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 <[email protected] > 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
---
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;
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