Hi, I´m trying to use a Marvell 88w8686 chip with a DM6446 and the libertas driver. So far it looks promising as the libertas is able to detect the chip, send the firmware to it and configure it. But when I try to set the essid with the iwconfig command:
iwconfig eth1 essid TEST I have a kernel Oops: Begin kernel log ------------------------------------------------------------ mmc0: starting CMD53 arg 12000020 flags 000001b5 mmc0: blksz 32 blocks 1 flags 00000200 tsac 1000 ms nsac 0 davinci_mmc davinci_mmc.0: MMCSD : Data xfer (block read), DTO 0 cycles + 1000000000 ns, 1 blocks of 32 bytes davinci_mmc davinci_mmc.0: CMD53, arg 0x12000020, R1/R5/R6/R7 response mmc0: req done (CMD53): 0: 00002000 00000000 00000000 00000000 mmc0: 32 bytes transferred: 0 davinci_mmc davinci_mmc.0: host->data is NULL Unable to handle kernel NULL pointer dereference at virtual address 00000014 pgd = c0004000 [00000014] *pgd=00000000 Internal error: Oops: 17 [#1] Modules linked in: davinci_mmc libertas_sdio libertas mmc_core dspload dm6446 vlynq fpgadl_ser fpgadl firmware_class davinci_spi_bb spi_bitbang CPU: 0 Not tainted (2.6.28-davinci1-06576-g2e9a3f4-dirty #20) PC is at mmc_davinci_dma_cb +0x68/0xb0 [davinci_mmc] LR is at mmc_davinci_dma_cb+0x60/0xb0 [davinci_mmc] pc : [<bf0744fc>] lr : [<bf0744f4>] psr: a0000013 sp : c393bc18 ip : c393bc18 fp : c393bc2c r10: fec00300 r9 : 00000001 r8 : fec00308 r7 : fec02040 r6 : fec00000 r5 : 00000000 r4 : c3ad7a60 r3 : 00000000 r2 : c3ad7800 r1 : fec02008 r0 : bf075250 Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel Control: 0005317f Table: 83a24000 DAC: 00000017 Process ksdioirqd/mmc0 (pid: 417, stack limit = 0xc393a268) Stack: (0xc393bc18 to 0xc393c000) bc00: c393bc8c 0000001b bc20: c393bc6c c393bc30 c0027b1c bf0744a4 ffffffff 00000000 c3846340 00000000 bc40: c3846340 c3846340 00000000 00000000 00000011 c0267768 00000001 c393a000 bc60: c393bc8c c393bc70 c00528a4 c0027a50 c0251270 00000011 c3846340 c02512a4 bc80: c393bcb4 c393bc90 c0054464 c0052870 c393bcac 00000011 00000000 c3859bd8 bca0: c3818d40 c025ef08 c393bccc c393bcb8 c001e064 c0054380 ffffffff fec48000 bcc0: c393bd24 c393bcd0 c001e9f4 c001e010 c025ef08 00000000 ffffffff 60000013 bce0: 00000000 c3859a80 c3859bd8 c3818d40 c025ef08 00000001 c393a000 c393bd24 bd00: c393bd18 c393bd18 c01c9b0c c01c9b18 60000013 ffffffff c393bd54 c393bd28 bd20: c01c7ab4 c01c9b0c c393bd4c c393be00 00000000 7fffffff 7fffffff c393a000 bd40: 00000000 00000002 c393bd8c c393bd58 c01c7da4 c01c7940 00000001 00000020 bd60: 7fffffff c393bdfc 00010000 c393be00 c393be00 00000000 7fffffff c393bdfc bd80: c393bdd4 c393bd90 c01c7810 c01c7d94 3b9aca00 00000001 c3859a80 c002a3d4 bda0: c393be10 c393be10 00080004 00000001 00000020 c393bea4 c3ad7800 00010000 bdc0: 00000000 00000000 c393bde4 c393bdd8 c01c792c c01c7740 c393be44 c393bde8 bde0: bf02c964 c01c7924 00000200 000003e8 00000000 00000000 c3ad78d4 00000001 be00: 00000001 dead4ead ffffffff ffffffff c393bda0 c393bda0 00000001 dead4ead be20: ffffffff ffffffff c393be4c 00000020 00000001 c3b4ac00 c393beec c393be48 be40: bf030428 bf02c75c 00000001 3b9aca00 00000000 00000020 00000001 00000000 be60: 00000200 00000020 00000000 c393bea4 00000001 c393beb8 00000035 12000020 be80: 00002000 00000000 00000000 00000000 000001b5 00000000 00000000 c393be4c bea0: c393bea4 c393be78 c393be4c 00000000 c393bdfc bf02ca04 c033bc02 00000018 bec0: 83b60018 00000020 00000100 00000020 00000020 c3b02e00 c3b60018 00010000 bee0: c393bf34 c393bef0 bf031508 bf0302c0 00000000 c3b60018 00000001 00000020 bf00: c3b60000 00000000 c393bf58 ffffdd48 c3b60000 c024ff00 c393bf58 0000001d bf20: c393a000 00000000 c393bf4c c393bf38 bf031590 bf0313c0 c3b60018 00000020 bf40: c393bf84 c393bf50 bf06c37c bf03157c 00000000 c393bef4 00000000 00000000 bf60: 00000001 00000000 00000000 c3ad7800 c3b4ac00 00000000 c393bfd4 c393bf88 bf80: bf031d80 bf06c158 00000000 c393bfa7 c3ad7a48 c3b4acd4 c3ad78d4 00000001 bfa0: 00000001 0202bf44 c0029814 c393a000 c3ad7800 bf031c68 00000000 00000000 bfc0: 00000000 00000000 c393bff4 c393bfd8 c004339c bf031c78 00000000 00000000 bfe0: 00000000 00000000 00000000 c393bff8 c003263c c0043350 426d0108 08003331 Backtrace: [<bf074494>] (mmc_davinci_dma_cb+0x0/0xb0 [davinci_mmc]) from [<c0027b1c>] (dma_ccerr_handler+0xdc/0x1c0) r4:0000001b [<c0027a40>] (dma_ccerr_handler+0x0/0x1c0) from [<c00528a4>] (handle_IRQ_event+0x44/0x84) [<c0052860>] (handle_IRQ_event+0x0/0x84) from [<c0054464>] (handle_edge_irq+0xf4/0x17c) r7:c02512a4 r6:c3846340 r5:00000011 r4:c0251270 [<c0054370>] (handle_edge_irq+0x0/0x17c) from [<c001e064>] (__exception_text_start+0x64/0x84) r8:c025ef08 r7:c3818d40 r6:c3859bd8 r5:00000000 r4:00000011 [<c001e000>] (__exception_text_start +0x0/0x84) from [<c001e9f4>] (__irq_svc+0x34/0x60) Exception stack (0xc393bcd0 to 0xc393bd18) bcc0: c025ef08 00000000 ffffffff 60000013 bce0: 00000000 c3859a80 c3859bd8 c3818d40 c025ef08 00000001 c393a000 c393bd24 bd00: c393bd18 c393bd18 c01c9b0c c01c9b18 60000013 ffffffff r5:fec48000 r4:ffffffff [<c01c9afc>] (_spin_unlock_irq+0x0/0x20) from [<c01c7ab4>] (schedule +0x184/0x288) [<c01c7930>] (schedule+0x0/0x288) from [<c01c7da4>] (schedule_timeout+0x20/0xc4) [<c01c7d84>] (schedule_timeout+0x0/0xc4) from [<c01c7810>] (wait_for_common+0xe0/0x16c) r7:c393bdfc r6:7fffffff r5:00000000 r4:c393be00 [<c01c7730>] (wait_for_common+0x0/0x16c) from [<c01c792c>] (wait_for_completion+0x18/0x1c) [<c01c7914>] (wait_for_completion+0x0/0x1c) from [<bf02c964>] (mmc_wait_for_req +0x218/0x23c [mmc_core]) [<bf02c74c>] (mmc_wait_for_req+0x0/0x23c [mmc_core]) from [<bf030428>] (mmc_io_rw_extended+0x178/0x1d8 [mmc_core]) r7:c3b4ac00 r6:00000001 r5:00000020 r4:c393be4c [<bf0302b0>] (mmc_io_rw_extended+0x0/0x1d8 [mmc_core]) from [<bf031508>] (sdio_io_rw_ext_helper+0x158/0x190 [mmc_core]) [<bf0313b0>] (sdio_io_rw_ext_helper+0x0/0x190 [mmc_core]) from [<bf031590>] (sdio_readsb+0x24/0x2c [mmc_core]) [<bf03156c>] (sdio_readsb+0x0/0x2c [mmc_core]) from [<bf06c37c>] (if_sdio_interrupt +0x234/0x920 [libertas_sdio]) [<bf06c148>] (if_sdio_interrupt+0x0/0x920 [libertas_sdio]) from [<bf031d80>] (sdio_irq_thread+0x118/0x254 [mmc_core]) [<bf031c68>] (sdio_irq_thread+0x0/0x254 [mmc_core]) from [<c004339c>] (kthread+0x5c/0x94) [<c0043340>] (kthread+0x0/0x94) from [<c003263c>] (do_exit+0x0/0x6e0) r6:00000000 r5:00000000 r4:00000000 Code: e5930000 eb42f951 e5943004 e5942008 (e5933014) Kernel panic - not syncing: Fatal exception in interrupt ------------------------------------------------------------ End kernel log The crash is caused by the host->data member being NULL in the function mmc_davinci_dma_cb() (drivers/mmc/host/mmc_davinci.c). The message you see just before the crash: davinci_mmc davinci_mmc.0: host->data is NULL is a trace I added in the function mmc_davinci_dma_cb() to confirm the cause of the bug. What would be the proper way to deal with that bug/condition? Thank-you, Hugo V. --------------- Hugo Villeneuve www.hugovil.com --------------- _______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
