Hi,
I am running linux-next 20170824 on a imx6q-sabresd and getting the warnings below.
Any ideas as to why 'asound/pcm' is getting registered twice?
Thanks
[ 3.842972] fsl-ssi-dai 202c000.ssi: No cache defaults, reading back from HW [ 3.859270] input: WM8962 Beep Generator as /devices/soc0/soc/2100000.aips-bus/21a0000.i2c/i2c-0/0-001a/input/input1 [ 3.921494] ------------[ cut here ]------------ [ 3.926181] WARNING: CPU: 1 PID: 1 at fs/proc/generic.c:330 proc_register+0xc8/0x13c [ 3.934020] proc_dir_entry 'asound/pcm' already registered [ 3.939609] Modules linked in: [ 3.942712] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.13.0-rc6-next-20170824 #49 [ 3.950301] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree) [ 3.956849] Backtrace: [ 3.959340] [<c010ca24>] (dump_backtrace) from [<c010ccf4>] (show_stack+0x18/0x1c) [ 3.966933] r7:00000000 r6:60000013 r5:00000000 r4:c0e79b80 [ 3.972620] [<c010ccdc>] (show_stack) from [<c09ca560>] (dump_stack+0xb4/0xe8) [ 3.979869] [<c09ca4ac>] (dump_stack) from [<c0125654>] (__warn+0xd8/0x104) [ 3.986856] r9:c029892c r8:0000014a r7:00000009 r6:c0c06374 r5:00000000 r4:ec069b48 [ 3.994623] [<c012557c>] (__warn) from [<c01256bc>] (warn_slowpath_fmt+0x3c/0x44) [ 4.002129] r9:ec338f2c r8:00000000 r7:ec338f00 r6:00000001 r5:ec887b40 r4:c0c06404 [ 4.009898] [<c0125684>] (warn_slowpath_fmt) from [<c029892c>] (proc_register+0xc8/0x13c) [ 4.018096] r3:ec338f7d r2:c0c06404 [ 4.021691] r4:ec12c874 [ 4.024254] [<c0298864>] (proc_register) from [<c0298c64>] (proc_create_data+0x80/0xc4) [ 4.032281] r10:ec8a9e00 r9:00000000 r8:00000000 r7:ec138000 r6:ec887a80 r5:c0a900f0 [ 4.040130] r4:ec887b40 [ 4.042695] [<c0298be4>] (proc_create_data) from [<c075456c>] (snd_info_register+0x6c/0xd4) [ 4.051066] r5:ec338f00 r4:ec887a80 [ 4.054670] [<c0754500>] (snd_info_register) from [<c07590ac>] (snd_pcm_new_stream+0x15c/0x454) [ 4.063388] r5:ec145800 r4:00000000 [ 4.066987] [<c0758f50>] (snd_pcm_new_stream) from [<c0759a54>] (_snd_pcm_new+0xb4/0x13c) [ 4.075188] r10:00000000 r9:00000000 r8:00000001 r7:ec138000 r6:ec069ca4 r5:ec069ca8 [ 4.083036] r4:ec145800 [ 4.085593] [<c07599a0>] (_snd_pcm_new) from [<c0759afc>] (snd_pcm_new+0x20/0x28) [ 4.093100] r10:ec069ca8 r9:00000001 r8:ec132c80 r7:00000000 r6:ec8a9a0c r5:00000001 [ 4.100948] r4:00000001 r3:00000001 [ 4.104550] [<c0759adc>] (snd_pcm_new) from [<c0777c0c>] (soc_new_pcm+0x12c/0x45c) [ 4.112139] r4:ec144800 [ 4.114700] [<c0777ae0>] (soc_new_pcm) from [<c076b658>] (snd_soc_register_card+0xc40/0xe38) [ 4.123162] r10:ec144800 r9:ec8cd810 r8:00000002 r7:ec8cd898 r6:ec8cd9d4 r5:ec8cd978 [ 4.131011] r4:c0c8dcb8 [ 4.133570] [<c076aa18>] (snd_soc_register_card) from [<c0778474>] (devm_snd_soc_register_card+0x38/0x78) [ 4.143161] r10:ec224400 r9:ec8cd810 r8:c0aaf308 r7:ec284c10 r6:ec8cd898 r5:ec89b150 [ 4.151009] r4:ec8cd898 [ 4.153575] [<c077843c>] (devm_snd_soc_register_card) from [<c07913a4>] (imx_wm8962_probe+0x244/0x37c) [ 4.162905] r7:ef7d9650 r6:ec284c10 r5:ec284c00 r4:ec8cd898 [ 4.168595] [<c0791160>] (imx_wm8962_probe) from [<c0546780>] (platform_drv_probe+0x54/0xb8) [ 4.177056] r10:00000000 r9:00000000 r8:c0e70228 r7:fffffdfb r6:c0e70228 r5:ec284c10 [ 4.184904] r4:ec284c10 [ 4.187470] [<c054672c>] (platform_drv_probe) from [<c0544bf4>] (driver_probe_device+0x274/0x2fc) [ 4.196365] r7:c15e6c10 r6:00000000 r5:c15e6c0c r4:ec284c10 [ 4.202051] [<c0544980>] (driver_probe_device) from [<c0544d44>] (__driver_attach+0xc8/0xcc) [ 4.210513] r10:c0d00618 r9:c0d6089c r8:00000000 r7:00000000 r6:ec284c44 r5:c0e70228 [ 4.218361] r4:ec284c10 r3:00000000 [ 4.221964] [<c0544c7c>] (__driver_attach) from [<c0542ebc>] (bus_for_each_dev+0x74/0xa8) [ 4.230164] r7:00000000 r6:c0544c7c r5:c0e70228 r4:00000000 [ 4.235852] [<c0542e48>] (bus_for_each_dev) from [<c0544530>] (driver_attach+0x20/0x28) [ 4.243876] r6:c0e3b288 r5:ec132300 r4:c0e70228 [ 4.248520] [<c0544510>] (driver_attach) from [<c054402c>] (bus_add_driver+0x190/0x218) [ 4.256549] [<c0543e9c>] (bus_add_driver) from [<c05456e4>] (driver_register+0x80/0x100) [ 4.264662] r7:c0cf5ec4 r6:c0d60894 r5:c0d4e44c r4:c0e70228 [ 4.270347] [<c0545664>] (driver_register) from [<c05466d4>] (__platform_driver_register+0x38/0x4c) [ 4.279412] r5:c0d4e44c r4:ffffe000 [ 4.283020] [<c054669c>] (__platform_driver_register) from [<c0d4e464>] (imx_wm8962_driver_init+0x18/0x20) [ 4.292702] [<c0d4e44c>] (imx_wm8962_driver_init) from [<c0101c54>] (do_one_initcall+0x44/0x17c) [ 4.301517] [<c0101c10>] (do_one_initcall) from [<c0d00e7c>] (kernel_init_freeable+0x118/0x1d0) [ 4.310238] r8:000000f1 r7:c0cf5ec4 r6:c0d60894 r5:c0e7d000 r4:c0d710e0 [ 4.316967] [<c0d00d64>] (kernel_init_freeable) from [<c09de898>] (kernel_init+0x10/0x118) [ 4.325254] r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:c09de888 [ 4.333102] r4:00000000 [ 4.335665] [<c09de888>] (kernel_init) from [<c01080f8>] (ret_from_fork+0x14/0x3c) [ 4.343255] r5:c09de888 r4:00000000 [ 4.346962] ---[ end trace 3ea29ef261f4780c ]--- [ 4.351955] ------------[ cut here ]------------ [ 4.356611] WARNING: CPU: 1 PID: 1 at fs/proc/generic.c:330 proc_register+0xc8/0x13c [ 4.364434] proc_dir_entry 'asound/pcm' already registered [ 4.369982] Modules linked in: [ 4.373083] CPU: 1 PID: 1 Comm: swapper/0 Tainted: G W 4.13.0-rc6-next-20170824 #49 [ 4.381887] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree) [ 4.388433] Backtrace: [ 4.390918] [<c010ca24>] (dump_backtrace) from [<c010ccf4>] (show_stack+0x18/0x1c) [ 4.398512] r7:00000000 r6:60000013 r5:00000000 r4:c0e79b80 [ 4.404196] [<c010ccdc>] (show_stack) from [<c09ca560>] (dump_stack+0xb4/0xe8) [ 4.411443] [<c09ca4ac>] (dump_stack) from [<c0125654>] (__warn+0xd8/0x104) [ 4.418430] r9:c029892c r8:0000014a r7:00000009 r6:c0c06374 r5:00000000 r4:ec069b48 [ 4.426196] [<c012557c>] (__warn) from [<c01256bc>] (warn_slowpath_fmt+0x3c/0x44) [ 4.433703] r9:ec338f2c r8:00000000 r7:ec338f00 r6:00000001 r5:ec88c480 r4:c0c06404 [ 4.441470] [<c0125684>] (warn_slowpath_fmt) from [<c029892c>] (proc_register+0xc8/0x13c) [ 4.449668] r3:ec338f7d r2:c0c06404 [ 4.453263] r4:ec12c874 [ 4.455822] [<c0298864>] (proc_register) from [<c0298c64>] (proc_create_data+0x80/0xc4) [ 4.463850] r10:ec8c8000 r9:00000001 r8:00000000 r7:ec138000 r6:ec88c3c0 r5:c0a900f0 [ 4.471698] r4:ec88c480 [ 4.474261] [<c0298be4>] (proc_create_data) from [<c075456c>] (snd_info_register+0x6c/0xd4) [ 4.482632] r5:ec338f00 r4:ec88c3c0 [ 4.486234] [<c0754500>] (snd_info_register) from [<c07590ac>] (snd_pcm_new_stream+0x15c/0x454) [ 4.494953] r5:ec145800 r4:00000000 [ 4.498552] [<c0758f50>] (snd_pcm_new_stream) from [<c0759a6c>] (_snd_pcm_new+0xcc/0x13c) [ 4.506753] r10:00000000 r9:00000000 r8:00000001 r7:ec138000 r6:ec069ca4 r5:00000000 [ 4.514601] r4:ec145800 [ 4.517159] [<c07599a0>] (_snd_pcm_new) from [<c0759afc>] (snd_pcm_new+0x20/0x28) [ 4.524665] r10:ec069ca8 r9:00000001 r8:ec132c80 r7:00000000 r6:ec8a9a0c r5:00000001 [ 4.532513] r4:00000001 r3:00000001 [ 4.536112] [<c0759adc>] (snd_pcm_new) from [<c0777c0c>] (soc_new_pcm+0x12c/0x45c) [ 4.543700] r4:ec144800 [ 4.546260] [<c0777ae0>] (soc_new_pcm) from [<c076b658>] (snd_soc_register_card+0xc40/0xe38) [ 4.554721] r10:ec144800 r9:ec8cd810 r8:00000002 r7:ec8cd898 r6:ec8cd9d4 r5:ec8cd978 [ 4.562569] r4:c0c8dcb8 [ 4.565129] [<c076aa18>] (snd_soc_register_card) from [<c0778474>] (devm_snd_soc_register_card+0x38/0x78) [ 4.574719] r10:ec224400 r9:ec8cd810 r8:c0aaf308 r7:ec284c10 r6:ec8cd898 r5:ec89b150 [ 4.582567] r4:ec8cd898 [ 4.585132] [<c077843c>] (devm_snd_soc_register_card) from [<c07913a4>] (imx_wm8962_probe+0x244/0x37c) [ 4.594460] r7:ef7d9650 r6:ec284c10 r5:ec284c00 r4:ec8cd898 [ 4.600146] [<c0791160>] (imx_wm8962_probe) from [<c0546780>] (platform_drv_probe+0x54/0xb8) [ 4.608607] r10:00000000 r9:00000000 r8:c0e70228 r7:fffffdfb r6:c0e70228 r5:ec284c10 [ 4.616455] r4:ec284c10 [ 4.619019] [<c054672c>] (platform_drv_probe) from [<c0544bf4>] (driver_probe_device+0x274/0x2fc) [ 4.627913] r7:c15e6c10 r6:00000000 r5:c15e6c0c r4:ec284c10 [ 4.633600] [<c0544980>] (driver_probe_device) from [<c0544d44>] (__driver_attach+0xc8/0xcc) [ 4.642062] r10:c0d00618 r9:c0d6089c r8:00000000 r7:00000000 r6:ec284c44 r5:c0e70228 [ 4.649910] r4:ec284c10 r3:00000000 [ 4.653512] [<c0544c7c>] (__driver_attach) from [<c0542ebc>] (bus_for_each_dev+0x74/0xa8) [ 4.661711] r7:00000000 r6:c0544c7c r5:c0e70228 r4:00000000 [ 4.667397] [<c0542e48>] (bus_for_each_dev) from [<c0544530>] (driver_attach+0x20/0x28) [ 4.675421] r6:c0e3b288 r5:ec132300 r4:c0e70228 [ 4.680064] [<c0544510>] (driver_attach) from [<c054402c>] (bus_add_driver+0x190/0x218) [ 4.688093] [<c0543e9c>] (bus_add_driver) from [<c05456e4>] (driver_register+0x80/0x100) [ 4.696206] r7:c0cf5ec4 r6:c0d60894 r5:c0d4e44c r4:c0e70228 [ 4.701889] [<c0545664>] (driver_register) from [<c05466d4>] (__platform_driver_register+0x38/0x4c) [ 4.710954] r5:c0d4e44c r4:ffffe000 [ 4.714558] [<c054669c>] (__platform_driver_register) from [<c0d4e464>] (imx_wm8962_driver_init+0x18/0x20) [ 4.724239] [<c0d4e44c>] (imx_wm8962_driver_init) from [<c0101c54>] (do_one_initcall+0x44/0x17c) [ 4.733053] [<c0101c10>] (do_one_initcall) from [<c0d00e7c>] (kernel_init_freeable+0x118/0x1d0) [ 4.741774] r8:000000f1 r7:c0cf5ec4 r6:c0d60894 r5:c0e7d000 r4:c0d710e0 [ 4.748502] [<c0d00d64>] (kernel_init_freeable) from [<c09de898>] (kernel_init+0x10/0x118) [ 4.756789] r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:c09de888 [ 4.764637] r4:00000000 [ 4.767197] [<c09de888>] (kernel_init) from [<c01080f8>] (ret_from_fork+0x14/0x3c) [ 4.774787] r5:c09de888 r4:00000000 [ 4.778454] ---[ end trace 3ea29ef261f4780d ]---