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vfio: fix boundary check in region search

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A previously mapped region is skipped during the search, leading to
DMA unmap fails.

This patch fixes it and rewords the comment.

Fixes: 73a639085938 ("vfio: allow to map other memory regions")

Signed-off-by: Xiao Wang <xiao.w.wang@intel.com>
Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>
This commit is contained in:
Xiao Wang 2018-04-20 23:10:50 +08:00 committed by Thomas Monjalon
parent e37effdc3d
commit b3a022b17c
1 changed files with 4 additions and 4 deletions
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8
lib/librte_eal/linuxapp/eal/eal_vfio.c
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@ -220,15 +220,15 @@ find_user_mem_map(uint64_t addr, uint64_t iova, uint64_t len)
/* check start VA */
if (addr < map->addr || addr >= map_va_end)
continue;
/* check if IOVA end is within boundaries */
if (va_end <= map->addr || va_end >= map_va_end)
/* check if VA end is within boundaries */
if (va_end <= map->addr || va_end > map_va_end)
continue;
/* check start PA */
/* check start IOVA */
if (iova < map->iova || iova >= map_iova_end)
continue;
/* check if IOVA end is within boundaries */
if (iova_end <= map->iova || iova_end >= map_iova_end)
if (iova_end <= map->iova || iova_end > map_iova_end)
continue;
/* we've found our map */