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authorRalph Campbell <ralph.campbell@qlogic.com>2007-11-06 17:51:38 -0800
committerRoland Dreier <rolandd@cisco.com>2007-11-20 11:03:26 -0800
commitfb74dacb0f00dff851c78411773a5bd5d7128b81 (patch)
treed16b6e0e9eb8bd95088db9841b7dfad003184883 /drivers/infiniband
parent2ffbb8377c7a0713baf6644e285adc27a5654582 (diff)
IB/ipath: Fix offset returned to ibv_resize_cq()
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>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/hw/ipath/ipath_cq.c19
1 files changed, 14 insertions, 5 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_cq.c b/drivers/infiniband/hw/ipath/ipath_cq.c
index 08d8ae148cd..d1380c7a170 100644
--- a/drivers/infiniband/hw/ipath/ipath_cq.c
+++ b/drivers/infiniband/hw/ipath/ipath_cq.c
@@ -395,12 +395,9 @@ int ipath_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata)
goto bail;
}
- /*
- * Return the address of the WC as the offset to mmap.
- * See ipath_mmap() for details.
- */
+ /* Check that we can write the offset to mmap. */
if (udata && udata->outlen >= sizeof(__u64)) {
- __u64 offset = (__u64) wc;
+ __u64 offset = 0;
ret = ib_copy_to_udata(udata, &offset, sizeof(offset));
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;
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);
if (list_empty(&ip->pending_mmaps))
list_add(&ip->pending_mmaps, &dev->pending_mmaps);