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IB/ipath: Fix offset returned to ibv_resize_cq()

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The wrong offset was being returned to libipathverbs so that when
ibv_resize_cq() calls mmap(), it always fails.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Ralph Campbell 2007-11-06 17:51:38 -08:00 committed by Roland Dreier
parent 2ffbb8377c
commit fb74dacb0f
1 changed files with 14 additions and 5 deletions
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19
drivers/infiniband/hw/ipath/ipath_cq.c
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@ -395,12 +395,9 @@ int ipath_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata)
goto bail; goto bail;
} }
/* /* Check that we can write the offset to mmap. */
* Return the address of the WC as the offset to mmap.
* See ipath_mmap() for details.
*/
if (udata && udata->outlen >= sizeof(__u64)) { if (udata && udata->outlen >= sizeof(__u64)) {
__u64 offset = (__u64) wc; __u64 offset = 0;
ret = ib_copy_to_udata(udata, &offset, sizeof(offset)); ret = ib_copy_to_udata(udata, &offset, sizeof(offset));
if (ret) if (ret)
@ -450,6 +447,18 @@ int ipath_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata)
struct ipath_mmap_info *ip = cq->ip; struct ipath_mmap_info *ip = cq->ip;
ipath_update_mmap_info(dev, ip, sz, wc); ipath_update_mmap_info(dev, ip, sz, wc);
/*
* Return the offset to mmap.
* See ipath_mmap() for details.
*/
if (udata && udata->outlen >= sizeof(__u64)) {
ret = ib_copy_to_udata(udata, &ip->offset,
sizeof(ip->offset));
if (ret)
goto bail;
}
spin_lock_irq(&dev->pending_lock); spin_lock_irq(&dev->pending_lock);
if (list_empty(&ip->pending_mmaps)) if (list_empty(&ip->pending_mmaps))
list_add(&ip->pending_mmaps, &dev->pending_mmaps); list_add(&ip->pending_mmaps, &dev->pending_mmaps);