RDMA: Change capability fields in ib_device_attr from int to u32

The capability counter fields in struct ib_device_attr are declared
as signed int, but these values are inherently non-negative. Drivers
maintain their cached caps as u32 and assign them directly into these
int fields; if a cap exceeds INT_MAX the implicit narrowing yields a
negative value visible to the IB core.

Change the signed int capability fields to u32 to match the
underlying nature of the data. Also update consumers across the IB
core, ULPs, NVMe-oF target, RDS, and NFS/RDMA so the new u32 values
are not forced back through signed int or u8 via min()/min_t() or
narrowing local variables.

The nvmet-rdma consumer of max_srq clamps it against
ib_device.num_comp_vectors, which stays a signed int, so that site
uses min_t() instead of min() to handle the signed/unsigned mismatch.

Suggested-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Erni Sri Satya Vennela <ernis@linux.microsoft.com>
Link: https://patch.msgid.link/20260709055211.2498307-1-ernis@linux.microsoft.com
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Stefan Metzmacher <metze@samba.org> # smbdirect
Signed-off-by: Leon Romanovsky <leon@kernel.org>

3 files changed, 29 insertions, 29 deletions

diff --git a/include/linux/sunrpc/svc_rdma.h b/include/linux/sunrpc/svc_rdma.h
index 5aadb47b3b0e..76aa5ec4ab40 100644
--- a/include/linux/sunrpc/svc_rdma.h
+++ b/include/linux/sunrpc/svc_rdma.h
@@ -77,8 +77,8 @@ struct svcxprt_rdma {
 	struct rdma_cm_id    *sc_cm_id;		/* RDMA connection id */
 	struct list_head     sc_accept_q;	/* Conn. waiting accept */
 	struct rpcrdma_notification sc_rn;	/* removal notification */
-	int		     sc_ord;		/* RDMA read limit */
-	int                  sc_max_send_sges;
+	u32		     sc_ord;		/* RDMA read limit */
+	unsigned int         sc_max_send_sges;
 	bool		     sc_snd_w_inv;	/* OK to use Send With Invalidate */
 
 	atomic_t             sc_sq_avail;	/* SQEs ready to be consumed */
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 794746de8db0..8d82d303b723 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -407,36 +407,36 @@ struct ib_device_attr {
 	u32			vendor_id;
 	u32			vendor_part_id;
 	u32			hw_ver;
-	int			max_qp;
-	int			max_qp_wr;
+	u32			max_qp;
+	u32			max_qp_wr;
 	u64			device_cap_flags;
 	u64			kernel_cap_flags;
-	int			max_send_sge;
-	int			max_recv_sge;
-	int			max_sge_rd;
-	int			max_cq;
-	int			max_cqe;
-	int			max_mr;
-	int			max_pd;
-	int			max_qp_rd_atom;
-	int			max_ee_rd_atom;
-	int			max_res_rd_atom;
-	int			max_qp_init_rd_atom;
-	int			max_ee_init_rd_atom;
+	u32			max_send_sge;
+	u32			max_recv_sge;
+	u32			max_sge_rd;
+	u32			max_cq;
+	u32			max_cqe;
+	u32			max_mr;
+	u32			max_pd;
+	u32			max_qp_rd_atom;
+	u32			max_ee_rd_atom;
+	u32			max_res_rd_atom;
+	u32			max_qp_init_rd_atom;
+	u32			max_ee_init_rd_atom;
 	enum ib_atomic_cap	atomic_cap;
 	enum ib_atomic_cap	masked_atomic_cap;
-	int			max_ee;
-	int			max_rdd;
-	int			max_mw;
-	int			max_raw_ipv6_qp;
-	int			max_raw_ethy_qp;
-	int			max_mcast_grp;
-	int			max_mcast_qp_attach;
-	int			max_total_mcast_qp_attach;
-	int			max_ah;
-	int			max_srq;
-	int			max_srq_wr;
-	int			max_srq_sge;
+	u32			max_ee;
+	u32			max_rdd;
+	u32			max_mw;
+	u32			max_raw_ipv6_qp;
+	u32			max_raw_ethy_qp;
+	u32			max_mcast_grp;
+	u32			max_mcast_qp_attach;
+	u32			max_total_mcast_qp_attach;
+	u32			max_ah;
+	u32			max_srq;
+	u32			max_srq_wr;
+	u32			max_srq_sge;
 	unsigned int		max_fast_reg_page_list_len;
 	unsigned int		max_pi_fast_reg_page_list_len;
 	u16			max_pkeys;
diff --git a/include/rdma/restrack.h b/include/rdma/restrack.h
index 451f99e3717d..c081384740ce 100644
--- a/include/rdma/restrack.h
+++ b/include/rdma/restrack.h
@@ -123,7 +123,7 @@ struct rdma_restrack_entry {
 	u32 id;
 };
 
-int rdma_restrack_count(struct ib_device *dev, enum rdma_restrack_type type,
+u32 rdma_restrack_count(struct ib_device *dev, enum rdma_restrack_type type,
 			bool show_details);
 /**
  * rdma_is_kernel_res() - check the owner of resource