diff options
| author | Andrzej Hajda <a.hajda@samsung.com> | 2015-09-21 15:33:36 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-10-04 20:50:05 +0200 |
| commit | 43b2ec01d2140964d98ea7812ca2f9dff67d2db2 (patch) | |
| tree | fb8f06925406ac3a154a29678da57de752723260 | |
| parent | RDMA/amso1100: use offset_in_page macro (diff) | |
| download | linux-43b2ec01d2140964d98ea7812ca2f9dff67d2db2.tar.xz linux-43b2ec01d2140964d98ea7812ca2f9dff67d2db2.zip | |
IB/ehca: fix handling idr_alloc result
The function can return negative value.
The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci [1].
[1]: http://permalink.gmane.org/gmane.linux.kernel/2038576
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Acked-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/staging/rdma/ehca/ehca_cq.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/staging/rdma/ehca/ehca_cq.c b/drivers/staging/rdma/ehca/ehca_cq.c index 9b68b175069b..ea1b5c1203b4 100644 --- a/drivers/staging/rdma/ehca/ehca_cq.c +++ b/drivers/staging/rdma/ehca/ehca_cq.c @@ -130,7 +130,7 @@ struct ib_cq *ehca_create_cq(struct ib_device *device, void *vpage; u32 counter; u64 rpage, cqx_fec, h_ret; - int ipz_rc, i; + int rc, i; unsigned long flags; if (attr->flags) @@ -170,16 +170,17 @@ struct ib_cq *ehca_create_cq(struct ib_device *device, idr_preload(GFP_KERNEL); write_lock_irqsave(&ehca_cq_idr_lock, flags); - my_cq->token = idr_alloc(&ehca_cq_idr, my_cq, 0, 0x2000000, GFP_NOWAIT); + rc = idr_alloc(&ehca_cq_idr, my_cq, 0, 0x2000000, GFP_NOWAIT); write_unlock_irqrestore(&ehca_cq_idr_lock, flags); idr_preload_end(); - if (my_cq->token < 0) { + if (rc < 0) { cq = ERR_PTR(-ENOMEM); ehca_err(device, "Can't allocate new idr entry. device=%p", device); goto create_cq_exit1; } + my_cq->token = rc; /* * CQs maximum depth is 4GB-64, but we need additional 20 as buffer @@ -195,11 +196,11 @@ struct ib_cq *ehca_create_cq(struct ib_device *device, goto create_cq_exit2; } - ipz_rc = ipz_queue_ctor(NULL, &my_cq->ipz_queue, param.act_pages, + rc = ipz_queue_ctor(NULL, &my_cq->ipz_queue, param.act_pages, EHCA_PAGESIZE, sizeof(struct ehca_cqe), 0, 0); - if (!ipz_rc) { + if (!rc) { ehca_err(device, "ipz_queue_ctor() failed ipz_rc=%i device=%p", - ipz_rc, device); + rc, device); cq = ERR_PTR(-EINVAL); goto create_cq_exit3; } |