From 58f423fbd5f7f435e8dc56dfa565b043d20d1e1b Mon Sep 17 00:00:00 2001 From: Kevin Wolf Date: Wed, 9 Jul 2014 19:17:30 +0200 Subject: dma-helpers: Fix too long qiov If the size of the scatter/gather list isn't a multiple of 512, the number of sectors for the block layer request is rounded down, resulting in a qiov that doesn't match the request length. Truncate the qiov to the new length of the request. This fixes the IDE qtest case /x86_64/ide/bmdma/short_prdt. Signed-off-by: Kevin Wolf Reviewed-by: Eric Blake --- include/qemu-common.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/qemu-common.h') diff --git a/include/qemu-common.h b/include/qemu-common.h index ae76197532..6ef8282234 100644 --- a/include/qemu-common.h +++ b/include/qemu-common.h @@ -329,6 +329,7 @@ size_t qemu_iovec_memset(QEMUIOVector *qiov, size_t offset, int fillc, size_t bytes); ssize_t qemu_iovec_compare(QEMUIOVector *a, QEMUIOVector *b); void qemu_iovec_clone(QEMUIOVector *dest, const QEMUIOVector *src, void *buf); +void qemu_iovec_discard_back(QEMUIOVector *qiov, size_t bytes); bool buffer_is_zero(const void *buf, size_t len); -- cgit v1.2.3