Question
Kernel crash when sdmmc1 / sdmmc2 nodes are disabled in DT
We are using the STM32MP15-ecosystem-v2.0.0 on an EV1 board.
We need to disable the sdmmc1 / sdmmc2 nodes in the DT, so we are adding the following at the end stm32mp157c-ev1.dts:
&sdmmc1 {
status = "disabled";
};
&sdmmc2 {
status = "disabled";
};However this results in a kernel crash, apparently related to the NAND code.
I am attaching (part of) the kernel traces here:
[ 3.906739] ubi0: attaching mtd3
[ 6.876347] ubi0: scanning is finished
[ 6.893628] ubi0: attached mtd3 (name "UBI", size 1018 MiB)
[ 6.897839] ubi0: PEB size: 262144 bytes (256 KiB), LEB size: 253952 bytes
[ 6.904740] ubi0: min./max. I/O unit sizes: 4096/4096, sub-page size 4096
[ 6.911450] ubi0: VID header offset: 4096 (aligned 4096), data offset: 8192
[ 6.918459] ubi0: good PEBs: 4068, bad PEBs: 4, corrupted PEBs: 0
[ 6.924558] ubi0: user volume: 6, internal volumes: 1, max. volumes count: 128
[ 6.931778] ubi0: max/mean erase counter: 2/0, WL threshold: 4096, image sequence number: 404136786
[ 6.940914] ubi0: available PEBs: 0, total reserved PEBs: 4068, PEBs reserved for bad PEB handling: 76
[ 6.950260] ubi0: background thread "ubi_bgt0d" started, PID 148
[ 6.977970] input: joystick as /devices/platform/joystick/input/input1
[ 6.983812] stm32_rtc 5c004000.rtc: setting system clock to 2000-01-01T00:00:27 UTC (946684827)
[ 6.992464] 8<--- cut here ---
[ 6.994829] Unable to handle kernel NULL pointer dereference at virtual address 00000020
[ 7.002944] pgd = e429131c
[ 7.005643] [00000020] *pgd=00000000
[ 7.009227] Internal error: Oops: 5 [#1] PREEMPT SMP ARM
[ 7.014541] Modules linked in:
[ 7.017599] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.4.31 #1
[ 7.023523] Hardware name: STM32 (Device Tree Support)
[ 7.028684] PC is at mp1_mgate_clk_disable_safe+0x38/0x8c
[ 7.034084] LR is at mp1_mgate_clk_disable_safe+0x10/0x8c
[ 7.039489] pc : [<c05b501c>] lr : [<c05b4ff4>] psr: 60000093
[ 7.045769] sp : e6897eb0 ip : 00000000 fp : 00000008
[ 7.051003] r10: 0000012a r9 : c10004a4 r8 : c105c858
[ 7.056239] r7 : 00000000 r6 : 00000000 r5 : e6e5f0c0 r4 : e6e5d840
[ 7.062782] r3 : 00000000 r2 : c1200bcc r1 : 00000001 r0 : e6e5d840
[ 7.069326] Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment none
[ 7.076565] Control: 10c5387d Table: c000406a DAC: 00000051
[ 7.082322] Process swapper/0 (pid: 1, stack limit = 0x3e9a590e)
[ 7.088342] Stack: (0xe6897eb0 to 0xe6898000)
[ 7.092708] 7ea0: 60000013 e6e5f0c0 c11b2d04 00000000
[ 7.100912] 7ec0: c105c858 c05acc30 e6e5f0c0 e6e29780 ffffe000 00000000 c105c858 c05acb78
[ 7.109112] 7ee0: e6e29780 c11ffa10 ffffe000 00000000 c105c858 c05aeca8 c11b05e0 c05aec70
[ 7.117313] 7f00: ffffe000 c0102fa8 00000001 c01685e8 c0f51fc8 c1000400 c0e4f0b0 00000000
[ 7.125513] 7f20: 00000007 00000007 00000000 c0def3e8 c0de0778 c0de072c c106fab0 e7fffe3a
[ 7.133712] 7f40: e7fffe42 c1104c88 cccccccd 00000007 c11d90c0 c1104c88 c105c834 c1070650
[ 7.141911] 7f60: c11d90c0 c11d90c0 c105c838 c1001110 00000007 00000007 00000000 c10004a4
[ 7.150111] 7f80: c0b217e8 00000000 c0b217e8 00000000 00000000 00000000 00000000 00000000
[ 7.158311] 7fa0: 00000000 c0b217f0 00000000 c01010e8 00000000 00000000 00000000 00000000
[ 7.166510] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 7.174710] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
[ 7.182928] [<c05b501c>] (mp1_mgate_clk_disable_safe) from [<c05acc30>] (clk_disable_unused_subtree+0xdc/0x260)
[ 7.193031] [<c05acc30>] (clk_disable_unused_subtree) from [<c05acb78>] (clk_disable_unused_subtree+0x24/0x260)
[ 7.203148] [<c05acb78>] (clk_disable_unused_subtree) from [<c05aeca8>] (clk_disable_unused+0x38/0x128)
[ 7.212572] [<c05aeca8>] (clk_disable_unused) from [<c0102fa8>] (do_one_initcall+0x58/0x2b4)
[ 7.221037] [<c0102fa8>] (do_one_initcall) from [<c1001110>] (kernel_init_freeable+0x1c8/0x264)
[ 7.229759] [<c1001110>] (kernel_init_freeable) from [<c0b217f0>] (kernel_init+0x8/0x110)
[ 7.237957] [<c0b217f0>] (kernel_init) from [<c01010e8>] (ret_from_fork+0x14/0x2c)
[ 7.245535] Exception stack(0xe6897fb0 to 0xe6897ff8)
[ 7.250598] 7fa0: 00000000 00000000 00000000 00000000
[ 7.258801] 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 7.267000] 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 7.273634] Code: e5933004 e3530000 18bd81f0 e590606c (e5963020)
[ 7.279734] ---[ end trace cd435da745db4b28 ]---
[ 7.284362] note: swapper/0[1] exited with preempt_count 1
[ 7.289855] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
[ 7.297556] CPU0: stopping
[ 7.300240] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G D 5.4.31 #1
[ 7.307559] Hardware name: STM32 (Device Tree Support)
[ 7.312726] [<c01124dc>] (unwind_backtrace) from [<c010d784>] (show_stack+0x10/0x14)
[ 7.320486] [<c010d784>] (show_stack) from [<c0b0a234>] (dump_stack+0xb0/0xc4)
[ 7.327727] [<c0b0a234>] (dump_stack) from [<c0110f10>] (handle_IPI+0x41c/0x448)
[ 7.335143] [<c0110f10>] (handle_IPI) from [<c0568558>] (gic_handle_irq+0x8c/0x90)
[ 7.342729] [<c0568558>] (gic_handle_irq) from [<c0101a8c>] (__irq_svc+0x6c/0xa8)
[ 7.350220] Exception stack(0xc1101f40 to 0xc1101f88)
[ 7.355287] 1f40: 00000000 00011ef4 e765d074 c011b740 00000000 c1100000 c1104ca8 c1104ce8
[ 7.363486] 1f60: 00000001 c105ca40 e7fffd80 00000000 ffffffff c1101f90 c010a1a4 c010a1a8
[ 7.371680] 1f80: 60000013 ffffffff
[ 7.375181] [<c0101a8c>] (__irq_svc) from [<c010a1a8>] (arch_cpu_idle+0x38/0x3c)
[ 7.382596] [<c010a1a8>] (arch_cpu_idle) from [<c01582b4>] (do_idle+0xc4/0x14c)
[ 7.389922] [<c01582b4>] (do_idle) from [<c0158628>] (cpu_startup_entry+0x18/0x20)
[ 7.397509] [<c0158628>] (cpu_startup_entry) from [<c1000f10>] (start_kernel+0x4bc/0x4f4)
[ 7.405708] [<c1000f10>] (start_kernel) from [<00000000>] (0x0)
[ 7.411645] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b ]---Is this a known issue?
Any hint on what may be the problem?
Guillermo