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authorRoland Dreier <rolandd@cisco.com>2007-10-09 19:59:18 -0700
committerRoland Dreier <rolandd@cisco.com>2007-10-09 19:59:18 -0700
commit76dea3bc2644e99cce1d98d0bbd3124314e5b50a (patch)
tree14ffcb341294948c429274922cbe6a4bcedcf5bb /drivers/infiniband
parentede6bc04f3a07a9c93f02c92cdc281d254398321 (diff)
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IB/ehca: Fix clipping of device limits to INT_MAX
Doing min_t(int, foo, INT_MAX) doesn't work correctly, because if foo is bigger than INT_MAX, then when treated as a signed integer, it will become negative and hence such an expression is just an elaborate NOP. Fix such cases in ehca to do min_t(unsigned, foo, INT_MAX) instead. This fixes negative reported values for max_cqe, max_pd and max_ah: Before: max_cqe: -64 max_pd: -1 max_ah: -1 After: max_cqe: 2147483647 max_pd: 2147483647 max_ah: 2147483647 Based on a bug report and fix from Anton Blanchard <anton@samba.org>. Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/hw/ehca/ehca_hca.c32
1 files changed, 16 insertions, 16 deletions
diff --git a/drivers/infiniband/hw/ehca/ehca_hca.c b/drivers/infiniband/hw/ehca/ehca_hca.c
index 3436c49eee06..4aa3ffa6a19f 100644
--- a/drivers/infiniband/hw/ehca/ehca_hca.c
+++ b/drivers/infiniband/hw/ehca/ehca_hca.c
@@ -82,17 +82,17 @@ int ehca_query_device(struct ib_device *ibdev, struct ib_device_attr *props)
props->vendor_id = rblock->vendor_id >> 8;
props->vendor_part_id = rblock->vendor_part_id >> 16;
props->hw_ver = rblock->hw_ver;
- props->max_qp = min_t(int, rblock->max_qp, INT_MAX);
- props->max_qp_wr = min_t(int, rblock->max_wqes_wq, INT_MAX);
- props->max_sge = min_t(int, rblock->max_sge, INT_MAX);
- props->max_sge_rd = min_t(int, rblock->max_sge_rd, INT_MAX);
- props->max_cq = min_t(int, rblock->max_cq, INT_MAX);
- props->max_cqe = min_t(int, rblock->max_cqe, INT_MAX);
- props->max_mr = min_t(int, rblock->max_mr, INT_MAX);
- props->max_mw = min_t(int, rblock->max_mw, INT_MAX);
- props->max_pd = min_t(int, rblock->max_pd, INT_MAX);
- props->max_ah = min_t(int, rblock->max_ah, INT_MAX);
- props->max_fmr = min_t(int, rblock->max_mr, INT_MAX);
+ props->max_qp = min_t(unsigned, rblock->max_qp, INT_MAX);
+ props->max_qp_wr = min_t(unsigned, rblock->max_wqes_wq, INT_MAX);
+ props->max_sge = min_t(unsigned, rblock->max_sge, INT_MAX);
+ props->max_sge_rd = min_t(unsigned, rblock->max_sge_rd, INT_MAX);
+ props->max_cq = min_t(unsigned, rblock->max_cq, INT_MAX);
+ props->max_cqe = min_t(unsigned, rblock->max_cqe, INT_MAX);
+ props->max_mr = min_t(unsigned, rblock->max_mr, INT_MAX);
+ props->max_mw = min_t(unsigned, rblock->max_mw, INT_MAX);
+ props->max_pd = min_t(unsigned, rblock->max_pd, INT_MAX);
+ props->max_ah = min_t(unsigned, rblock->max_ah, INT_MAX);
+ props->max_fmr = min_t(unsigned, rblock->max_mr, INT_MAX);
if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
props->max_srq = props->max_qp;
@@ -104,15 +104,15 @@ int ehca_query_device(struct ib_device *ibdev, struct ib_device_attr *props)
props->local_ca_ack_delay
= rblock->local_ca_ack_delay;
props->max_raw_ipv6_qp
- = min_t(int, rblock->max_raw_ipv6_qp, INT_MAX);
+ = min_t(unsigned, rblock->max_raw_ipv6_qp, INT_MAX);
props->max_raw_ethy_qp
- = min_t(int, rblock->max_raw_ethy_qp, INT_MAX);
+ = min_t(unsigned, rblock->max_raw_ethy_qp, INT_MAX);
props->max_mcast_grp
- = min_t(int, rblock->max_mcast_grp, INT_MAX);
+ = min_t(unsigned, rblock->max_mcast_grp, INT_MAX);
props->max_mcast_qp_attach
- = min_t(int, rblock->max_mcast_qp_attach, INT_MAX);
+ = min_t(unsigned, rblock->max_mcast_qp_attach, INT_MAX);
props->max_total_mcast_qp_attach
- = min_t(int, rblock->max_total_mcast_qp_attach, INT_MAX);
+ = min_t(unsigned, rblock->max_total_mcast_qp_attach, INT_MAX);
/* translate device capabilities */
props->device_cap_flags = IB_DEVICE_SYS_IMAGE_GUID |