kern/128040: System hangs when PCMCIA-CF adapter plugged into cardbus slot

Arthur Hartwig arthur.hartwig at nokia.com
Mon Oct 13 03:20:02 UTC 2008


>Number:         128040
>Category:       kern
>Synopsis:       System hangs when PCMCIA-CF adapter plugged into cardbus slot
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Oct 13 03:20:00 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator:     Arthur Hartwig
>Release:        6.3
>Organization:
Nokia
>Environment:
>Description:
All systems discussed have a TI PCI1520 PCI Cardbus bridge.

On system with Celeron 1.5GHz CPU, sometimes when a PCMCIA to Compact Flash adapter containing a Compact Flash card is inserted in the cardbus slot the system hangs. This problem has not been observed in systems with a 2.8GHz XEON CPU or faster.

Analysis of the cbb driver shows functional interrupts are routed to PCI BEFORE the interrupt handler for functional interrupts has been registered.
>How-To-Repeat:

>Fix:
Route the functional interrupts to PCI AFTER the functional interrupt handler has been registered.

In cbb_power() in sys/dev/pccbb/pccbb.c remove the 
	PCI_MASK_CONFIG(brdev, CBBR_BRIDGECTRL,
	    & ~CBBM_BRIDGECTRL_INTR_IREQ_ISA_EN, 2);

and add it to cbb_enable_func_intr() after the 
        exca_putb(&sc->exca[0], EXCA_INTR, reg);


>Release-Note:
>Audit-Trail:
>Unformatted:


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