Re: [PATCH v3] RDMA/siw: Fix 64/32bit pointer inconsistency

[Leon Romanovsky <leon@kernel.org>]

On Thu, Aug 22, 2019 at 07:37:38PM +0200, Bernard Metzler wrote:
> Fixes improper casting between addresses and unsigned types.
> Changes siw_pbl_get_buffer() function to return appropriate
> dma_addr_t, and not u64.
>
> Also fixes debug prints. Now any potentially kernel private
> pointers are printed formatted as '%pK', to allow keeping that
> information secret.
>
> Fixes: d941bfe500be ("RDMA/siw: Change CQ flags from 64->32 bits")
> Fixes: b0fff7317bb4 ("rdma/siw: completion queue methods")
> Fixes: 8b6a361b8c48 ("rdma/siw: receive path")
> Fixes: b9be6f18cf9e ("rdma/siw: transmit path")
> Fixes: f29dd55b0236 ("rdma/siw: queue pair methods")
> Fixes: 2251334dcac9 ("rdma/siw: application buffer management")
> Fixes: 303ae1cdfdf7 ("rdma/siw: application interface")
> Fixes: 6c52fdc244b5 ("rdma/siw: connection management")
> Fixes: a531975279f3 ("rdma/siw: main include file")
>
> Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
> Reported-by: Jason Gunthorpe <jgg@ziepe.ca>
> Reported-by: Leon Romanovsky <leon@kernel.org>
> Signed-off-by: Bernard Metzler <bmt@zurich.ibm.com>
> ---
>  drivers/infiniband/sw/siw/siw.h       |  8 +--
>  drivers/infiniband/sw/siw/siw_cm.c    | 74 ++++++++++++---------------
>  drivers/infiniband/sw/siw/siw_cq.c    |  5 +-
>  drivers/infiniband/sw/siw/siw_mem.c   | 14 ++---
>  drivers/infiniband/sw/siw/siw_mem.h   |  2 +-
>  drivers/infiniband/sw/siw/siw_qp.c    |  2 +-
>  drivers/infiniband/sw/siw/siw_qp_rx.c | 26 +++++-----
>  drivers/infiniband/sw/siw/siw_qp_tx.c | 43 ++++++++--------
>  drivers/infiniband/sw/siw/siw_verbs.c | 40 +++++++--------
>  9 files changed, 106 insertions(+), 108 deletions(-)
>
> diff --git a/drivers/infiniband/sw/siw/siw.h b/drivers/infiniband/sw/siw/siw.h
> index 77b1aabf6ff3..dba4535494ab 100644
> --- a/drivers/infiniband/sw/siw/siw.h
> +++ b/drivers/infiniband/sw/siw/siw.h
> @@ -138,9 +138,9 @@ struct siw_umem {
>  };
>
>  struct siw_pble {
> -	u64 addr; /* Address of assigned user buffer */
> -	u64 size; /* Size of this entry */
> -	u64 pbl_off; /* Total offset from start of PBL */
> +	dma_addr_t addr; /* Address of assigned buffer */
> +	unsigned int size; /* Size of this entry */
> +	unsigned long pbl_off; /* Total offset from start of PBL */
>  };
>
>  struct siw_pbl {
> @@ -734,7 +734,7 @@ static inline void siw_crc_skb(struct siw_rx_stream *srx, unsigned int len)
>  		  "MEM[0x%08x] %s: " fmt, mem->stag, __func__, ##__VA_ARGS__)
>
>  #define siw_dbg_cep(cep, fmt, ...)                                             \
> -	ibdev_dbg(&cep->sdev->base_dev, "CEP[0x%p] %s: " fmt,                  \
> +	ibdev_dbg(&cep->sdev->base_dev, "CEP[0x%pK] %s: " fmt,                  \
>  		  cep, __func__, ##__VA_ARGS__)
>
>  void siw_cq_flush(struct siw_cq *cq);
> diff --git a/drivers/infiniband/sw/siw/siw_cm.c b/drivers/infiniband/sw/siw/siw_cm.c
> index 9ce8a1b925d2..ae7ea3ad7224 100644
> --- a/drivers/infiniband/sw/siw/siw_cm.c
> +++ b/drivers/infiniband/sw/siw/siw_cm.c
> @@ -355,8 +355,8 @@ static int siw_cm_upcall(struct siw_cep *cep, enum iw_cm_event_type reason,
>  		getname_local(cep->sock, &event.local_addr);
>  		getname_peer(cep->sock, &event.remote_addr);
>  	}
> -	siw_dbg_cep(cep, "[QP %u]: id 0x%p, reason=%d, status=%d\n",
> -		    cep->qp ? qp_id(cep->qp) : -1, id, reason, status);
> +	siw_dbg_cep(cep, "[QP %u]: reason=%d, status=%d\n",
> +		    cep->qp ? qp_id(cep->qp) : -1, reason, status);
                                             ^^^^
There is a chance that such construction (attempt to print -1 with %u)
will generate some sort of warning.

Thanks