On Mon, 2009-07-20 at 14:42 +0530, Azam Ansari wrote: > Dear All, > > I integrated the PM patch send by you with kernel version 2.6.10. But > when I do > $ echo mem > /sys/power/state > the kernel hangs. > > Below is the kernel dump. > > [email protected]:/sys/power# echo mem > state > Stopping tasks: ==============| > Unable to handle kernel NULL pointer dereference at virtual address > 0000006b > pgd = c5334000 > [0000006b] *pgd=86b8a031, *pte=00000000, *ppte=00000000 > Internal error: Oops: 801 [#1] > Modules linked in: > CPU: 0 > PC is at add_wait_queue+0x44/0x74 > LR is at 0x40000013 > pc : [<c0069898>] lr : [<40000013>] Not tainted > sp : c6babdd8 ip : 00000067 fp : c6babde4 > r10: c6babe00 r9 : 00000000 r8 : c06679a0 > r7 : ffffffff r6 : c0667900 r5 : c6baa000 r4 : c6babdf8 > r3 : c6babe0c r2 : c6baa000 r1 : c6babe00 r0 : c06679a0 > Flags: nZcv IRQs off FIQs on Mode SVC_32 Segment user > Control: 5317F Table: 85334000 DAC: 00000015 > Process bash (pid: 1076, stack limit = 0xc6baa1a0) > Stack: (0xc6babdd8 to 0xc6bac000) > bdc0: c6babe44 > c6babde8 > bde0: c01e6124 c0069864 00000000 c7399820 c004da6c 00000000 00000000 > 0000000c > be00: 00000000 c7399820 c004da6c 00000067 00000000 c0300508 00000000 > c0667900 > be20: 00000003 00000000 c02f0590 c02ff474 00000003 c02ff494 c6babe5c > c6babe48 > be40: c01e7270 c01e60c4 00baa000 c02f0590 c6babe6c c6babe60 c01ea804 > c01e7264 > be60: c6babe84 c6babe70 c0173ff0 c01ea7e0 c02ff464 c02f0620 c6babe94 > c6babe88 > be80: c01751f4 c0173fc8 c6babec4 c6babe98 c01752c0 c01751c8 00000025 > 00000000 > bea0: 00000003 00000003 c035f284 c02f284c c6babf78 c6db96c0 c6babeec > c6babec8 > bec0: c006fa70 c0175210 c0075f10 c6ca8000 c02f283c 00000003 00000003 > 00000004 > bee0: c6babf14 c6babef0 c006fc78 c006f9c0 c6babf78 00000004 000af408 > c717d860 > bf00: 00000000 c717d878 c6babf24 c6babf18 c00c8e2c c006fc08 c6babf54 > c6babf28 > bf20: c00c911c c00c8e10 00000002 00000004 c6db96c0 000af408 c6babf78 > c00362f4 > bf40: c6baa000 00900004 c6babf74 c6babf58 c00929f0 c00c901c 00000000 > 00000000 > bf60: c6db96c0 00000004 c6babfa4 c6babf78 c0092ae4 c0092940 00000000 > 00000000 > bf80: c0091f74 00000000 000576ec 00000004 4017c798 000af408 00000000 > c6babfa8 > bfa0: c0035b60 c0092aac 00000004 4017c798 00000001 000af408 00000004 > 00000000 > bfc0: 00000004 4017c798 000af408 00000004 400178e0 00000000 00000001 > 00000000 > bfe0: 00000000 befff9ac 40115a4c 40115a68 60000010 00000001 00000000 > efffffff > Backtrace: > [<c0069854>] (add_wait_queue+0x0/0x74) from [<c01e6124>] > (__mmc_claim_host+0x70/0x148) > [<c01e60b4>] (__mmc_claim_host+0x0/0x148) from [<c01e7270>] > (mmc_suspend_host+0x1c/0x3c) > [<c01e7254>] (mmc_suspend_host+0x0/0x3c) from [<c01ea804>] > (davinci_mmcsd_suspend+0x34/0x40) > r4 = C02F0590 > [<c01ea7d0>] (davinci_mmcsd_suspend+0x0/0x40) from [<c0173ff0>] > (platform_suspend+0x38/0x8c) > [<c0173fb8>] (platform_suspend+0x0/0x8c) from [<c01751f4>] > (suspend_device+0x3c/0x48) > r5 = C02F0620 r4 = C02FF464 > [<c01751b8>] (suspend_device+0x0/0x48) from [<c01752c0>] > (device_suspend+0xc0/0x200) > [<c0175200>] (device_suspend+0x0/0x200) from [<c006fa70>] (enter_state > +0xc0/0x198) > [<c006f9b0>] (enter_state+0x0/0x198) from [<c006fc78>] (state_store > +0x80/0x90) > r8 = 00000004 r7 = 00000003 r6 = 00000003 r5 = C02F283C > r4 = C6CA8000 > [<c006fbf8>] (state_store+0x0/0x90) from [<c00c8e2c>] > (subsys_attr_store+0x2c/0x38) > r8 = C717D878 r7 = 00000000 r6 = C717D860 r5 = 000AF408 > r4 = 00000004 > [<c00c8e00>] (subsys_attr_store+0x0/0x38) from [<c00c911c>] > (sysfs_write_file+0x110/0x15c) > [<c00c900c>] (sysfs_write_file+0x0/0x15c) from [<c00929f0>] (vfs_write > +0xc0/0xf8) > [<c0092930>] (vfs_write+0x0/0xf8) from [<c0092ae4>] (sys_write > +0x48/0x74) > r7 = 00000004 r6 = C6DB96C0 r5 = 00000000 r4 = 00000000 > [<c0092a9c>] (sys_write+0x0/0x74) from [<c0035b60>] (ret_fast_syscall > +0x0/0x2c) > r6 = 000AF408 r5 = 4017C798 r4 = 00000004 > Code: e5823004 e590c000 e281300c e581c00c (e58c3004) > <6>note: bash[1076] exited with preempt_count 1 > BUG: scheduling while atomic: bash/0x40000001/1076 > caller is __cond_resched+0x60/0x80 > BUG: scheduling while atomic: bash/0x40000001/1076 > caller is __cond_resched+0x60/0x80 > BUG: scheduling while atomic: bash/0x40000001/1076 > caller is __cond_resched+0x60/0x80 > BUG: scheduling while atomic: bash/0x40000001/1076 > caller is __cond_resched+0x60/0x80 > BUG: scheduling while atomic: bash/0x40000001/1076 > caller is __cond_resched+0x60/0x80 > BUG: scheduling while atomic: bash/0x00000001/1076 > caller is do_exit+0xd3c/0xda0 > > > Please let me know where should I look for the problem.
I'll probably start by inserting a printk in drivers/mmc/mmc.c __mmc_claim_host() to look at the address of host and &host->wq. Regards, Steve _______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
