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path: root/drivers/infiniband/hw
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Diffstat (limited to 'drivers/infiniband/hw')
-rw-r--r--drivers/infiniband/hw/ipath/ipath_srq.c42
1 files changed, 25 insertions, 17 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_srq.c b/drivers/infiniband/hw/ipath/ipath_srq.c
index 40c36ec1901..434da6270f6 100644
--- a/drivers/infiniband/hw/ipath/ipath_srq.c
+++ b/drivers/infiniband/hw/ipath/ipath_srq.c
@@ -211,11 +211,11 @@ int ipath_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
struct ib_udata *udata)
{
struct ipath_srq *srq = to_isrq(ibsrq);
+ struct ipath_rwq *wq;
int ret = 0;
if (attr_mask & IB_SRQ_MAX_WR) {
struct ipath_rwq *owq;
- struct ipath_rwq *wq;
struct ipath_rwqe *p;
u32 sz, size, n, head, tail;
@@ -236,27 +236,20 @@ int ipath_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
goto bail;
}
- /*
- * Return the address of the RWQ as the offset to mmap.
- * See ipath_mmap() for details.
- */
+ /* Check that we can write the offset to mmap. */
if (udata && udata->inlen >= sizeof(__u64)) {
__u64 offset_addr;
- __u64 offset = (__u64) wq;
+ __u64 offset = 0;
ret = ib_copy_from_udata(&offset_addr, udata,
sizeof(offset_addr));
- if (ret) {
- vfree(wq);
- goto bail;
- }
+ if (ret)
+ goto bail_free;
udata->outbuf = (void __user *) offset_addr;
ret = ib_copy_to_udata(udata, &offset,
sizeof(offset));
- if (ret) {
- vfree(wq);
- goto bail;
- }
+ if (ret)
+ goto bail_free;
}
spin_lock_irq(&srq->rq.lock);
@@ -277,10 +270,8 @@ int ipath_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
else
n -= tail;
if (size <= n) {
- spin_unlock_irq(&srq->rq.lock);
- vfree(wq);
ret = -EINVAL;
- goto bail;
+ goto bail_unlock;
}
n = 0;
p = wq->wq;
@@ -314,6 +305,18 @@ int ipath_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
u32 s = sizeof(struct ipath_rwq) + size * sz;
ipath_update_mmap_info(dev, ip, s, wq);
+
+ /*
+ * Return the offset to mmap.
+ * See ipath_mmap() for details.
+ */
+ if (udata && udata->inlen >= 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,
@@ -328,7 +331,12 @@ int ipath_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
srq->limit = attr->srq_limit;
spin_unlock_irq(&srq->rq.lock);
}
+ goto bail;
+bail_unlock:
+ spin_unlock_irq(&srq->rq.lock);
+bail_free:
+ vfree(wq);
bail:
return ret;
}