Rajendra, > -----Original Message----- > From: Nayak, Rajendra > Sent: Wednesday, March 11, 2009 9:25 PM > To: Menon, Nishanth; linux-omap@xxxxxxxxxxxxxxx > Cc: ext Paul Walmsley; Gupta, Ramesh > Subject: RE: DSPBRIDGE+BRIDGE_DVFS: Crashes on multiple reload > > Does the bridge driver call a clk_notifier_unregister on the > exit path? Yes, it is called. > > > CPU: 0 Not tainted (2.6.28-omap1-00211-gcb75442 #1) > > PC is at clk_notifier_register+0x68/0x108 LR is at > > kmem_cache_alloc+0x7c/0x84 > > Taking an objdump of clock.o shows me it probably is crashing > some place while trying to traverse through the existing list > of registered notifiers. It could very well be that one of > these is an old function pointer registered by the previous > insmod of the bridge driver. > > > -----Original Message----- > > From: Menon, Nishanth > > Sent: Wednesday, March 11, 2009 8:21 PM > > To: linux-omap@xxxxxxxxxxxxxxx > > Cc: ext Paul Walmsley; Nayak, Rajendra; Gupta, Ramesh > > Subject: DSPBRIDGE+BRIDGE_DVFS: Crashes on multiple reload > > > > Hi Folks, > > > > With the latest linux-omap pm + gitorious bridge changes on > SDP3430, > > enabling BRIDGE_DVFS and SRF seems to cause an issue with clock > > notifier.. I am not entirely of the cause of the issue(don't have a > > debugger handy at the moment :( ): The condition is reproducible on > > exactly the third insmod of the driver as explained below. > Looking for > > any advice to fix this issue :( > > > > > > Codebase: > > git clone > > git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-oma > > p-2.6.git > > git checkout -b pm --track origin/pm > > git fetch git://gitorious.org/lk/mainline.git > > tidspbridge-pm:tidspbridge-pm > > git checkout tidspbridge-pm > > git merge pm > > > > defconfig: > > essentially omap_3430sdp_defconfig, enable SRF and > > bridge+bridge_dvfs. (diff b/w defconfig and .config attached). > > > > Bootargs: > > console=ttyS0,115200n8 noinitrd ip=dhcp root=/dev/nfs rw > > nfsroot=<myIP>:<myFS>,nolock,wsize=1024,rsize=1024 mem=64M > > > > The error: > > insmod ./bridgedriver.ko phys_mempool_base=0x87000000 > > phys_mempool_size=0x600000 rmmod bridgedriver insmod > > ./bridgedriver.ko phys_mempool_base=0x87000000 > > phys_mempool_size=0x600000 rmmod bridgedriver insmod > > ./bridgedriver.ko phys_mempool_base=0x87000000 > > phys_mempool_size=0x600000 > > > > Unable to handle kernel paging request at virtual address > 756e696c pgd > > = c3e0c000 *pgd=00000000[756e696c] > > > > Internal error: Oops: 5 [#1] > > Modules linked in:Modules linked in: bridgedriver(+) > > bridgedriver(+) [last unloaded: bridgedriver] [last unloaded: > > bridgedriver] > > > > CPU: 0 Not tainted (2.6.28-omap1-00211-gcb75442 #1) > > PC is at clk_notifier_register+0x68/0x108 LR is at > > kmem_cache_alloc+0x7c/0x84 > > pc : [<c003f684>] lr : [<c009f574>] psr: 00000093 > > sp : c3e05da0 ip : c3e0b3e0 fp : c3e05dbc <snip> > > > > Backtrace: Backtrace: > > > > [<c003f61c>] [<c003f61c>] (clk_notifier_register+0x0/0x108) > > (clk_notifier_register+0x0/0x108) from [<bf08d394>] from > [<bf08d394>] > > (bridge_init+0x394/0x3ec [bridgedriver]) (bridge_init+0x394/0x3ec > > [bridgedriver]) r7:00000000 r7:00000000 r6:bf08ab88 r6:bf08ab88 > > r5:1dcd6500 r5:1dcd6500 r4:0ee6b280 r4:0ee6b280 > > > > [<bf08d000>] [<bf08d000>] (bridge_init+0x0/0x3ec > > [bridgedriver]) (bridge_init+0x0/0x3ec [bridgedriver]) from > > [<c002d2d4>] from [<c002d2d4>] (do_one_initcall+0x64/0x198) > > (do_one_initcall+0x64/0x198) > > r8:c002df28 r8:c002df28 r7:00000000 r7:00000000 r6:4023a000 > > r6:4023a000 r5:bf08a520 r5:bf08a520 r4:c03aa340 r4:c03aa340 > > > > [<c002d270>] [<c002d270>] (do_one_initcall+0x0/0x198) > > (do_one_initcall+0x0/0x198) from [<c0078cac>] from [<c0078cac>] > > (sys_init_module+0x98/0x188) > > (sys_init_module+0x98/0x188) > > [<c0078c14>] [<c0078c14>] (sys_init_module+0x0/0x188) > > (sys_init_module+0x0/0x188) from [<c002dd80>] from [<c002dd80>] > > (ret_fast_syscall+0x0/0x2c) > > (ret_fast_syscall+0x0/0x2c) > > r7:00000080 r7:00000080 r6:00000000 r6:00000000 r5:0000000b > > r5:0000000b r4:00000000 r4:00000000 > > > > Code: Code: e5943000 e5943000 e1530006 e1530006 0a000005 > > 0a000005 e2424008 e2424008 (e5942008) (e5942008) > > > > <4>---[ end trace c53b9e94a29571d4 ]--- ---[ end trace > > c53b9e94a29571d4 ]--- Segmentation fault > > > > > > Regards, > > Nishanth Menon > > Regards Ramesh Gupta G-- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
