by: Stephen Warren <swarren@nvidia.com> Acked-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dma: tegra20-apbdma: err message correctionDmitry Osipenko2013-07-051-1/+1
| | | | | | | | | | | | | | | | | | Fixed err msg params order on irq request fail. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Acked-by: Stephen Warren <swarren@nvidia.com> Acked-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| * dw_dmac: remove inline marking of EXPORT_SYMBOL functionsDenis Efremov2013-07-051-2/+2
| | | | | | | | | | | | | | | | | | | | EXPORT_SYMBOL and inline directives are contradictory to each other. The patch fixes this inconsistency. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Denis Efremov <yefremov.denis@gmail.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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