Interestingly, by adding: gpio_request(3, "fpga_interrupt"); gpio_direction_input(3); gpio_export(3, true); just before irq_set_irq_type and request_irq, the crash seems to disappear. I have no idea why the above is required. Regards, Ran On Tue, Jan 17, 2017 at 8:34 PM, Ran Shalit <ranshalit@xxxxxxxxx> wrote: > Hello, > > I am doing very simple irq registration and I get crash with omap4460 > as following. > Can anyone please advise how to resolve this ? > > root@localhost:~# dmesg -c > root@localhost:~# [ 180.710235] Can't get irq 163 > > root@localhost:~# > root@localhost:~# dmesg -c > [ 180.709289] fpga_prot_irq 163 > [ 180.709320] ------------[ cut here ]------------ > [ 180.709350] WARNING: at arch/arm/mach-omap2/omap_l3_noc.c:117 > l3_interrupt_handler+0x144/0x190() > [ 180.709381] L3 custom error: MASTER:MPU TARGET:L4CFG > [ 180.709381] Modules linked in: drv_irq(O) elbit_files(O) fpga(O) > [ 180.709442] [<c001c9a8>] (unwind_backtrace+0x0/0xfc) from > [<c05b7940>] (dump_stack+0x20/0x24) > [ 180.709472] [<c05b7940>] (dump_stack+0x20/0x24) from [<c0042d00>] > (warn_slowpath_common+0x5c/0x74) > [ 180.709503] [<c0042d00>] (warn_slowpath_common+0x5c/0x74) from > [<c0042dd4>] (warn_slowpath_fmt+0x40/0x48) > [ 180.709533] [<c0042dd4>] (warn_slowpath_fmt+0x40/0x48) from > [<c0037288>] (l3_interrupt_handler+0x144/0x190) > [ 180.709564] [<c0037288>] (l3_interrupt_handler+0x144/0x190) from > [<c00bc998>] (handle_irq_event_percpu+0xb8/0x28c) > [ 180.709594] [<c00bc998>] (handle_irq_event_percpu+0xb8/0x28c) from > [<c00bcbb8>] (handle_irq_event+0x4c/0x6c) > [ 180.709625] [<c00bcbb8>] (handle_irq_event+0x4c/0x6c) from > [<c00bfa38>] (handle_fasteoi_irq+0xd8/0x144) > [ 180.709655] [<c00bfa38>] (handle_fasteoi_irq+0xd8/0x144) from > [<c00bc384>] (generic_handle_irq+0x3c/0x50) > [ 180.709686] [<c00bc384>] (generic_handle_irq+0x3c/0x50) from > [<c0015090>] (handle_IRQ+0x88/0xc8) > [ 180.709716] [<c0015090>] (handle_IRQ+0x88/0xc8) from [<c00086d4>] > (gic_handle_irq+0x54/0x74) > [ 180.709747] [<c00086d4>] (gic_handle_irq+0x54/0x74) from > [<c05bb880>] (__irq_svc+0x40/0x70) > [ 180.709777] Exception stack(0xeb4bfcb8 to 0xeb4bfd00) > [ 180.709777] fca0: > c08ebc90 60000113 > [ 180.709808] fcc0: 00000001 00000000 c08ebc40 00000001 c08ebc40 > eb417c40 00000000 00000000 > [ 180.709838] fce0: eb76e000 eb4bfd0c eb4bfd10 eb4bfd00 c00bc58c > c05baf08 60000113 ffffffff > [ 180.709869] [<c05bb880>] (__irq_svc+0x40/0x70) from [<c05baf08>] > (_raw_spin_unlock_irqrestore+0x2c/0x54) > [ 180.709899] [<c05baf08>] (_raw_spin_unlock_irqrestore+0x2c/0x54) > from [<c00bc58c>] (__irq_put_desc_unlock+0x24/0x48) > [ 180.709930] [<c00bc58c>] (__irq_put_desc_unlock+0x24/0x48) from > [<c00c0024>] (irq_set_irq_type+0x5c/0x68) > [ 180.709960] [<c00c0024>] (irq_set_irq_type+0x5c/0x68) from > [<bf0140ec>] (elbit_irq_open+0x48/0xb4 [drv_irq]) > [ 180.709991] [<bf0140ec>] (elbit_irq_open+0x48/0xb4 [drv_irq]) from > [<c014863c>] (chrdev_open+0x134/0x154) > [ 180.710021] [<c014863c>] (chrdev_open+0x134/0x154) from > [<c01428dc>] (__dentry_open+0x1b4/0x2c0) > [ 180.710052] [<c01428dc>] (__dentry_open+0x1b4/0x2c0) from > [<c0142ac4>] (nameidata_to_filp+0x64/0x74) > [ 180.710083] [<c0142ac4>] (nameidata_to_filp+0x64/0x74) from > [<c01530f8>] (do_last+0x91c/0xaac) > [ 180.710113] [<c01530f8>] (do_last+0x91c/0xaac) from [<c015335c>] > (path_openat+0xd4/0x3ac) > [ 180.710113] [<c015335c>] (path_openat+0xd4/0x3ac) from [<c0153734>] > (do_filp_open+0x40/0x8c) > [ 180.710144] [<c0153734>] (do_filp_open+0x40/0x8c) from [<c0142538>] > (do_sys_open+0xf8/0x188) > [ 180.710174] [<c0142538>] (do_sys_open+0xf8/0x188) from [<c0142610>] > (sys_open+0x2c/0x30) > [ 180.710205] [<c0142610>] (sys_open+0x2c/0x30) from [<c0013f00>] > (ret_fast_syscall+0x0/0x30) > [ 180.710205] ---[ end trace 784577ce70100618 ]--- > [ 180.710235] Can't get irq 163 > root@localhost:~# > > > Best Regards, > Ran -- 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
