-----------------------------------------------------------------------------------------------------------
int ret;
printk("initializing module\n");
//free_irq(7,NULL);
i = register_chrdev (SKELETON_MAJOR, SKELETON_NAME, &skeleton_fops);
if (i != 0) return - EIO;
//disable_irq(7);
ret = request_irq (7, interrupt_handler,0,SKELETON_NAME ,NULL);
printk("ret=%d\n",ret);
//enable_irq(7);
if(ret>=0){
enable_irq(7);
// outb_p(0x10, BASEPORT + 2);
}
else
{
printk("Not Working \n");
}
//printk("Generating interrupt \n");
outb(0, BASEPORT);
outb(255, BASEPORT);
outb(0, BASEPORT);
printk("Interrupt generated. You should see the handler-message\n");
---------------------------------------------------------------------------------------------------------
when i insmod the module of which this is apart.
i get the following output
[ 1291.259646] initializing module
[ 1291.259672] ret=0
[ 1291.259679] ------------[ cut here ]------------
[ 1291.259682] WARNING: at
/build/buildd/linux-2.6.28/kernel/irq/manage.c:225 __enable_irq+0x30/0x70()
[ 1291.259685] Unbalanced enable for IRQ 7
[ 1291.259687] Modules linked in: skeleton(+) hid_bright usbhid rfkill_input
i915 drm binfmt_misc ppdev bridge stp bnep lp parport arc4 ecb snd_hda_intel
snd_pcm_oss snd_mixer_oss snd_pcm pcmcia snd_seq_dummy b43 snd_seq_oss
snd_seq_midi snd_rawmidi mac80211 snd_seq_midi_event cfg80211 iTCO_wdt
iTCO_vendor_support snd_seq snd_timer snd_seq_device yenta_socket
rsrc_nonstatic ricoh_mmc sdhci_pci sdhci snd pcmcia_core led_class intel_agp
agpgart soundcore snd_page_alloc pcspkr input_polldev serio_raw uvcvideo
compat_ioctl32 videodev v4l1_compat video output ohci1394 ieee1394 8139too
8139cp mii ssb fbcon tileblit font bitblit softcursor
[ 1291.259751] Pid: 4400, comm: insmod Not tainted 2.6.28-11-generic
#42-Ubuntu
[ 1291.259754] Call Trace:
[ 1291.259760] [<c0139ab0>] warn_slowpath+0x60/0x80
[ 1291.259765] [<c0181449>] ? register_handler_proc+0x119/0x130
[ 1291.259773] [<c02cc3b8>] ? vsnprintf+0x378/0x5c0
[ 1291.259778] [<c013a2f9>] ? release_console_sem+0x1c9/0x200
[ 1291.259782] [<c017f570>] __enable_irq+0x30/0x70
[ 1291.259786] [<c017f5ec>] enable_irq+0x3c/0x60
[ 1291.259790] [<f7f9c000>] ? skeleton_init_module+0x0/0x96 [skeleton]
[ 1291.259795] [<f7f9c078>] skeleton_init_module+0x78/0x96 [skeleton]
[ 1291.259802] [<c010111e>] _stext+0x2e/0x170
[ 1291.259807] [<c020c015>] ? sysfs_addrm_finish+0x15/0xf0
[ 1291.259811] [<c020b7e3>] ? sysfs_add_one+0x13/0x50
[ 1291.259814] [<c020b85f>] ? sysfs_addrm_start+0x3f/0xa0
[ 1291.259820] [<c01a908c>] ? __vunmap+0x9c/0xe0
[ 1291.259823] [<c01a908c>] ? __vunmap+0x9c/0xe0
[ 1291.259832] [<c01a9121>] ? vfree+0x21/0x30
[ 1291.259837] [<c0163f3a>] ? load_module+0x103a/0x1040
[ 1291.259848] [<c0163fc8>] sys_init_module+0x88/0x1b0
[ 1291.259853] [<c01bb5da>] ? sys_close+0x7a/0xc0
[ 1291.259857] [<c0103f6b>] sysenter_do_call+0x12/0x2f
[ 1291.259865] [<c0500000>] ? relay_hotcpu_callback+0x6d/0xbd
[ 1291.259868] ---[ end trace cddcbfa519faa2fe ]---
[ 1291.259870] Interrupt generated. You should see the handler-message
and the message in the handler doesnt appear.
i am unable to get what is the problem and how can this be solved.
please help me out
--
---------------------
Harinderjit Singh
