On Tue, Feb 13, 2024 at 11:07:13AM +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@xxxxxxxx>
>
> clang-16 notices that srpt_qp_event() gets called through an incompatible
> pointer here:
>
> drivers/infiniband/ulp/srpt/ib_srpt.c:1815:5: error: cast from 'void (*)(struct ib_event *, struct srpt_rdma_ch *)' to 'void (*)(struct ib_event *, void *)' converts to incompatible function type [-Werror,-Wcast-function-type-strict]
> 1815 | = (void(*)(struct ib_event *, void*))srpt_qp_event;
>
> Change srpt_qp_event() to use the correct prototype and adjust the
> argument inside of it.
>
> Fixes: a42d985bd5b2 ("ib_srpt: Initial SRP Target merge for v3.3-rc1")
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> ---
> drivers/infiniband/ulp/srpt/ib_srpt.c | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
This patch generates the following warnings, fixed and applied.
➜ kernel git:(wip/leon-for-rc) mkt ci
f17a855457db (HEAD -> build) RDMA/srpt: fix function pointer cast warnings
drivers/infiniband/ulp/srpt/ib_srpt.c:220: warning: Function parameter or struct member 'ptr' not described in 'srpt_qp_event'
drivers/infiniband/ulp/srpt/ib_srpt.c:220: warning: Excess function parameter 'ch' description in 'srpt_qp_event'
drivers/infiniband/ulp/srpt/ib_srpt.c:220: warning: Function parameter or struct member 'ptr' not described in 'srpt_qp_event'
drivers/infiniband/ulp/srpt/ib_srpt.c:220: warning: Excess function parameter 'ch' description in 'srpt_qp_event'
>
> diff --git a/drivers/infiniband/ulp/srpt/ib_srpt.c b/drivers/infiniband/ulp/srpt/ib_srpt.c
> index 0875f197118f..942b311b6296 100644
> --- a/drivers/infiniband/ulp/srpt/ib_srpt.c
> +++ b/drivers/infiniband/ulp/srpt/ib_srpt.c
> @@ -216,8 +216,10 @@ static const char *get_ch_state_name(enum rdma_ch_state s)
> * @event: Description of the event that occurred.
> * @ch: SRPT RDMA channel.
> */
> -static void srpt_qp_event(struct ib_event *event, struct srpt_rdma_ch *ch)
> +static void srpt_qp_event(struct ib_event *event, void *ptr)
> {
> + struct srpt_rdma_ch *ch = ptr;
> +
> pr_debug("QP event %d on ch=%p sess_name=%s-%d state=%s\n",
> event->event, ch, ch->sess_name, ch->qp->qp_num,
> get_ch_state_name(ch->state));
> @@ -1811,8 +1813,7 @@ static int srpt_create_ch_ib(struct srpt_rdma_ch *ch)
> ch->cq_size = ch->rq_size + sq_size;
>
> qp_init->qp_context = (void *)ch;
> - qp_init->event_handler
> - = (void(*)(struct ib_event *, void*))srpt_qp_event;
> + qp_init->event_handler = srpt_qp_event;
> qp_init->send_cq = ch->cq;
> qp_init->recv_cq = ch->cq;
> qp_init->sq_sig_type = IB_SIGNAL_REQ_WR;
> --
> 2.39.2
>
