Hi,
I encountered a kernel crash while integrating Pixcir touchscreen
driver with one of our hardware. The log is attached at the end of the
mail (inline).
The following ISR code:
while (!tsdata->exiting) {
pixcir_ts_poscheck(tsdata);
if (tsdata->chip->attb_read_val())
break;
msleep(20);
}
seems to run until the if condition is false. However, when it exits
the loop (when the condition becomes true), it crashes saying "exiting
task "irq/438-pixcir_" (1011) is an active IRQ thread".
I have 2 questions here:
1. Do we need such a loop and the if condition. In my case it worked
with the isr just doing
pixcir_ts_poscheck(tsdata);
2. What exactly is expected by attb_read_val() function.
Any pointers would be helpful.
*****
Unable to handle kernel paging request at virtual address e7fddef0
pgd = cf9e4000
[e7fddef0] *pgd=00000000
Internal error: Oops: 80000005 [#1] PREEMPT SMP ARM
Modules linked in:
CPU: 1 Not tainted (3.4.0-rc3-00050-g718e84c-dirty #24)
PC is at 0xe7fddef0
LR is at pixcir_ts_isr+0x7c/0x210
pc : [<e7fddef0>] lr : [<c01aaa68>] psr: 60000013
sp : cef83f50 ip : 00000000 fp : 00000001
r10: cf8ce780 r9 : 00000001 r8 : 00000000
r7 : 00000000 r6 : 00000000 r5 : 00000000 r4 : 000000fc
r3 : e7fddef0 r2 : cef83f48 r1 : 60000013 r0 : 00000000
Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel
Control: 10c5387d Table: 4f9e404a DAC: 00000015
Process irq/438-pixcir_ (pid: 1011, stack limit = 0xcef822f0)
Stack: (0xcef83f50 to 0xcef84000)
3f40: cef83f8c 00000256 c0367f80 56000180
3f60: 0000fc02 00000000 00000001 cef82000 cebdc720 00000001 cebdc700 c0380a40
3f80: c0380a94 c038c670 00000000 c00636e8 c0367f80 c03672c0 00000001 cf833dfc
3fa0: cebdc700 c00635ec 00000013 00000000 00000000 00000000 00000000 c0038bd4
3fc0: 00000000 cebdc700 00000000 00000000 00000000 dead4ead ffffffff ffffffff
3fe0: cef83fe0 cef83fe0 cf833dfc c0038b50 c000f02c c000f02c 00002468 00000000
[<c01aaa68>] (pixcir_ts_isr+0x7c/0x210) from [<c00636e8>]
(irq_thread+0xfc/0x14c)
[<c00636e8>] (irq_thread+0xfc/0x14c) from [<c0038bd4>] (kthread+0x84/0x90)
[<c0038bd4>] (kthread+0x84/0x90) from [<c000f02c>] (kernel_thread_exit+0x0/0x8)
Code: bad PC value
---[ end trace cbb10841fae7b402 ]---
exiting task "irq/438-pixcir_" (1011) is an active IRQ thread (irq 438)
--
Regards,
Sachin
--
To unsubscribe from this list: send the line "unsubscribe linux-input" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
