load decoder firmware: ------------[ cut here ]------------
WARNING: at arch/arm/mm/ioremap.c:243 __arm_ioremap_pfn_caller+0x168/0x288()
Modules linked in:
Backtrace:
[<80011108>] (dump_backtrace+0x0/0x10c) from [<803ee4ec>] (dump_stack+0x18/0x1c)
 r6:804bc986 r5:000000f3 r4:00000000 r3:80569cdc
[<803ee4d4>] (dump_stack+0x0/0x1c) from [<8001d538>] (warn_slowpath_common+0x54/0x6c)
[<8001d4e4>] (warn_slowpath_common+0x0/0x6c) from [<8001d574>] (warn_slowpath_null+0x24/0x2c)
 r8:5f800000 r7:8055c6f4 r6:00184000 r5:00183780 r4:0005f800
r3:00000009
[<8001d550>] (warn_slowpath_null+0x0/0x2c) from [<80016a40>] (__arm_ioremap_pfn_caller+0x168/0x288)
[<800168d8>] (__arm_ioremap_pfn_caller+0x0/0x288) from [<80016bdc>] (__arm_ioremap_caller+0x5c/0x64)
[<80016b80>] (__arm_ioremap_caller+0x0/0x64) from [<80016670>] (__arm_ioremap+0x1c/0x24)
 r4:00000000
[<80016654>] (__arm_ioremap+0x0/0x24) from [<802d8e38>] (rto_load_firmware+0xa0/0x24c)
[<802d8d98>] (rto_load_firmware+0x0/0x24c) from [<802d7bd0>] (acm_request_firmware+0x64/0xa4)
[<802d7b6c>] (acm_request_firmware+0x0/0xa4) from [<802d79fc>] (acm_mode_change+0x70/0xb8)
 r5:00000000 r4:98d492c0
[<802d798c>] (acm_mode_change+0x0/0xb8) from [<802d7aec>] (acm_setup_decoder+0x34/0x40)
 r7:809d7805 r6:00000000 r5:98d492dc r4:98d492c0
[<802d7ab8>] (acm_setup_decoder+0x0/0x40) from [<80032740>] (process_one_work+0x1f8/0x370)
 r5:809d7800 r4:9f81b180
[<80032548>] (process_one_work+0x0/0x370) from [<8003372c>] (worker_thread+0x1d4/0x2f8)
[<80033558>] (worker_thread+0x0/0x2f8) from [<80037550>] (kthread+0x94/0xa0)
[<800374bc>] (kthread+0x0/0xa0) from [<80020e80>] (do_exit+0x0/0x75c)
 r6:80020e80 r5:800374bc r4:9f841ef0
---[ end trace bda39b24dfefc00e ]---
acm acm.0: failed to load firmware
                                                                failed