Messages in this thread | | | Date | Mon, 22 Nov 1999 18:35:20 +0530 | From | Raju K V <> | Subject | panic in scsi_register_host() |
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hi,
I am writing a SCSI HBA driver which is compiled as a module. I get a panic with the foll:
Unable to handle kernel NULL pointer dereference at virtual address 0000002c current->tss.cr3=0035f000, %cr3=0035f000 *pde=00000000 Entering kdb on processor 0 due to panic @ 0xc28188af
The panic occures during the spin_unlock_irqrestore() file scsi.c (with some debug printk's inserted), line 2613
if (tpnt->use_new_eh_code) { spin_lock_irqsave(&io_request_lock, flags); tpnt->present = tpnt->detect(tpnt); printk("tpnt->present=%d. line %d file %s\n", tpnt->present,__LINE__,__F ILE__); |----> spin_unlock_irqrestore(&io_request_lock, flags); | This is the place where system panics.
printk("tpnt->present=%d. line %d file %s\n", tpnt->present,__LINE__,__F ILE__); }
The driver is compiled with -D__SMP__. kernel version : 2.2.10 can anybody tell me what is the problem?
Please get back to me if more info is required.
Thanks in advance, Raju
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