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ahci: Fix sglist offset manipulation for BE machines 

This does not bother DMA, because DMA generally transfers
the entire SGList in one shot if it can.

PIO, on the other hand, tries to transfer just one sector
at a time, and will make multiple visits to the sglist
to fetch memory addresses.

Fix the memory address calculaton when we have an offset
by moving the offset addition OUTSIDE of the le64_to_cpu
calculation.

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Tested-by: Andreas Färber <afaerber@suse.de>
Message-id: 1426811056-2202-4-git-send-email-jsnow@redhat.com
This commit is contained in:
John Snow 2015-03-19 20:24:15 -04:00
parent dd0bf7baab
commit ac38123609
1 changed files with 1 additions and 1 deletions
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2
hw/ide/ahci.c
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@ -799,7 +799,7 @@ static int ahci_populate_sglist(AHCIDevice *ad, QEMUSGList *sglist,
qemu_sglist_init(sglist, qbus->parent, (sglist_alloc_hint - off_idx),
ad->hba->as);
qemu_sglist_add(sglist, le64_to_cpu(tbl[off_idx].addr + off_pos),
qemu_sglist_add(sglist, le64_to_cpu(tbl[off_idx].addr) + off_pos,
prdt_tbl_entry_size(&tbl[off_idx]) - off_pos);
for (i = off_idx + 1; i < sglist_alloc_hint; i++) {