Noralf Trønnes b6bc202494 tinydrm/mipi-dbi: Use dma-safe buffers for all SPI transfers ... [ Upstream commit a89bfc5d9a0732d84b4de311e27133daa0586316 ] Buffers passed to spi_sync() must be dma-safe even for tiny buffers since some SPI controllers use DMA for all transfers. Example splat with CONFIG_DMA_API_DEBUG enabled: [ 23.750467] DMA-API: dw_dmac_pci 0000:00:15.0: device driver maps memory from stack [probable addr=000000001e49185d] [ 23.750529] WARNING: CPU: 1 PID: 1296 at kernel/dma/debug.c:1161 check_for_stack+0xb7/0x190 [ 23.750533] Modules linked in: mmc_block(+) spi_pxa2xx_platform(+) pwm_lpss_pci pwm_lpss spi_pxa2xx_pci sdhci_pci cqhci intel_mrfld_pwrbtn extcon_intel_mrfld sdhci intel_mrfld_adc led_class mmc_core ili9341 mipi_dbi tinydrm backlight ti_ads7950 industrialio_triggered_buffer kfifo_buf intel_soc_pmic_mrfld hci_uart btbcm [ 23.750599] CPU: 1 PID: 1296 Comm: modprobe Not tainted 5.0.0-rc7+ #236 [ 23.750605] Hardware name: Intel Corporation Merrifield/BODEGA BAY, BIOS 542 2015.01.21:18.19.48 [ 23.750620] RIP: 0010:check_for_stack+0xb7/0x190 [ 23.750630] Code: 8b 6d 50 4d 85 ed 75 04 4c 8b 6d 10 48 89 ef e8 2f 8b 44 00 48 89 c6 4a 8d 0c 23 4c 89 ea 48 c7 c7 88 d0 82 b4 e8 40 7c f9 ff <0f> 0b 8b 05 79 00 4b 01 85 c0 74 07 5b 5d 41 5c 41 5d c3 8b 05 54 [ 23.750637] RSP: 0000:ffff97bbc0292fa0 EFLAGS: 00010286 [ 23.750646] RAX: 0000000000000000 RBX: ffff97bbc0290000 RCX: 0000000000000006 [ 23.750652] RDX: 0000000000000007 RSI: 0000000000000002 RDI: ffff94b33e115450 [ 23.750658] RBP: ffff94b33c8578b0 R08: 0000000000000002 R09: 00000000000201c0 [ 23.750664] R10: 00000006ecb0ccc6 R11: 0000000000034f38 R12: 000000000000316c [ 23.750670] R13: ffff94b33c84b250 R14: ffff94b33dedd5a0 R15: 0000000000000001 [ 23.750679] FS: 0000000000000000(0000) GS:ffff94b33e100000(0063) knlGS:00000000f7faf690 [ 23.750686] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 23.750691] CR2: 00000000f7f54faf CR3: 000000000722c000 CR4: 00000000001006e0 [ 23.750696] Call Trace: [ 23.750713] debug_dma_map_sg+0x100/0x340 [ 23.750727] ? dma_direct_map_sg+0x3b/0xb0 [ 23.750739] spi_map_buf+0x25a/0x300 [ 23.750751] __spi_pump_messages+0x2a4/0x680 [ 23.750762] __spi_sync+0x1dd/0x1f0 [ 23.750773] spi_sync+0x26/0x40 [ 23.750790] mipi_dbi_typec3_command_read+0x14d/0x240 [mipi_dbi] [ 23.750802] ? spi_finalize_current_transfer+0x10/0x10 [ 23.750821] mipi_dbi_typec3_command+0x1bc/0x1d0 [mipi_dbi] Reported-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Noralf Trønnes <noralf@tronnes.org> Tested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190222124329.23046-1-noralf@tronnes.org Signed-off-by: Sasha Levin <sashal@kernel.org>		2019-05-31 06:46:32 -07:00
..
bridge	drm for v4.18-rc1	2018-06-06 08:16:33 -07:00
i2c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
tinydrm	tinydrm/mipi-dbi: Use dma-safe buffers for all SPI transfers	2019-05-31 06:46:32 -07:00
ttm	drm/ttm: Add ttm_set_pages_wc and ttm_set_pages_uc helper	2018-08-01 17:23:05 -05:00
amd_asic_type.h	drm/amdgpu: Add vega20 to asic_type enum.	2018-05-17 10:13:09 -05:00
ati_pcigart.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
drm_agpsupport.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
drm_atomic.h	drm: Get ref on CRTC commit object when waiting for flip_done	2018-10-18 14:23:13 -04:00
drm_atomic_helper.h	drm/crtc: Add a generic infrastructure to fake VBLANK events	2018-07-07 07:53:09 +02:00
drm_audio_component.h	ALSA: hda: Make audio component support more generic	2018-07-17 22:25:48 +02:00
drm_auth.h	drm: Add drm_object lease infrastructure [v5]	2017-10-25 16:31:29 +10:00
drm_blend.h	drm/blend: Add a generic alpha property	2018-04-16 21:17:29 +02:00
drm_bridge.h	drm/bridge: Move the struct drm_bridge member kerneldoc inline.	2018-06-21 14:00:06 -07:00
drm_cache.h	drm: disable uncached DMA optimization for ARM and arm64	2019-03-13 14:02:40 -07:00
drm_client.h	drm/cma-helper: Fix crash in fbdev error path	2018-10-02 13:03:34 +02:00
drm_color_mgmt.h	drm: Introduce drm_color_lut_size()	2018-03-16 15:44:01 +02:00
drm_connector.h	drm: drop _mode_ from remaining connector functions	2018-07-13 18:40:27 +02:00
drm_crtc.h	drm/doc: use inline kerneldoc style for drm_crtc_state	2018-07-13 18:40:28 +02:00
drm_crtc_helper.h	drm: Allow determining if current task is output poll worker	2018-02-16 22:30:06 +01:00
drm_debugfs.h	drm/debugfs: Add kerneldoc	2017-03-24 09:36:06 +01:00
drm_debugfs_crc.h	drm/crc: Only report a single overflow when a CRC fd is opened	2018-07-06 14:57:03 +02:00
drm_device.h	drm: Begin an API for in-kernel clients	2018-07-10 14:51:37 +02:00
drm_displayid.h	drm/edid: add displayid detailed 1 timings to the modelist. (v1.1)	2016-05-23 11:35:31 +10:00
drm_dp_dual_mode_helper.h	drm: Fix LSPCON kernel-doc	2016-10-19 18:20:40 +03:00
drm_dp_helper.h	drm: add support for DisplayPort CEC-Tunneling-over-AUX	2018-07-13 17:58:19 +03:00
drm_dp_mst_helper.h	drm/dp/mst: Sideband message transaction to power up/down nodes	2017-09-11 16:03:57 +03:00
drm_drv.h	drm: fix drm_drv_uses_atomic_modeset on non modesetting drivers.	2018-09-18 11:17:06 +02:00
drm_edid.h	drm/edid: VSDB yCBCr420 Deep Color mode bit definitions	2018-10-16 16:38:16 +03:00
drm_encoder.h	drm: Add drm_encoder_mask()	2018-07-02 18:45:55 +03:00
drm_encoder_slave.h	drm: Don't include <drm/drm_encoder.h> in <drm/drm_crtc.h>	2016-12-18 16:29:29 +05:30
drm_fb_cma_helper.h	drm/cma-helper: Remove drm_fb_cma_fbdev_init_with_funcs()	2018-07-10 14:54:50 +02:00
drm_fb_helper.h	drm/fb-helper: Finish the generic fbdev emulation	2018-07-10 14:54:09 +02:00
drm_file.h	drm: writeback: Add client capability for exposing writeback connectors	2018-06-20 15:30:20 +01:00
drm_fixed.h
drm_flip_work.h	drm/kms-helpers: Use recommened kerneldoc for struct member refs	2017-01-25 16:18:57 +01:00
drm_fourcc.h	drm/fourcc: Add is_yuv field to drm_format_info to denote if the format is yuv	2018-07-18 16:56:45 +01:00
drm_framebuffer.h	drm/framebuffer: Print task that allocated the fb in debug info.	2017-12-20 15:30:17 +01:00
drm_gem.h	drm: move read_domains and write_domain into i915	2018-02-16 14:12:48 +00:00
drm_gem_cma_helper.h	Merge tag 'drm-misc-next-2017-11-30' of git://anongit.freedesktop.org/drm/drm-misc into drm-next	2017-12-04 05:42:49 +10:00
drm_gem_framebuffer_helper.h	drm: Move simple_display_pipe prepare_fb helper into gem fb helpers	2018-04-24 13:57:22 +02:00
drm_global.h	drm: drop extern from function decls	2017-03-24 09:36:06 +01:00
drm_hashtab.h	drm: drop extern from function decls	2017-03-24 09:36:06 +01:00
drm_hdcp.h	drm: Fix HDCP downstream dev count read	2018-04-16 12:10:48 -04:00
drm_ioctl.h	drm: remove all control node code	2018-05-03 21:26:32 +02:00
drm_irq.h	drm: Extract drm_vblank.[hc]	2017-06-01 08:02:14 +02:00
drm_lease.h	drm: Add four ioctls for managing drm mode object leases [v7]	2017-10-25 16:31:30 +10:00
drm_legacy.h	drm: prefer inline over __inline__	2018-03-28 09:34:12 +03:00
drm_mipi_dsi.h	drm/dsi: Implement DCS set/get display brightness	2016-08-24 13:34:00 +02:00
drm_mm.h	drm/mm: Add a search-by-address variant to only inspect a single hole	2018-05-24 15:04:30 +01:00
drm_mode_config.h	drm: Document mode_config.max_width/height as the max fb dimensions	2018-06-21 19:16:07 +03:00
drm_mode_object.h	drm: remove drm_mode_object_{un/reference} aliases	2018-03-19 09:09:46 -04:00
drm_modes.h	drm: drop _mode_ from remaining connector functions	2018-07-13 18:40:27 +02:00
drm_modeset_helper.h	drm/modeset-helper: Add simple modeset suspend/resume helpers	2017-11-30 18:18:08 +01:00
drm_modeset_helper_vtables.h	drm: drop _mode_ from update_edit_property()	2018-07-13 18:40:27 +02:00
drm_modeset_lock.h	drm/atomic: Prepare drm_modeset_lock infrastructure for interruptible waiting, v2.	2017-09-13 09:50:52 +02:00
drm_of.h	drm: of: Export and rename drm_crtc_port_mask()	2018-06-27 21:44:04 +02:00
drm_os_linux.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
drm_panel.h	Revert "drm/panel: Add device_link from panel device to DRM device"	2018-09-27 11:00:42 -04:00
drm_pci.h	drm: drop drm_pcie_get_speed_cap_mask and drm_pcie_get_max_link_width	2018-07-05 16:40:00 -05:00
drm_pciids.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
drm_plane.h	drm: switch drm_plane to inline comments	2018-07-13 18:40:28 +02:00
drm_plane_helper.h	drm: add missing ctx argument to plane transitional helpers	2018-07-03 09:30:19 +02:00
drm_prime.h	dma-buf: remove kmap_atomic interface	2018-06-20 15:59:34 +02:00
drm_print.h	drm: Add puts callback for the coredump printer	2018-07-30 08:49:41 -04:00
drm_property.h	drm: Fix kerneldoc for DRM_MODE_PROP_IMMUTABLE	2018-07-13 12:18:03 -04:00
drm_rect.h	drm/rect: Handle rounding errors in drm_rect_clip_scaled, v3.	2018-05-04 11:09:54 +02:00
drm_scdc_helper.h	drm: Fix warning when building docs for scdc_helper	2017-07-31 14:24:14 +02:00
drm_simple_kms_helper.h	drm: Move simple_display_pipe prepare_fb helper into gem fb helpers	2018-04-24 13:57:22 +02:00
drm_syncobj.h	drm/syncobj: some kerneldoc polish	2017-12-15 11:26:52 +01:00
drm_sysfs.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
drm_utils.h	drm: Add panel orientation quirks, v6.	2017-12-04 23:03:21 +01:00
drm_vblank.h	Merge tag 'drm-intel-next-2018-02-21' of git://anongit.freedesktop.org/drm/drm-intel into drm-next	2018-03-01 14:07:22 +10:00
drm_vma_manager.h	drm/i915: Prevent writing into a read-only object via a GGTT mmap	2018-07-13 16:14:04 +01:00
drm_writeback.h	drm/atomic: Avoid connector to writeback_connector casts	2018-07-07 07:51:19 +02:00
drmP.h	drm: move drv test macros out of drmP.h	2018-07-13 18:40:27 +02:00
gma_drm.h
gpu_scheduler.h	drm/scheduler: only kill entity if last user is killed v2	2018-07-31 16:58:20 -05:00
i915_component.h	drm/i915: Split audio component to a generic type	2018-07-17 22:25:19 +02:00
i915_drm.h	x86/gpu: reserve ICL's graphics stolen memory	2018-07-10 16:28:47 -07:00
i915_pciids.h	drm/i915/aml: Introducing Amber Lake platform	2018-06-18 10:49:57 -07:00
intel-gtt.h	drm/i915: prefer resource_size_t for everything stolen	2017-12-12 12:30:22 +02:00
intel_lpe_audio.h	ALSA: x86: Register multiple PCM devices for the LPE audio card	2017-05-03 16:24:00 +03:00
spsc_queue.h	drm: move amd_gpu_scheduler into common location	2017-12-07 11:51:56 -05:00