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2018-08-27dmaengine: mic_x100_dma: use devm_kzalloc to fix an issueHuang Shijie1-3/+1
The following patch introduced an issue. commit f6206f00d8c5 ("dmaengine: mic_x100_dma: use the new helper to simplify the code") This issue is : kfree(mic_dma_dev) ..... dma_async_device_unregister(mic_dma_dev->device); Free the memory, and use it again. So use devm_kzalloc to allocate mic_dma_dev to fix it. When the Devres try to release the resources, it will call release at the following order: dma_async_device_unregister(mic_dma_dev->device); ..... kfree(mic_dma_dev) Fixes: f6206f00d8c5 ("dmaengine: mic_x100_dma: use the new helper to simplify the code") Signed-off-by: Huang Shijie <sjhuang@iluvatar.ai> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-08-26Merge branch 'ida-4.19' of git://git.infradead.org/users/willy/linux-daxLinus Torvalds1-16/+7
Pull IDA updates from Matthew Wilcox: "A better IDA API: id = ida_alloc(ida, GFP_xxx); ida_free(ida, id); rather than the cumbersome ida_simple_get(), ida_simple_remove(). The new IDA API is similar to ida_simple_get() but better named. The internal restructuring of the IDA code removes the bitmap preallocation nonsense. I hope the net -200 lines of code is convincing" * 'ida-4.19' of git://git.infradead.org/users/willy/linux-dax: (29 commits) ida: Change ida_get_new_above to return the id ida: Remove old API test_ida: check_ida_destroy and check_ida_alloc test_ida: Convert check_ida_conv to new API test_ida: Move ida_check_max test_ida: Move ida_check_leaf idr-test: Convert ida_check_nomem to new API ida: Start new test_ida module target/iscsi: Allocate session IDs from an IDA iscsi target: fix session creation failure handling drm/vmwgfx: Convert to new IDA API dmaengine: Convert to new IDA API ppc: Convert vas ID allocation to new IDA API media: Convert entity ID allocation to new IDA API ppc: Convert mmu context allocation to new IDA API Convert net_namespace to new IDA API cb710: Convert to new IDA API rsxx: Convert to new IDA API osd: Convert to new IDA API sd: Convert to new IDA API ...
2018-08-21dmaengine: Convert to new IDA APIMatthew Wilcox1-16/+7
Simpler and shorter code. Signed-off-by: Matthew Wilcox <willy@infradead.org> Acked-by: Vinod Koul <vkoul@kernel.org>
2018-08-18Merge tag 'dmaengine-4.19-rc1' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds17-300/+1532
Pull DMAengine updates from Vinod Koul: "This round brings couple of framework changes, a new driver and usual driver updates: - new managed helper for dmaengine framework registration - split dmaengine pause capability to pause and resume and allow drivers to report that individually - update dma_request_chan_by_mask() to handle deferred probing - move imx-sdma to use virt-dma - new driver for Actions Semi Owl family S900 controller - minor updates to intel, renesas, mv_xor, pl330 etc" * tag 'dmaengine-4.19-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (46 commits) dmaengine: Add Actions Semi Owl family S900 DMA driver dt-bindings: dmaengine: Add binding for Actions Semi Owl SoCs dmaengine: sh: rcar-dmac: Should not stop the DMAC by rcar_dmac_sync_tcr() dmaengine: mic_x100_dma: use the new helper to simplify the code dmaengine: add a new helper dmaenginem_async_device_register dmaengine: imx-sdma: add memcpy interface dmaengine: imx-sdma: add SDMA_BD_MAX_CNT to replace '0xffff' dmaengine: dma_request_chan_by_mask() to handle deferred probing dmaengine: pl330: fix irq race with terminate_all dmaengine: Revert "dmaengine: mv_xor_v2: enable COMPILE_TEST" dmaengine: mv_xor_v2: use {lower,upper}_32_bits to configure HW descriptor address dmaengine: mv_xor_v2: enable COMPILE_TEST dmaengine: mv_xor_v2: move unmap to before callback dmaengine: mv_xor_v2: convert callback to helper function dmaengine: mv_xor_v2: kill the tasklets upon exit dmaengine: mv_xor_v2: explicitly freeup irq dmaengine: sh: rcar-dmac: Add dma_pause operation dmaengine: sh: rcar-dmac: add a new function to clear CHCR.DE with barrier dmaengine: idma64: Support dmaengine_terminate_sync() dmaengine: hsu: Support dmaengine_terminate_sync() ...
2018-08-18Merge tag 'char-misc-4.19-rc1' of ↵Linus Torvalds2-0/+2
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc Pull char/misc driver updates from Greg KH: "Here is the bit set of char/misc drivers for 4.19-rc1 There is a lot here, much more than normal, seems like everyone is writing new driver subsystems these days... Anyway, major things here are: - new FSI driver subsystem, yet-another-powerpc low-level hardware bus - gnss, finally an in-kernel GPS subsystem to try to tame all of the crazy out-of-tree drivers that have been floating around for years, combined with some really hacky userspace implementations. This is only for GNSS receivers, but you have to start somewhere, and this is great to see. Other than that, there are new slimbus drivers, new coresight drivers, new fpga drivers, and loads of DT bindings for all of these and existing drivers. All of these have been in linux-next for a while with no reported issues" * tag 'char-misc-4.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (255 commits) android: binder: Rate-limit debug and userspace triggered err msgs fsi: sbefifo: Bump max command length fsi: scom: Fix NULL dereference misc: mic: SCIF Fix scif_get_new_port() error handling misc: cxl: changed asterisk position genwqe: card_base: Use true and false for boolean values misc: eeprom: assignment outside the if statement uio: potential double frees if __uio_register_device() fails eeprom: idt_89hpesx: clean up an error pointer vs NULL inconsistency misc: ti-st: Fix memory leak in the error path of probe() android: binder: Show extra_buffers_size in trace firmware: vpd: Fix section enabled flag on vpd_section_destroy platform: goldfish: Retire pdev_bus goldfish: Use dedicated macros instead of manual bit shifting goldfish: Add missing includes to goldfish.h mux: adgs1408: new driver for Analog Devices ADGS1408/1409 mux dt-bindings: mux: add adi,adgs1408 Drivers: hv: vmbus: Cleanup synic memory free path Drivers: hv: vmbus: Remove use of slow_virt_to_phys() Drivers: hv: vmbus: Reset the channel callback in vmbus_onoffer_rescind() ...
2018-08-17Merge branch 'topic/pl330' into for-linusVinod Koul1-6/+6
2018-08-17Merge branch 'topic/imx' into for-linusVinod Koul2-199/+380
2018-08-17Merge branch 'topic/xilinx' into for-linusVinod Koul1-0/+22
2018-08-17Merge branch 'topic/ste' into for-linusVinod Koul3-8/+19
2018-08-17Merge branch 'topic/renesas' into for-linusVinod Koul1-66/+46
2018-08-17Merge branch 'topic/owl' into for-linusVinod Koul3-0/+980
2018-08-17Merge branch 'topic/nbpfaxi' into for-linusVinod Koul1-0/+1
2018-08-17Merge branch 'topic/mv_xor' into for-linusVinod Koul1-6/+10
2018-08-17Merge branch 'topic/ioat' into for-linusVinod Koul1-0/+6
2018-08-17Merge branch 'topic/intel' into for-linusVinod Koul2-0/+16
2018-08-09Merge branch 'asoc-4.19' into asoc-nextMark Brown1-1/+14
2018-08-09dmaengine: Add Actions Semi Owl family S900 DMA driverManivannan Sadhasivam3-0/+980
Add Actions Semi Owl family S900 DMA driver. Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-31dmaengine: sh: rcar-dmac: Should not stop the DMAC by rcar_dmac_sync_tcr()Yoshihiro Shimoda1-17/+0
rcar_dmac_chan_get_residue() should not stop the DMAC, because the commit 538603c6026c ("dmaengine: sh: rcar-dmac: avoid to write CHCR.TE to 1 if TCR is set to 0") had fixed unexpected re-transferring issue. But it had caused the next issue which might stop the cyclic mode transferring. Thus, for example R-Car sound might be stopped suddenly. According to the commit 73a47bd0da66 ("dmaengine: rcar-dmac: use TCRB instead of TCR for residue"), the purpose of clearing CHCR.DE bit is flushing buffered data to calculate the exact residue. Such the "exact" residue had been required by sh-sci driver. sh-sci driver is calling dmaengine_pause() to stop transferring, and get "exact" residue. Otherwise, it might receive extra data during getting residue without pausing. In rx_timer_fn() of sh-sci driver: dmaengine_tx_status(); /* For checking roughly */ dmaengine_pause(); dmaengine_tx_status(); /* For getting residue */ dmaengine_terminate_all(); But, unfortunately the rcar-dmac driver didn't support dmaengine_pause() at that time. So, the sh-sci driver cannot get the "exact" residue without stopping the transferring, because rcar-dmac is buffering data inside. Because of these backgrounds, rcar-dmac had been cleared/set CHCR.DE bit in rcar_dmac_chan_get_residue() to synchronizing data and getting "exact" residue. However, rcar-dmac driver has rcar_dmac_chan_pause() now, and clearing CHCR.DE bit in rcar_dmac_chan_get_residue() doesn't need anymore. So, this patch removes the rcar_dmac_sync_tcr(). Fixes: 73a47bd0da66 ("dmaengine: rcar-dmac: use TCRB instead of TCR for residue") Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Tested-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-30dmaengine: mic_x100_dma: use the new helper to simplify the codeHuang Shijie1-7/+1
Use dmaenginem_async_device_register() to simplify the code: remove the mic_dma_unregister_dma_device() Signed-off-by: Huang Shijie <sjhuang@iluvatar.ai> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-30dmaengine: add a new helper dmaenginem_async_device_registerHuang Shijie1-0/+35
This patch adds the dmaenginem_async_device_register for DMA code. Use the Devres to call the release for the DMA engine driver. Signed-off-by: Huang Shijie <sjhuang@iluvatar.ai> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-30dmaengine: imx-sdma: add memcpy interfaceRobin Gong1-3/+90
Add MEMCPY capability for imx-sdma driver. Signed-off-by: Robin Gong <yibin.gong@nxp.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-30dmaengine: imx-sdma: add SDMA_BD_MAX_CNT to replace '0xffff'Robin Gong1-5/+6
Add macro SDMA_BD_MAX_CNT to replace '0xffff'. Signed-off-by: Robin Gong <yibin.gong@nxp.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-25dmaengine: dma_request_chan_by_mask() to handle deferred probingPeter Ujfalusi1-2/+8
If there are no DMA devices registered yet, return with EPROBE_DEFER similarly to the case when requesting a slave channel. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-25dmaengine: pl330: fix irq race with terminate_allJohn Keeping1-2/+3
In pl330_update() when checking if a channel has been aborted, the channel's lock is not taken, only the overall pl330_dmac lock. But in pl330_terminate_all() the aborted flag (req_running==-1) is set under the channel lock and not the pl330_dmac lock. With threaded interrupts, this leads to a potential race: pl330_terminate_all pl330_update ------------------- ------------ lock channel entry lock pl330 _stop channel unlock pl330 lock pl330 check req_running != -1 req_running = -1 _start channel Signed-off-by: John Keeping <john@metanate.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-25dmaengine: Revert "dmaengine: mv_xor_v2: enable COMPILE_TEST"Vinod Koul1-1/+1
This reverts commit 31d5e6b72439: ("dmaengine: mv_xor_v2: enable COMPILE_TEST") as enabling causing bunch of build failures. Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-25dmaengine: mv_xor_v2: use {lower,upper}_32_bits to configure HW descriptor ↵Hanna Hawa1-2/+2
address >> drivers/dma/mv_xor_v2.c:647:36: sparse: constant 0xFFFF00000000 is so big it is long include/linux/device.h:678:13: sparse: undefined identifier '__builtin_mul_overflow' include/linux/device.h:678:13: sparse: call with no type! Use lower_32_bits and upper_32_bits to set the hw_desq address, instead of using constant. Signed-off-by: Hanna Hawa <hannah@marvell.com> Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-20dmaengine: mv_xor_v2: enable COMPILE_TESTHanna Hawa1-1/+1
To get more coverage, enable COMPILE_TEST for this driver. Signed-off-by: Hanna Hawa <hannah@marvell.com> Reviewed-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-20dmaengine: mv_xor_v2: move unmap to before callbackHanna Hawa1-2/+1
Completion callback should happen after dma_descriptor_unmap() has happened. This allow the cache invalidate to happen and ensure that the data accessed by the upper layer is in memory that was from DMA rather than stale data. On some architecture this is done by the hardware, however we should make the code consistent to not cause confusion. Signed-off-by: Hanna Hawa <hannah@marvell.com> Reviewed-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-20dmaengine: mv_xor_v2: convert callback to helper functionHanna Hawa1-3/+2
This is in preparation of moving to a callback that provides results to the callback for the transaction. The conversion will maintain current behavior and the driver must convert to new callback mechanism at a later time in order to receive results. Signed-off-by: Hanna Hawa <hannah@marvell.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-20dmaengine: mv_xor_v2: kill the tasklets upon exitHanna Hawa1-0/+2
The mv_xor_v2 driver uses a tasklet, initialized during the probe() routine. However, it forgets to cleanup the tasklet using tasklet_kill() function during the remove() routine, which this patch fixes. This prevents the tasklet from potentially running after the module has been removed. Fixes: 19a340b1a820 ("dmaengine: mv_xor_v2: new driver") Signed-off-by: Hanna Hawa <hannah@marvell.com> Reviewed-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-20dmaengine: mv_xor_v2: explicitly freeup irqHanna Hawa1-0/+4
dmaengine device should explicitly call devm_free_irq() when using devm_request_irq(). The irq is still ON when devices remove is executed and irq should be quiesced before remove is completed. Signed-off-by: Hanna Hawa <hannah@marvell.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-16Merge 4.18-rc5 into char-misc-nextGreg Kroah-Hartman3-3/+7
We want the char-misc fixes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-11dmaengine: sh: rcar-dmac: Add dma_pause operationYoshihiro Shimoda1-0/+12
This patch adds dma_pause operation. This patch is based on Muhammad Hamza Farooq's patch. After this patch applied, an issue that the sh-sci driver with high baud rate might cause data lost disappeared because the DMAC is possible to transmit between [1] and [2] below, and then the residue of [1] is not true: In rx_timer_fn() of the sh-sci.c: dmaengine_pause(); ... dmaengine_tx_status(); /* [1] */ ... dmaengine_terminate_all(); /* [2] */ Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-11dmaengine: sh: rcar-dmac: add a new function to clear CHCR.DE with barrierYoshihiro Shimoda1-4/+11
This patch adds a new function rcar_dmac_clear_chcr_de() to simplify adding pause function later. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-10dmaengine: idma64: Support dmaengine_terminate_sync()Andy Shevchenko1-0/+8
It appears that the driver misses the support of dmaengine_terminate_sync(). Since many of callers expects this behaviour implement the new device_synchronize() callback to allow proper synchronization when stopping a channel. Fixes: b36f09c3c441 ("dmaengine: Add transfer termination synchronization support") Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-10dmaengine: hsu: Support dmaengine_terminate_sync()Andy Shevchenko1-0/+8
It appears that the driver misses the support of dmaengine_terminate_sync(). Since many of callers expects this behaviour implement the new device_synchronize() callback to allow proper synchronization when stopping a channel. Fixes: b36f09c3c441 ("dmaengine: Add transfer termination synchronization support") Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-10dmaengine: sh: rcar-dmac: avoid to write CHCR.TE to 1 if TCR is set to 0Yoshihiro Shimoda1-2/+3
This patch fixes an issue that unexpected retransfering happens if TCR is set to 0 before rcar_dmac_sync_tcr() writes DE bit to the CHCR register. For example, sh-sci driver can reproduce this issue like below: In rx_timer_fn(): /* CHCR DE bit may be set to 1 */ dmaengine_tx_status() rcar_dmac_tx_status() rcar_dmac_chan_get_residue() rcar_dmac_sync_tcr() /* TCR is possible to be set to 0 */ According to the description of commit 73a47bd0da66 ("dmaengine: rcar-dmac: use TCRB instead of TCR for residue"), "this buffered data will be transferred if CHCR::DE bit was cleared". So, this patch doesn't need to check TCRB register. Fixes: 73a47bd0da66 ("dmaengine: rcar-dmac: use TCRB instead of TCR for residue") Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-10dmaengine: pl330: remove set but unused variableVinod Koul1-4/+0
Compiler complains (with W=1): drivers/dma/pl330.c: In function ‘pl330_release_channel’: drivers/dma/pl330.c:1782:21: warning: variable ‘pl330’ set but not used [-Wunused-but-set-variable] struct pl330_dmac *pl330; ^~~~~ Remove the pl330 variable in pl330_release_channel as it is set but never used. Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-10dmaengine: pl330: Mark expected switch fall-throughVinod Koul1-0/+3
In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-09dmaengine: stm32: replace "%p" with "%pK"Benjamin Gaignard2-6/+6
The format specifier "%p" can leak kernel addresses. Use "%pK" instead. Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-09dmaengine: add support for reporting pause and resume separatelyMarek Szyprowski1-6/+2
'cmd_pause' DMA channel capability means that respective DMA engine supports both pausing and resuming given DMA channel. However, in some cases it is important to know if DMA channel can be paused without the need to resume it. This is a typical requirement for proper residue reading on transfer timeout in UART drivers. There are also some DMA engines with limited hardware, which doesn't really support resuming. Reporting pause and resume capabilities separately allows UART drivers to properly check for the really required capabilities and operate in DMA mode also in systems with limited DMA hardware. On the other hand drivers, which rely on full channel suspend/resume support, should now check for both 'pause' and 'resume' features. Existing clients of dma_get_slave_caps() have been checked and the only driver which rely on proper channel resuming is soc-generic-dmaengine-pcm driver, which has been updated to check the newly added capability. Existing 'cmd_pause' now only indicates that DMA engine support pausing given DMA channel. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: Mark Brown <broonie@kernel.org> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-09dmaengine: rcar-dmac: clear channel register when errorKuninori Morimoto1-1/+9
We need to clear channel register in error case as recovery. The channel is already stopped in such case, thus we don't need to call rcar_dmac_chan_halt() before clearing. rcar_dmac_chan_halt() will clear and confirm DE bit. But it will be failed because channel is already stopped in error case. In other words, we shouldn't call it then. Reported-by: Hiroki Negishi <hiroki.negishi.bx@renesas.com> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Reviewed-by: Hiroki Negishi <hiroki.negishi.bx@renesas.com> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-09dmaengine: rcar-dmac: Disable interrupts while stopping channelsGeert Uytterhoeven1-2/+2
During system reboot or halt, with lockdep enabled: ================================ WARNING: inconsistent lock state 4.18.0-rc1-salvator-x-00002-g9203dbec90a68103 #41 Tainted: G W -------------------------------- inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage. reboot/2779 [HC0[0]:SC0[0]:HE1:SE1] takes: 0000000098ae4ad3 (&(&rchan->lock)->rlock){?.-.}, at: rcar_dmac_shutdown+0x58/0x6c {IN-HARDIRQ-W} state was registered at: lock_acquire+0x208/0x238 _raw_spin_lock+0x40/0x54 rcar_dmac_isr_channel+0x28/0x200 __handle_irq_event_percpu+0x1c0/0x3c8 handle_irq_event_percpu+0x34/0x88 handle_irq_event+0x48/0x78 handle_fasteoi_irq+0xc4/0x12c generic_handle_irq+0x18/0x2c __handle_domain_irq+0xa8/0xac gic_handle_irq+0x78/0xbc el1_irq+0xec/0x1c0 arch_cpu_idle+0xe8/0x1bc default_idle_call+0x2c/0x30 do_idle+0x144/0x234 cpu_startup_entry+0x20/0x24 rest_init+0x27c/0x290 start_kernel+0x430/0x45c irq event stamp: 12177 hardirqs last enabled at (12177): [<ffffff800881d804>] _raw_spin_unlock_irq+0x2c/0x4c hardirqs last disabled at (12176): [<ffffff800881d638>] _raw_spin_lock_irq+0x1c/0x60 softirqs last enabled at (11948): [<ffffff8008081da8>] __do_softirq+0x160/0x4ec softirqs last disabled at (11935): [<ffffff80080ec948>] irq_exit+0xa0/0xfc other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&(&rchan->lock)->rlock); <Interrupt> lock(&(&rchan->lock)->rlock); *** DEADLOCK *** 3 locks held by reboot/2779: #0: 00000000bfabfa74 (reboot_mutex){+.+.}, at: sys_reboot+0xdc/0x208 #1: 00000000c75d8c3a (&dev->mutex){....}, at: device_shutdown+0xc8/0x1c4 #2: 00000000ebec58ec (&dev->mutex){....}, at: device_shutdown+0xd8/0x1c4 stack backtrace: CPU: 6 PID: 2779 Comm: reboot Tainted: G W 4.18.0-rc1-salvator-x-00002-g9203dbec90a68103 #41 Hardware name: Renesas Salvator-X 2nd version board based on r8a7795 ES2.0+ (DT) Call trace: dump_backtrace+0x0/0x148 show_stack+0x14/0x1c dump_stack+0xb0/0xf0 print_usage_bug.part.26+0x1c4/0x27c mark_lock+0x38c/0x610 __lock_acquire+0x3fc/0x14d4 lock_acquire+0x208/0x238 _raw_spin_lock+0x40/0x54 rcar_dmac_shutdown+0x58/0x6c platform_drv_shutdown+0x20/0x2c device_shutdown+0x160/0x1c4 kernel_restart_prepare+0x34/0x3c kernel_restart+0x14/0x5c sys_reboot+0x160/0x208 el0_svc_naked+0x30/0x34 rcar_dmac_stop_all_chan() takes the channel lock while stopping a channel, but does not disable interrupts, leading to a deadlock when a DMAC interrupt comes in. Before, the same code block was called from an interrupt handler, hence taking the spinlock was sufficient. Fix this by disabling local interrupts while taking the spinlock. Fixes: 9203dbec90a68103 ("dmaengine: rcar-dmac: don't use DMAC error interrupt") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-09dmaengine: nbpfaxi: Mark expected switch fall-throughGustavo A. R. Silva1-0/+1
In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-07headers: separate linux/mod_devicetable.h from linux/platform_device.hRandy Dunlap2-0/+2
At over 4000 #includes, <linux/platform_device.h> is the 9th most #included header file in the Linux kernel. It does not need <linux/mod_devicetable.h>, so drop that header and explicitly add <linux/mod_devicetable.h> to source files that need it. 4146 #include <linux/platform_device.h> After this patch, there are 225 files that use <linux/mod_devicetable.h>, for a reduction of around 3900 times that <linux/mod_devicetable.h> does not have to be read & parsed. 225 #include <linux/mod_devicetable.h> This patch was build-tested on 20 different arch-es. It also makes these drivers SubmitChecklist#1 compliant. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Reported-by: kbuild test robot <lkp@intel.com> # drivers/media/platform/vimc/ Reported-by: kbuild test robot <lkp@intel.com> # drivers/pinctrl/pinctrl-u300.c Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-07-06dmaengine: rcar-dmac: convert to SPDX identifiersKuninori Morimoto1-4/+1
This patch is using C++ comment style for SPDX line only, because driver author want it. Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-06dmaengine: imx-sdma: add missing structure descriptionRobin Gong1-28/+57
Some member description or colons missing cause build warning with 'W=1' as below: drivers/dma/imx-sdma.c:326: warning: Function parameter or member 'vd' not described in 'sdma_desc' drivers/dma/imx-sdma.c:326: warning: Function parameter or member 'num_bd' not described in 'sdma_desc' drivers/dma/imx-sdma.c:326: warning: Function parameter or member 'bd_phys' not described in 'sdma_desc' drivers/dma/imx-sdma.c:326: warning: Function parameter or member 'buf_tail' not described in 'sdma_desc' drivers/dma/imx-sdma.c:326: warning: Function parameter or member 'buf_ptail' not described in 'sdma_desc' drivers/dma/imx-sdma.c:326: warning: Function parameter or member 'period_len' not described in 'sdma_desc' drivers/dma/imx-sdma.c:326: warning: Function parameter or member 'chn_real_count' not described in 'sdma_desc' drivers/dma/imx-sdma.c:326: warning: Function parameter or member 'chn_count' not described in 'sdma_desc Signed-off-by: Robin Gong <yibin.gong@nxp.com> Reported-by: Vinod Koul <vkoul@kernel.org> Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-02dmaengine: imx-sdma: remove unused variableVinod Koul1-5/+2
The variable is no longer used, though it is set, so remove it drivers/dma/imx-sdma.c:1298:6: warning: variable ‘ret’ set but not used [-Wunused-but-set-variable] int ret, i, count; ^~~ Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-02dmaengine: imx-sdma: Use GFP_NOWAIT for dma allocationsVinod Koul1-2/+2
The memory allocation in DMA callbacks should use GFP_NOWAIT, so update this one and fix code alignment for this call while at it. Signed-off-by: Vinod Koul <vkoul@kernel.org>
2018-07-02dmaengine: imx-sdma: Fix some typosVinod Koul1-3/+3
Signed-off-by: Vinod Koul <vkoul@kernel.org>
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