Hi, On beagle-xm, v3.13-rc3, I see the following crash if I use the pinctrl debugfs: # cat /debug/pinctrl/48002030.pinmux/pins [ 16.464233] Unhandled fault: external abort on non-linefetch (0x1028) at 0xfa002268 [ 16.472351] Internal error: : 1028 [#1] SMP ARM [ 16.477142] Modules linked in: [ 16.480377] CPU: 0 PID: 878 Comm: cat Not tainted 3.13.0-rc3-00001-g851bf0abf7d6 #80 [ 16.488555] task: dd2ba080 ti: dd1b6000 task.ti: dd1b6000 [ 16.494262] PC is at pcs_readw+0xc/0x20 [ 16.498321] LR is at pcs_pin_dbg_show+0x34/0x54 [ 16.503112] pc : [<c0321e64>] lr : [<c0322dc8>] psr: a0000013 [ 16.503112] sp : dd1b7e98 ip : dd1b7ea8 fp : dd1b7ea4 [ 16.515197] r10: c075b67c r9 : 0000011c r8 : c05dabf4 [ 16.520721] r7 : dd34dd8c r6 : dd34dd80 r5 : 0000011c r4 : dd3c28c0 [ 16.527618] r3 : c0321e58 r2 : fa002030 r1 : dd3c28c0 r0 : fa002268 [ 16.534515] Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [ 16.542022] Control: 10c5387d Table: 9d52c019 DAC: 00000015 [ 16.548095] Process cat (pid: 878, stack limit = 0xdd1b6248) [ 16.554077] Stack: (0xdd1b7e98 to 0xdd1b8000) [ 16.558654] 7e80: dd1b7ebc dd1b7ea8 [ 16.567291] 7ea0: c0322dc8 c0321e64 0000011d dd3c28c0 dd1b7ef4 dd1b7ec0 c031d860 c0322da0 [ 16.575927] 7ec0: 00020000 dd34ddb8 dd1b6000 dd1b7f08 00000001 becaabd0 00000001 dd09e140 [ 16.584564] 7ee0: 00000000 dd3c28c0 dd1b7f44 dd1b7ef8 c0144c98 c031d7b8 dd3c28f0 becaabd0 [ 16.593200] 7f00: 00001000 dd1b7f78 00000000 00000000 dd55b000 dd09e140 dd55b000 dd09e140 [ 16.601837] 7f20: 00001000 becaabd0 dd1b7f78 00000000 dd1b6000 00001000 dd1b7f74 dd1b7f48 [ 16.610443] 7f40: c0122484 c0144adc 00000001 00000000 00000000 00000000 dd09e140 becaabd0 [ 16.619079] 7f60: 00000000 00001000 dd1b7fa4 dd1b7f78 c01226a0 c01223f8 00000000 00000000 [ 16.627716] 7f80: 000aea08 00000003 becaabd0 00000003 c000f6e4 00000000 00000000 dd1b7fa8 [ 16.636352] 7fa0: c000f520 c0122668 000aea08 00000003 00000003 becaabd0 00001000 00000000 [ 16.644989] 7fc0: 000aea08 00000003 becaabd0 00000003 00000001 00000001 00000000 00000003 [ 16.653625] 7fe0: 00000000 becaabac 00010318 b6ec0ebc 60000010 00000003 fefffded aa599656 [ 16.662231] Backtrace: [ 16.664855] [<c0321e58>] (pcs_readw+0x0/0x20) from [<c0322dc8>] (pcs_pin_dbg_show+0x34/0x54) [ 16.673767] [<c0322d94>] (pcs_pin_dbg_show+0x0/0x54) from [<c031d860>] (pinctrl_pins_show+0xb4/0x f4) [ 16.683380] r5:dd3c28c0 r4:0000011d [ 16.687194] [<c031d7ac>] (pinctrl_pins_show+0x0/0xf4) from [<c0144c98>] (seq_read+0x1c8/0x4a0) [ 16.696289] [<c0144ad0>] (seq_read+0x0/0x4a0) from [<c0122484>] (vfs_read+0x98/0x138) [ 16.704559] [<c01223ec>] (vfs_read+0x0/0x138) from [<c01226a0>] (SyS_read+0x44/0x78) [ 16.712738] [<c012265c>] (SyS_read+0x0/0x78) from [<c000f520>] (ret_fast_syscall+0x0/0x48) [ 16.721466] Code: e89da800 e1a0c00d e92dd800 e24cb004 (e1d020b0) [ 16.727905] ---[ end trace 81665b2138543736 ]--- [ 16.732788] BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:20 [ 16.741607] in_atomic(): 0, irqs_disabled(): 128, pid: 878, name: cat [ 16.748382] INFO: lockdep is turned off. [ 16.752532] irq event stamp: 3448 [ 16.756011] hardirqs last enabled at (3447): [<c05897bc>] mutex_lock_nested+0x2e4/0x3c4 [ 16.764587] hardirqs last disabled at (3448): [<c058b9d4>] __dabt_svc+0x34/0x80 [ 16.772308] softirqs last enabled at (2974): [<c0048644>] __do_softirq+0x1b4/0x314 [ 16.780395] softirqs last disabled at (2961): [<c0048b90>] irq_exit+0xb0/0x108 [ 16.788024] CPU: 0 PID: 878 Comm: cat Tainted: G D 3.13.0-rc3-00001-g851bf0abf7d6 #80 [ 16.797180] Backtrace: [ 16.799804] [<c0013350>] (dump_backtrace+0x0/0x10c) from [<c00134ec>] (show_stack+0x18/0x1c) [ 16.808685] r6:0000000b r5:c08ef480 r4:00000000 r3:00000000 [ 16.814697] [<c00134d4>] (show_stack+0x0/0x1c) from [<c0584660>] (dump_stack+0x8c/0xc0) [ 16.823181] [<c05845d4>] (dump_stack+0x0/0xc0) from [<c006f208>] (__might_sleep+0xe4/0x11c) [ 16.831970] r4:dd1b6000 r3:dd2ba080 [ 16.835784] [<c006f124>] (__might_sleep+0x0/0x11c) from [<c0589e94>] (down_read+0x28/0x60) [ 16.844512] r5:c00b6020 r4:dd376694 [ 16.848297] [<c0589e6c>] (down_read+0x0/0x60) from [<c00b6020>] (acct_collect+0x44/0x198) [ 16.856933] r5:dd1b6000 r4:dd470140 [ 16.860717] [<c00b5fdc>] (acct_collect+0x0/0x198) from [<c0045b54>] (do_exit+0x144/0x968) [ 16.869354] r7:c08474fc r6:dd2ba080 r5:dd1b6000 r4:0000000b [ 16.875366] [<c0045a10>] (do_exit+0x0/0x968) from [<c00138f0>] (die+0x400/0x458) [ 16.883178] r7:c08474fc [ 16.885864] [<c00134f0>] (die+0x0/0x458) from [<c001396c>] (arm_notify_die+0x24/0x5c) [ 16.894134] [<c0013948>] (arm_notify_die+0x0/0x5c) from [<c0008460>] (do_DataAbort+0x90/0xa0) [ 16.903137] [<c00083d0>] (do_DataAbort+0x0/0xa0) from [<c058b9e4>] (__dabt_svc+0x44/0x80) [ 16.911743] Exception stack(0xdd1b7e50 to 0xdd1b7e98) [ 16.917083] 7e40: fa002268 dd3c28c0 fa002030 c0321e58 [ 16.925720] 7e60: dd3c28c0 0000011c dd34dd80 dd34dd8c c05dabf4 0000011c c075b67c dd1b7ea4 [ 16.934356] 7e80: dd1b7ea8 dd1b7e98 c0322dc8 c0321e64 a0000013 ffffffff [ 16.941314] r8:c05dabf4 r7:dd1b7e84 r6:ffffffff r5:a0000013 r4:c0321e64 [ 16.948455] [<c0321e58>] (pcs_readw+0x0/0x20) from [<c0322dc8>] (pcs_pin_dbg_show+0x34/0x54) [ 16.957366] [<c0322d94>] (pcs_pin_dbg_show+0x0/0x54) from [<c031d860>] (pinctrl_pins_show+0xb4/0x f4) [ 16.967010] r5:dd3c28c0 r4:0000011d [ 16.970794] [<c031d7ac>] (pinctrl_pins_show+0x0/0xf4) from [<c0144c98>] (seq_read+0x1c8/0x4a0) [ 16.979888] [<c0144ad0>] (seq_read+0x0/0x4a0) from [<c0122484>] (vfs_read+0x98/0x138) [ 16.988159] [<c01223ec>] (vfs_read+0x0/0x138) from [<c01226a0>] (SyS_read+0x44/0x78) [ 16.996337] [<c012265c>] (SyS_read+0x0/0x78) from [<c000f520>] (ret_fast_syscall+0x0/0x48) [ 17.005096] In-band Error seen by MPU at address 0 [ 17.010223] ------------[ cut here ]------------ [ 17.015106] WARNING: CPU: 0 PID: 878 at drivers/bus/omap_l3_smx.c:162 omap3_l3_app_irq+0xd4/0x12c () [ 17.024658] Modules linked in: [ 17.027893] CPU: 0 PID: 878 Comm: cat Tainted: G D 3.13.0-rc3-00001-g851bf0abf7d6 #80 [ 17.037048] Backtrace: [ 17.039672] [<c0013350>] (dump_backtrace+0x0/0x10c) from [<c00134ec>] (show_stack+0x18/0x1c) [ 17.048553] r6:c031a794 r5:00000009 r4:00000000 r3:00000000 [ 17.054595] [<c00134d4>] (show_stack+0x0/0x1c) from [<c0584660>] (dump_stack+0x8c/0xc0) [ 17.063049] [<c05845d4>] (dump_stack+0x0/0xc0) from [<c0043b3c>] (warn_slowpath_common+0x74/0x98) [ 17.072387] r4:00000000 r3:dd2ba080 [ 17.076202] [<c0043ac8>] (warn_slowpath_common+0x0/0x98) from [<c0043b84>] (warn_slowpath_null+0x 24/0x2c) [ 17.086303] r8:00000000 r7:f8001400 r6:00000000 r5:00000000 r4:04001a00 [ 17.093414] [<c0043b60>] (warn_slowpath_null+0x0/0x2c) from [<c031a794>] (omap3_l3_app_irq+0xd4/0 x12c) [ 17.103240] [<c031a6c0>] (omap3_l3_app_irq+0x0/0x12c) from [<c0093580>] (handle_irq_event_percpu+ 0x60/0x28c) [ 17.113616] r7:00000000 r6:0000001a r5:dd005594 r4:dd0cd580 [ 17.119628] [<c0093520>] (handle_irq_event_percpu+0x0/0x28c) from [<c00937f0>] (handle_irq_event+ 0x44/0x64) [ 17.129913] [<c00937ac>] (handle_irq_event+0x0/0x64) from [<c00964b8>] (handle_level_irq+0xb4/0x1 14) [ 17.139556] r6:dd1b6000 r5:dd005594 r4:dd005540 r3:00020000 [ 17.145568] [<c0096404>] (handle_level_irq+0x0/0x114) from [<c0092ee4>] (generic_handle_irq+0x28/ 0x38) [ 17.155364] r5:c0837278 r4:0000001a [ 17.159179] [<c0092ebc>] (generic_handle_irq+0x0/0x38) from [<c000fe4c>] (handle_IRQ+0x54/0xb8) [ 17.168365] r4:c08437f0 r3:00000174 [ 17.172149] [<c000fdf8>] (handle_IRQ+0x0/0xb8) from [<c00085f4>] (omap3_intc_handle_irq+0x68/0x7c ) [ 17.181610] r8:dd1b6000 r7:0000001a r6:c08ec290 r5:dd1b7c50 r4:fa200000 r3:00000060 [ 17.189941] [<c000858c>] (omap3_intc_handle_irq+0x0/0x7c) from [<c058ba64>] (__irq_svc+0x44/0x5c) [ 17.199279] Exception stack(0xdd1b7c50 to 0xdd1b7c98) [ 17.204620] 7c40: c058b384 dd2ba080 dd1b7c98 00000000 [ 17.213256] 7c60: dd5297c4 dd1b6000 0000000b 0000088c dd1b6000 c08eb904 dd1b6000 dd1b7cac [ 17.221893] 7c80: dd1b7c88 dd1b7c98 c008a108 c058b38c 60000113 ffffffff [ 17.228851] r7:dd1b7c84 r6:ffffffff r5:60000113 r4:c058b38c [ 17.234893] [<c058b358>] (_raw_spin_unlock_irq+0x0/0x4c) from [<c00b6154>] (acct_collect+0x178/0x 198) [ 17.244598] r4:dd470140 r3:dd2ba080 [ 17.248413] [<c00b5fdc>] (acct_collect+0x0/0x198) from [<c0045b54>] (do_exit+0x144/0x968) [ 17.257019] r7:c08474fc r6:dd2ba080 r5:dd1b6000 r4:0000000b [ 17.263061] [<c0045a10>] (do_exit+0x0/0x968) from [<c00138f0>] (die+0x400/0x458) [ 17.270843] r7:c08474fc [ 17.273529] [<c00134f0>] (die+0x0/0x458) from [<c001396c>] (arm_notify_die+0x24/0x5c) [ 17.281799] [<c0013948>] (arm_notify_die+0x0/0x5c) from [<c0008460>] (do_DataAbort+0x90/0xa0) [ 17.290802] [<c00083d0>] (do_DataAbort+0x0/0xa0) from [<c058b9e4>] (__dabt_svc+0x44/0x80) [ 17.299438] Exception stack(0xdd1b7e50 to 0xdd1b7e98) [ 17.304748] 7e40: fa002268 dd3c28c0 fa002030 c0321e58 [ 17.313385] 7e60: dd3c28c0 0000011c dd34dd80 dd34dd8c c05dabf4 0000011c c075b67c dd1b7ea4 [ 17.322021] 7e80: dd1b7ea8 dd1b7e98 c0322dc8 c0321e64 a0000013 ffffffff [ 17.329010] r8:c05dabf4 r7:dd1b7e84 r6:ffffffff r5:a0000013 r4:c0321e64 [ 17.336120] [<c0321e58>] (pcs_readw+0x0/0x20) from [<c0322dc8>] (pcs_pin_dbg_show+0x34/0x54) [ 17.345031] [<c0322d94>] (pcs_pin_dbg_show+0x0/0x54) from [<c031d860>] (pinctrl_pins_show+0xb4/0x f4) [ 17.354675] r5:dd3c28c0 r4:0000011d [ 17.358459] [<c031d7ac>] (pinctrl_pins_show+0x0/0xf4) from [<c0144c98>] (seq_read+0x1c8/0x4a0) [ 17.367553] [<c0144ad0>] (seq_read+0x0/0x4a0) from [<c0122484>] (vfs_read+0x98/0x138) [ 17.375823] [<c01223ec>] (vfs_read+0x0/0x138) from [<c01226a0>] (SyS_read+0x44/0x78) [ 17.384002] [<c012265c>] (SyS_read+0x0/0x78) from [<c000f520>] (ret_fast_syscall+0x0/0x48) [ 17.392730] ---[ end trace 81665b2138543737 ]---
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