mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-27 22:24:11 +08:00
011a8719d6
When using DMA mode we are facing with Oops: [ 396.458157] Unable to handle kernel access to user memory without uaccess routines at virtual address 000000000000000c [ 396.469374] Oops [#1] [ 396.471839] Modules linked in: [ 396.475144] CPU: 0 PID: 114 Comm: arecord Not tainted 6.0.0-00164-g9a8eccdaf2be-dirty #68 [ 396.483619] Hardware name: YMP ELCT FPGA (DT) [ 396.488156] epc : dmaengine_pcm_open+0x1d2/0x342 [ 396.493227] ra : dmaengine_pcm_open+0x1d2/0x342 [ 396.498140] epc : ffffffff807fe346 ra : ffffffff807fe346 sp : ffffffc804e138f0 [ 396.505602] gp : ffffffff817bf730 tp : ffffffd8042c8ac0 t0 : 6500000000000000 [ 396.513045] t1 : 0000000000000064 t2 : 656e69676e65616d s0 : ffffffc804e13990 [ 396.520477] s1 : ffffffd801b86a18 a0 : 0000000000000026 a1 : ffffffff816920f8 [ 396.527897] a2 : 0000000000000010 a3 : fffffffffffffffe a4 : 0000000000000000 [ 396.535319] a5 : 0000000000000000 a6 : ffffffd801b87040 a7 : 0000000000000038 [ 396.542740] s2 : ffffffd801b94a00 s3 : 0000000000000000 s4 : ffffffd80427f5e8 [ 396.550153] s5 : ffffffd80427f5e8 s6 : ffffffd801b44410 s7 : fffffffffffffff5 [ 396.557569] s8 : 0000000000000800 s9 : 0000000000000001 s10: ffffffff8066d254 [ 396.564978] s11: ffffffd8059cf768 t3 : ffffffff817d5577 t4 : ffffffff817d5577 [ 396.572391] t5 : ffffffff817d5578 t6 : ffffffc804e136e8 [ 396.577876] status: 0000000200000120 badaddr: 000000000000000c cause: 000000000000000d [ 396.586007] [<ffffffff806839f4>] snd_soc_component_open+0x1a/0x68 [ 396.592439] [<ffffffff807fdd62>] __soc_pcm_open+0xf0/0x502 [ 396.598217] [<ffffffff80685d86>] soc_pcm_open+0x2e/0x4e [ 396.603741] [<ffffffff8066cea4>] snd_pcm_open_substream+0x442/0x68e [ 396.610313] [<ffffffff8066d1ea>] snd_pcm_open+0xfa/0x212 [ 396.615868] [<ffffffff8066d39c>] snd_pcm_capture_open+0x3a/0x60 [ 396.622048] [<ffffffff8065b35a>] snd_open+0xa8/0x17a [ 396.627421] [<ffffffff801ae036>] chrdev_open+0xa0/0x218 [ 396.632893] [<ffffffff801a5a28>] do_dentry_open+0x17c/0x2a6 [ 396.638713] [<ffffffff801a6d9a>] vfs_open+0x1e/0x26 [ 396.643850] [<ffffffff801b8544>] path_openat+0x96e/0xc96 [ 396.649518] [<ffffffff801b9390>] do_filp_open+0x7c/0xf6 [ 396.655034] [<ffffffff801a6ff2>] do_sys_openat2+0x8a/0x11e [ 396.660765] [<ffffffff801a735a>] sys_openat+0x50/0x7c [ 396.666068] [<ffffffff80003aca>] ret_from_syscall+0x0/0x2 [ 396.674964] ---[ end trace 0000000000000000 ]--- It happens because of play_dma_data/capture_dma_data pointers are NULL. Current implementation assigns these pointers at snd_soc_dai_driver startup() callback and reset them back to NULL at shutdown(). But soc_pcm_open() sequence uses DMA pointers in dmaengine_pcm_open() before snd_soc_dai_driver startup(). Most generic DMA capable I2S drivers use snd_soc_dai_driver probe() callback to init DMA pointers only once at probe. So move DMA init to dw_i2s_dai_probe and drop shutdown() and startup() callbacks. Signed-off-by: Maxim Kochetkov <fido_max@inbox.ru> Link: https://lore.kernel.org/r/20230512110343.66664-1-fido_max@inbox.ru Signed-off-by: Mark Brown <broonie@kernel.org> |
||
|---|---|---|
| .. | ||
| adi | ||
| amd | ||
| apple | ||
| atmel | ||
| au1x | ||
| bcm | ||
| cirrus | ||
| codecs | ||
| dwc | ||
| fsl | ||
| generic | ||
| hisilicon | ||
| img | ||
| intel | ||
| jz4740 | ||
| kirkwood | ||
| mediatek | ||
| meson | ||
| mxs | ||
| pxa | ||
| qcom | ||
| rockchip | ||
| samsung | ||
| sh | ||
| sof | ||
| spear | ||
| sprd | ||
| sti | ||
| stm | ||
| sunxi | ||
| tegra | ||
| ti | ||
| uniphier | ||
| ux500 | ||
| xilinx | ||
| xtensa | ||
| Kconfig | ||
| Makefile | ||
| soc-ac97.c | ||
| soc-acpi.c | ||
| soc-card.c | ||
| soc-component.c | ||
| soc-compress.c | ||
| soc-core.c | ||
| soc-dai.c | ||
| soc-dapm.c | ||
| soc-devres.c | ||
| soc-generic-dmaengine-pcm.c | ||
| soc-jack.c | ||
| soc-link.c | ||
| soc-ops.c | ||
| soc-pcm.c | ||
| soc-topology-test.c | ||
| soc-topology.c | ||
| soc-utils-test.c | ||
| soc-utils.c | ||