Dear Developers,
I'm having hard times with g_audio module on a Atmel SAMA5D3. I always obtain a kernel oops in a memcpy inside f_audio_complete function. Honeslty I cannot understand wht's going wrong, cause that memcpy should work.
I have a simple ssc sound card whih works as expected when used with aplay or any other audio player software, but when i pull the usb cable this is what I obtain:
[ 23.860000] Unable to handle kernel paging request at virtual address 0a080604 [ 23.860000] pgd = c0004000 [ 23.860000] [0a080604] *pgd=00000000 [ 23.860000] Internal error: Oops: 805 [#1] ARM [ 23.860000] Modules linked in: usb_f_uac1 g_audio libcomposite snd_soc_atmel_ssc_dai snd_soc_atmel_pcm_dma [ 23.860000] CPU: 0 PID: 0 Comm: swapper Not tainted 3.19.8+ #81 [ 23.860000] Hardware name: Atmel SAMA5 (Device Tree) [ 23.860000] task: c05327b8 ti: c0528000 task.ti: c0528000 [ 23.860000] PC is at memcpy+0x50/0x330 [ 23.860000] LR is at 0x0 [ 23.860000] pc : [<c01a0430>] lr : [<00000000>] psr: 20090193 [ 23.860000] sp : c0529e5c ip : 00000000 fp : cfb33200 [ 23.860000] r10: 00000001 r9 : 0000bb80 r8 : 00000000 [ 23.860000] r7 : 00000000 r6 : 00000000 r5 : 00000000 r4 : 00000000 [ 23.860000] r3 : 00000000 r2 : 00000020 r1 : cf9f5220 r0 : 0a080604 [ 23.860000] Flags: nzCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment kernel [ 23.860000] Control: 10c53c7d Table: 2fb24059 DAC: 00000015 [ 23.860000] Process swapper (pid: 0, stack limit = 0xc0528230) [ 23.860000] Stack: (0xc0529e5c to 0xc052a000) [ 23.860000] 9e40: cf9f5100 [ 23.860000] 9e60: cfa25868 cf9e7dc0 cfb33080 0a080604 cfb33200 bf0287e0 cfa25858 00000000 [ 23.860000] 9e80: cfa20a10 cfb33200 cfa25858 cfa20a10 cfa20a10 000000c0 00000002 c0284f50 [ 23.860000] 9ea0: c0529ea0 c0529ea0 00000002 00000090 cfa25858 c0286408 0000001c ffffffff [ 23.860000] 9ec0: 7fffffff c054e040 00000000 02000029 cf88cac0 c05544fe c0529ed8 c0529ed8 [ 23.860000] 9ee0: 00000000 cfa23c40 cf802540 00000000 00000000 0000002d cf901dc0 c05544fe [ 23.860000] 9f00: 00000000 c0040b28 c05544fe c0554dc0 cf901dc0 cf802540 00000000 00000000 [ 23.860000] 9f20: cf802200 c051fe18 cfffc480 c0040c18 cf901dc0 c0042e38 0000002d 0000002d [ 23.860000] 9f40: 00000000 c004034c c053aca0 c0040570 c000eec4 60090013 ffffffff c0529f9c [ 23.860000] 9f60: c0554600 c0011b00 00000000 c0536918 00000000 c0017880 c0528000 c05300c4 [ 23.860000] 9f80: c05544fc c05544fc c0554600 c051fe18 cfffc480 00000000 01000000 c0529fb0 [ 23.860000] 9fa0: c000eec0 c000eec4 60090013 ffffffff c0528000 c0039b90 ffffffff c04fac30 [ 23.860000] 9fc0: ffffffff ffffffff c04fa678 00000000 00000000 c051fe18 c05547d4 c0530070 [ 23.860000] 9fe0: c051fe14 c0533860 20004059 410fc051 00000000 20008070 00000000 00000000 [ 23.860000] [<c01a0430>] (memcpy) from [<bf0287e0>] (f_audio_complete+0x11c/0x170 [usb_f_uac1]) [ 23.860000] [<bf0287e0>] (f_audio_complete [usb_f_uac1]) from [<c0284f50>] (request_complete+0x5c/0x80) [ 23.860000] [<c0284f50>] (request_complete) from [<c0286408>] (usba_udc_irq+0x12c/0xc50) [ 23.860000] [<c0286408>] (usba_udc_irq) from [<c0040b28>] (handle_irq_event_percpu+0x78/0x140) [ 23.860000] [<c0040b28>] (handle_irq_event_percpu) from [<c0040c18>] (handle_irq_event+0x28/0x38) [ 23.860000] [<c0040c18>] (handle_irq_event) from [<c0042e38>] (handle_fasteoi_irq+0x9c/0x164) [ 23.860000] [<c0042e38>] (handle_fasteoi_irq) from [<c004034c>] (generic_handle_irq+0x2c/0x3c) [ 23.860000] [<c004034c>] (generic_handle_irq) from [<c0040570>] (__handle_domain_irq+0x54/0xa8) [ 23.860000] [<c0040570>] (__handle_domain_irq) from [<c0011b00>] (__irq_svc+0x40/0x54) [ 23.860000] [<c0011b00>] (__irq_svc) from [<c000eec4>] (arch_cpu_idle+0x38/0x3c) [ 23.860000] [<c000eec4>] (arch_cpu_idle) from [<c0039b90>] (cpu_startup_entry+0xa8/0xf4) [ 23.860000] [<c0039b90>] (cpu_startup_entry) from [<c04fac30>] (start_kernel+0x374/0x380) [ 23.860000] Code: f5d1f05c f5d1f07c e8b151f8 e2522020 (e8a051f8) [ 23.860000] ---[ end trace 6affc0dac289a4ab ]--- [ 23.860000] Kernel panic - not syncing: Fatal exception in interrupt [ 23.860000] ---[ end Kernel panic - not syncing: Fatal exception in interrupt
Anyone has a clue about that?