Hello,everyone,i use usbserial driver to driver my 3G modem, my board will hang.the message of dmesg is below,have you faced such problem? Thanks for any advice
my kernel is 2.6.10( obtained in REL_LSP_01_30_01_091 ) Unable to handle kernel NULL pointer dereference at virtual address 00000088 pgd = c0004000 [00000088] *pgd=00000000 Internal error: Oops: 17 [#1] Modules linked in: dsplinkk cmemk usbserial musb_hdrc gpio_gd8813 reset_ioext ctrl_i2c davinci_capture at8563 sdio_davinci_hcd sdio_memory_fd sdio_busdriver sdio_lib CPU: 0 PC is at serial_write_room+0x40/0xa0 [usbserial] LR is at opost+0x28/0x1dc pc : [<bf03563c>] lr : [<c0174ae0>] Tainted: PF sp : c046de30 ip : c046de50 fp : c046de4c r10: 00000006 r9 : c2f7e12c r8 : c2f7e12c r7 : 00000006 r6 : bf03bde4 r5 : ffffffea r4 : 00000000 r3 : c2f7e000 r2 : bf0380b4 r1 : bf0387e4 r0 : bf038814 Flags: nZCv IRQs on FIQs on Mode SVC_32 Segment kernel Control: 5317F Table: 8306C000 DAC: 00000017 Process events/0 (pid: 4, stack limit = 0xc046c1a0) Stack: (0xc046de30 to 0xc046e000) de20: c046de5c c2f7e000 0000000a c2f7e000 de40: c046de64 c046de50 c0174ae0 bf03560c c2f7e000 0000000a c046df24 c046de68 de60: c0175848 c0174ac8 c529a860 00000000 c2f7e52d c03299b0 c046dea4 c046de88 de80: c00320e8 c0031b14 c046df14 c046c000 000003e8 00000064 c046deb8 c0040e08 dea0: 000003e8 00000064 c046dec8 c0040e08 c0040f84 c58cd820 c046dee4 c046dec8 dec0: c046dee4 c046ded0 c0040fc4 c53444c0 c032c490 c032c4c4 c046df34 c046dee8 dee0: c027e15c c00415c0 c5219800 c0431f28 c046df1c 00000000 e4301580 c2f7e000 df00: c2f7e52c c2f7e12c 00000000 60000013 c2f7e00c 00000006 c046df54 c046df28 df20: c0174200 c0175320 c046df54 c2f7e0d8 c2f7e0d4 c046c000 00000000 c0431f20 df40: c2f7e000 c0431f28 c046dfc4 c046df58 c0057710 c0174118 c044df2c c0174108 df60: ffffffff ffffffff 00000001 00000000 c0041b88 00010000 00000000 c046c000 df80: 00000000 c042f540 c0041b88 00100100 00200200 00000000 c046dfc4 c0431f20 dfa0: c046c000 c044df20 c005750c fffffffc 00000000 00000000 c046dff4 c046dfc8 dfc0: c005d414 c005751c ffffffff ffffffff 00000000 00000000 00000000 00000000 dfe0: 00000000 00000000 00000000 c046dff8 c004818c c005d344 00000000 00000000 Backtrace: [<bf0355fc>] (serial_write_room+0x0/0xa0 [usbserial]) from [<c0174ae0>] (opost+0x28/0x1dc) r6 = C2F7E000 r5 = 0000000A r4 = C2F7E000 [<c0174ab8>] (opost+0x0/0x1dc) from [<c0175848>] (n_tty_receive_buf+0x538/0xe64) r5 = 0000000A r4 = C2F7E000 [<c0175310>] (n_tty_receive_buf+0x0/0xe64) from [<c0174200>] (flush_to_ldisc+0xf8/0x104) [<c0174108>] (flush_to_ldisc+0x0/0x104) from [<c0057710>] (worker_thread+0x204/0x2c0) [<c005750c>] (worker_thread+0x0/0x2c0) from [<c005d414>] (kthread+0xe0/0x114) [<c005d334>] (kthread+0x0/0x114) from [<c004818c>] (do_exit+0x0/0xda0) r8 = 00000000 r7 = 00000000 r6 = 00000000 r5 = 00000000 r4 = 00000000 Code: e3e05015 0a000001 e5d43008 eb404476 (e5943088)
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