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Date: Mon, 1 Feb 2016 19:58:54 -0200 From: Fabio Estevam <festevam@...il.com> To: Mark Brown <broonie@...nel.org> Cc: "Maciej S. Szmigiero" <mail@...iej.szmigiero.name>, "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>, Nicolin Chen <nicoleotsuka@...il.com>, linux-kernel <linux-kernel@...r.kernel.org> Subject: Re: [PATCH 2/2] regmap: cache: Fall back to register by register read for cache defaults Hi Mark, On Mon, Feb 1, 2016 at 7:41 PM, Mark Brown <broonie@...nel.org> wrote: > On Mon, Feb 01, 2016 at 09:38:15PM +0000, Mark Brown wrote: >> If we are unable to read the cache defaults for a regmap then fall back >> on attempting to read them word by word. This is going to be painfully >> slow for large regmaps but might be adequate for smaller ones. > > Competely untested, hopefully it helps fix the issues with the SSI. After applying this series I get: [ 2.070023] fsl-asoc-card sound: ASoC: CPU DAI (null) not registered [ 2.076440] fsl-asoc-card sound: snd_soc_register_card failed (-517) [ 2.085572] fsl-ssi-dai 202c000.ssi: No cache defaults, reading back from HW [ 2.092998] Unable to handle kernel NULL pointer dereference at virtual address 00000004 [ 2.101121] pgd = c0004000 [ 2.103847] [00000004] *pgd=00000000 [ 2.107470] Internal error: Oops: 5 [#1] SMP ARM [ 2.112105] Modules linked in: [ 2.115208] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.5.0-rc1-next-20160201-dirty #232 [ 2.123315] Hardware name: Freescale i.MX6 SoloLite (Device Tree) [ 2.129429] task: ef060000 ti: ef04a000 task.ti: ef04a000 [ 2.134868] PC is at regcache_rbtree_lookup+0x14/0x110 [ 2.140032] LR is at regcache_rbtree_read+0x1c/0xd0 [ 2.144932] pc : [<c03edce0>] lr : [<c03ee09c>] psr: 60000093 [ 2.144932] sp : ef04bb2c ip : ef04bb58 fp : ef04bb54 [ 2.156428] r10: ef04bd30 r9 : 00000001 r8 : 00000000 [ 2.161670] r7 : ef04bbdc r6 : 00000000 r5 : eead5e00 r4 : eead5e00 [ 2.168213] r3 : c03ee080 r2 : eead5e00 r1 : 00000010 r0 : eead5e00 [ 2.174760] Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment none [ 2.182001] Control: 10c5387d Table: 8000404a DAC: 00000051 [ 2.187764] Process swapper/0 (pid: 1, stack limit = 0xef04a210) [ 2.193788] Stack: (0xef04bb2c to 0xef04c000) [ 2.198171] bb20: eead5e00 eead5e00 00000010 ef04bbdc 00000000 [ 2.206376] bb40: 00000001 ef04bd30 ef04bb74 ef04bb58 c03ee09c c03edcd8 eead5e00 00000010 [ 2.214580] bb60: ef04bbdc ef04bbdc ef04bb94 ef04bb78 c03ed150 c03ee08c 00000000 eead5e00 [ 2.222783] bb80: 00000010 eead5e00 ef04bbb4 ef04bb98 c03eae78 c03ed108 eead5e00 00000010 [ 2.230985] bba0: ef04bbdc 00000010 ef04bbd4 ef04bbb8 c03eaef0 c03eadf8 00000000 00000004 [ 2.239188] bbc0: 00000004 eead5e00 ef04bc0c ef04bbd8 c03ed614 c03eaeb8 ef0bd380 eead5c18 [ 2.247391] bbe0: ef04bc0c eead5e00 c0820498 ef04bd30 ef0ddc10 00000000 ef0bd380 eead5c18 [ 2.255594] bc00: ef04bc4c ef04bc10 c03ea978 c03ed2ec c03e9d28 ef0ddc10 eead2540 c0820498 [ 2.263796] bc20: ef0bd380 ef04bd30 eead25d0 ef0ddc10 eead2540 c0820498 ef0bd380 eead5c18 [ 2.271999] bc40: ef04bc7c ef04bc50 c03eabc8 c03e9fe4 c13891f4 c0a36258 ef04bd30 ef04bd30 [ 2.280201] bc60: ef0ddc10 ef0ddc10 ef7dc188 f0a80000 ef04bc9c ef04bc80 c03f0f84 c03eab70 [ 2.288404] bc80: c13891f4 c0a36258 eead5c10 ef0ddc00 ef04bdd4 ef04bca0 c05be9fc c03f0f48 [ 2.296607] bca0: c13891f4 c0a36258 ef04bcdc ef04bcb8 ef7dc188 00000000 00000000 00000000 [ 2.304809] bcc0: 00000000 fffffffe 00000000 ef04bd58 c0b69e94 ef0ddc10 000000df 00000000 [ 2.313011] bce0: ef04bd4c ef04bcf0 c056fba0 c056f8bc 00000000 ef04bcf8 ef7dc188 00000000 [ 2.321214] bd00: c0b5f424 00000000 ef04bd3c 00000000 00000000 ef04bd58 c0b69e94 ef0ddc10 [ 2.329415] bd20: 000000df 00000000 ef04bd4c ef04bd38 00000000 00000020 00000004 00000000 [ 2.337618] bd40: 00000020 c05bd708 c05bd598 c05bd5c0 c05bd5e8 00000000 00000000 00000000 [ 2.345819] bd60: 00000000 00000000 00000000 00000058 00000000 00000000 00000000 00000000 [ 2.354021] bd80: 00000000 00000000 00000001 00000000 00000017 00000000 00000000 00000003 [ 2.362223] bda0: 00000000 00000000 c1382240 fffffffe ef0ddc10 fffffdfb c0b69e94 c0b69e94 [ 2.370425] bdc0: 000000df 00000000 ef04bdf4 ef04bdd8 c03d48dc c05be838 ef0ddc10 c1382238 [ 2.378627] bde0: c1382240 00000000 ef04be1c ef04bdf8 c03d30a4 c03d4890 ef0ddc10 c0b69e94 [ 2.386829] be00: ef0ddc44 00000000 c0add850 00000000 ef04be3c ef04be20 c03d31fc c03d2eb8 [ 2.395031] be20: ef0b8a5c 00000000 c0b69e94 c03d3160 ef04be64 ef04be40 c03d1488 c03d316c [ 2.403234] be40: ef02c4a4 ef0b8a50 eeb22b58 c0b69e94 eeb22b80 c0b35a48 ef04be74 ef04be68 [ 2.411437] be60: c03d28b4 c03d1438 ef04be9c ef04be78 c03d25b4 c03d28a0 c0a363b0 ef04be88 [ 2.419640] be80: c0b69e94 c0b0c188 eead23c0 c0aec84c ef04beb4 ef04bea0 c03d3aa0 c03d24d4 [ 2.427842] bea0: c0b0c188 c0b0c188 ef04bec4 ef04beb8 c03d47a0 c03d3a2c ef04bed4 ef04bec8 [ 2.436044] bec0: c0add868 c03d4774 ef04bf54 ef04bed8 c00098dc c0add85c c0071cac c0071ab4 [ 2.444248] bee0: ef04bf0c ef04bef0 c0a91600 c02e5af8 00000000 efffccad c07f3df0 000000df [ 2.452450] bf00: ef04bf54 ef04bf10 c004a8bc c0a915f8 00000006 00000006 00000000 c0a8dba8 [ 2.460652] bf20: c0a0fabc 00000000 ef04bf54 c0aff038 00000006 c0b78000 c0aec84c 00000000 [ 2.468853] bf40: 000000df c0aec858 ef04bf94 ef04bf58 c0a91e84 c0009860 00000006 00000006 [ 2.477055] bf60: 00000000 c0a915ec 537bcf5a 00000000 c07c9c40 00000000 00000000 00000000 [ 2.485258] bf80: 00000000 00000000 ef04bfac ef04bf98 c07c9c50 c0a91d74 00000000 00000000 [ 2.493459] bfa0: 00000000 ef04bfb0 c000ff30 c07c9c4c 00000000 00000000 00000000 00000000 [ 2.501660] bfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 2.509862] bfe0: 00000000 00000000 00000000 00000000 00000013 00000000 b7ffaffb ffbbffff [ 2.518049] Backtrace: [ 2.520553] [<c03edccc>] (regcache_rbtree_lookup) from [<c03ee09c>] (regcache_rbtree_read+0x1c/0xd0) [ 2.529702] r10:ef04bd30 r9:00000001 r8:00000000 r7:ef04bbdc r6:00000010 r5:eead5e00 [ 2.537662] r4:eead5e00 [ 2.540246] [<c03ee080>] (regcache_rbtree_read) from [<c03ed150>] (regcache_read+0x54/0x6c) [ 2.548612] r7:ef04bbdc r6:ef04bbdc r5:00000010 r4:eead5e00 [ 2.554392] [<c03ed0fc>] (regcache_read) from [<c03eae78>] (_regmap_read+0x8c/0xc0) [ 2.562062] r6:eead5e00 r5:00000010 r4:eead5e00 r3:00000000 [ 2.567839] [<c03eadec>] (_regmap_read) from [<c03eaef0>] (regmap_read+0x44/0x64) [ 2.575336] r7:00000010 r6:ef04bbdc r5:00000010 r4:eead5e00 [ 2.581114] [<c03eaeac>] (regmap_read) from [<c03ed614>] (regcache_init+0x334/0x404) [ 2.588871] r6:eead5e00 r5:00000004 r4:00000004 r3:00000000 [ 2.594647] [<c03ed2e0>] (regcache_init) from [<c03ea978>] (__regmap_init+0x9a0/0xb8c) [ 2.602578] r10:eead5c18 r9:ef0bd380 r8:00000000 r7:ef0ddc10 r6:ef04bd30 r5:c0820498 [ 2.610536] r4:eead5e00 [ 2.613118] [<c03e9fd8>] (__regmap_init) from [<c03eabc8>] (__devm_regmap_init+0x64/0xa0) [ 2.621310] r10:eead5c18 r9:ef0bd380 r8:c0820498 r7:eead2540 r6:ef0ddc10 r5:eead25d0 [ 2.629268] r4:ef04bd30 [ 2.631849] [<c03eab64>] (__devm_regmap_init) from [<c03f0f84>] (__devm_regmap_init_mmio_clk+0x48/0x5c) [ 2.641257] r8:f0a80000 r7:ef7dc188 r6:ef0ddc10 r5:ef0ddc10 r4:ef04bd30 [ 2.648108] [<c03f0f3c>] (__devm_regmap_init_mmio_clk) from [<c05be9fc>] (fsl_ssi_probe+0x1d0/0x7c4) [ 2.657255] r5:ef0ddc00 r4:eead5c10 [ 2.660905] [<c05be82c>] (fsl_ssi_probe) from [<c03d48dc>] (platform_drv_probe+0x58/0xb8) [ 2.669096] r10:00000000 r9:000000df r8:c0b69e94 r7:c0b69e94 r6:fffffdfb r5:ef0ddc10 [ 2.677055] r4:fffffffe [ 2.679647] [<c03d4884>] (platform_drv_probe) from [<c03d30a4>] (driver_probe_device+0x1f8/0x2b4) [ 2.688535] r7:00000000 r6:c1382240 r5:c1382238 r4:ef0ddc10 [ 2.694315] [<c03d2eac>] (driver_probe_device) from [<c03d31fc>] (__driver_attach+0x9c/0xa0) [ 2.702767] r10:00000000 r8:c0add850 r7:00000000 r6:ef0ddc44 r5:c0b69e94 r4:ef0ddc10 [ 2.710743] [<c03d3160>] (__driver_attach) from [<c03d1488>] (bus_for_each_dev+0x5c/0x90) [ 2.718935] r6:c03d3160 r5:c0b69e94 r4:00000000 r3:ef0b8a5c [ 2.724712] [<c03d142c>] (bus_for_each_dev) from [<c03d28b4>] (driver_attach+0x20/0x28) [ 2.732730] r6:c0b35a48 r5:eeb22b80 r4:c0b69e94 [ 2.737442] [<c03d2894>] (driver_attach) from [<c03d25b4>] (bus_add_driver+0xec/0x1fc) [ 2.745391] [<c03d24c8>] (bus_add_driver) from [<c03d3aa0>] (driver_register+0x80/0xfc) [ 2.753409] r7:c0aec84c r6:eead23c0 r5:c0b0c188 r4:c0b69e94 [ 2.759186] [<c03d3a20>] (driver_register) from [<c03d47a0>] (__platform_driver_register+0x38/0x4c) [ 2.768246] r5:c0b0c188 r4:c0b0c188 [ 2.771904] [<c03d4768>] (__platform_driver_register) from [<c0add868>] (fsl_ssi_driver_init+0x18/0x20) [ 2.781331] [<c0add850>] (fsl_ssi_driver_init) from [<c00098dc>] (do_one_initcall+0x88/0x1e4) [ 2.789897] [<c0009854>] (do_one_initcall) from [<c0a91e84>] (kernel_init_freeable+0x11c/0x1f0) [ 2.798610] r10:c0aec858 r9:000000df r8:00000000 r7:c0aec84c r6:c0b78000 r5:00000006 [ 2.806569] r4:c0aff038 [ 2.809160] [<c0a91d68>] (kernel_init_freeable) from [<c07c9c50>] (kernel_init+0x10/0xf8) [ 2.817352] r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:c07c9c40 [ 2.825310] r4:00000000 [ 2.827898] [<c07c9c40>] (kernel_init) from [<c000ff30>] (ret_from_fork+0x14/0x24) [ 2.835481] r4:00000000 r3:00000000 [ 2.839124] Code: e92ddff0 e24cb004 e59061ac e1a02000 (e5960004) [ 2.845280] ---[ end trace 333f720f66676368 ]--- [ 2.850119] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b [ 2.850119] [ 2.859308] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
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