The Oops(LR= C00C4F38)is due to lwz r9,40(r31)
the last two line in the hc_add_trans function:
memcpy (ptd + 8, data, len);
hp->tlp += ((len + 8 +3) & ~03);
bl 2C290 is the address of memcpy function
and lwz r9,40(r31) is
mapping to get hp->tlp value. I do not understand why here got the Oops
as the hp->tlp has been fretched one time before set up those ptd array
without error.
disasm PPC code:
000C4F1C: 386C0008 addi r3,r12,0x0008
000C4F20: 7F84E378 or
r4,r28,r28
000C4F24: 9B6C0000 stb
r27,0(r12) (EA: 00000000)
000C4F28: 9BAC0002 stb
r29,2(r12) (EA: 00000002)
000C4F2C: 9BCC0004 stb
r30,4(r12) (EA: 00000004)
000C4F30: 7FC5F378 or
r5,r30,r30
000C4F34: 4BF6735D bl
0x0002C290
000C4F38: 813F0028
lwz r9,40(r31)
(EA: 00000028)
000C4F3C: 381E000B addi r0,r30,0x000B
Li Yi
Benjamin Herrenschmidt wrote:
>
>I have problems with hub function of isp1161 V0.8, it Oops whenever I plug
>in any USB devices like keyboard or mouse through a Belkin F5U100 Hub. But
>if I plug the keyboard into the roothub OR if nothing on the hub,
>everything is fine. Can you repeat it?Could you get some backtrace symbols for the oops ?
One oops I found and fixed locally was to not handle the delete list
if hc->trans is non-NULL (in the interrupt handler). There were some
rare occasions where the delete list could be run because of a different
interrupt (SOF for example) while there was still a pending hc->trans,
possibly making the URB pointers in the trans array invalid.Ben.
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