On 11/27/18 9:41 PM, James Bottomley wrote:
> On Wed, 2018-11-28 at 15:38 +1100, Stephen Rothwell wrote:
>> Hi all,
>>
>> On Tue, 27 Nov 2018 20:14:58 -0800 Randy Dunlap <rdunlap@xxxxxxxxxxxx
>> g> wrote:
>>>
>>> On 11/26/18 8:25 PM, Stephen Rothwell wrote:
>>>> Hi all,
>>>>
>>>> Changes since 20181126:
>>>>
>>>
>>> on i386:
>>>
>>> ERROR: "__udivdi3" [drivers/scsi/aha1542.ko] undefined!
>>>
>>> somewhere in aha1542_interrupt() according to objdump.
>>
>> Presumably caused by commit
>>
>> 1794ef2b150d ("scsi: aha1542: convert to DMA mapping API")
>
> Yes, it's because dma_addr_t can be u64 on pae systems but
> isa_virt_to_bus only ever returns unsigned long (because an ISA
> physical address can only be 24 bits).
>
> I think this is the fix; there doesn't seem to be much point converting
> to do_div given all the limitations.
>
> James
Yes, that works. Thanks.
Acked-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
> ---
>
> diff --git a/drivers/scsi/aha1542.c b/drivers/scsi/aha1542.c
> index a9c29757172f..afb693d7b44f 100644
> --- a/drivers/scsi/aha1542.c
> +++ b/drivers/scsi/aha1542.c
> @@ -325,7 +325,7 @@ static irqreturn_t aha1542_interrupt(int irq, void *dev_id)
> return IRQ_HANDLED;
> };
>
> - mbo = (scsi2int(mb[mbi].ccbptr) - aha1542->ccb_handle) / sizeof(struct ccb);
> + mbo = (scsi2int(mb[mbi].ccbptr) - (unsigned long)aha1542->ccb_handle) / sizeof(struct ccb);
> mbistatus = mb[mbi].status;
> mb[mbi].status = 0;
> aha1542->aha1542_last_mbi_used = mbi;
>
--
~Randy
