On 09/21/2015 09:33 AM, Andrzej Hajda wrote: > 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@xxxxxxxxxxx> Patch looks fine to me. Acked-by: Doug Ledford <dledford@xxxxxxxxxx> > --- > drivers/staging/rdma/ehca/ehca_cq.c | 13 +++++++------ > 1 file changed, 7 insertions(+), 6 deletions(-) > > diff --git a/drivers/staging/rdma/ehca/ehca_cq.c b/drivers/staging/rdma/ehca/ehca_cq.c > index 9b68b17..ea1b5c1 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; > } > -- Doug Ledford <dledford@xxxxxxxxxx> GPG KeyID: 0E572FDD
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