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net/xen-netback: off by one in BUG_ON() condition

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The > should be >=.  I also added spaces around the '-' operations so
the code is a little more consistent and matches the condition better.

Fixes: f53c3fe8da ('xen-netback: Introduce TX grant mapping')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dan Carpenter 2015-07-12 01:20:55 +03:00 committed by David S. Miller
parent f760b87f8f
commit 50c2e4dd67
1 changed files with 3 additions and 3 deletions
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6
drivers/net/xen-netback/netback.c
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@ -1566,13 +1566,13 @@ static inline void xenvif_tx_dealloc_action(struct xenvif_queue *queue)
smp_rmb();
while (dc != dp) {
BUG_ON(gop - queue->tx_unmap_ops > MAX_PENDING_REQS);
BUG_ON(gop - queue->tx_unmap_ops >= MAX_PENDING_REQS);
pending_idx =
queue->dealloc_ring[pending_index(dc++)];
pending_idx_release[gop-queue->tx_unmap_ops] =
pending_idx_release[gop - queue->tx_unmap_ops] =
pending_idx;
queue->pages_to_unmap[gop-queue->tx_unmap_ops] =
queue->pages_to_unmap[gop - queue->tx_unmap_ops] =
queue->mmap_pages[pending_idx];
gnttab_set_unmap_op(gop,
idx_to_kaddr(queue, pending_idx),