Re: [Qemu-devel] [PATCH 2/3] rdma: qemu_rdma_post_send_control uses wrongly RDMA_WRID_MAX

["Michael R. Hines" <mrhines@linux.vnet.ibm.com>]

On 08/01/2013 11:56 PM, Isaku Yamahata wrote:
> RDMA_WRID_CONTROL should be used. And remove related work around.
>
> Cc: Michael R. Hines <mrhines@us.ibm.com>
> Signed-off-by: Isaku Yamahata <yamahata@private.email.ne.jp>
> ---
>   migration-rdma.c |   12 ++++++------
>   1 file changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/migration-rdma.c b/migration-rdma.c
> index edbae9f..67069d2 100644
> --- a/migration-rdma.c
> +++ b/migration-rdma.c
> @@ -322,7 +322,7 @@ typedef struct RDMAContext {
>       char *host;
>       int port;
>
> -    RDMAWorkRequestData wr_data[RDMA_WRID_MAX + 1];
> +    RDMAWorkRequestData wr_data[RDMA_WRID_MAX];
>
>       /*
>        * This is used by *_exchange_send() to figure out whether or not
> @@ -1397,7 +1397,7 @@ static int qemu_rdma_post_send_control(RDMAContext *rdma, uint8_t *buf,
>                                          RDMAControlHeader *head)
>   {
>       int ret = 0;
> -    RDMAWorkRequestData *wr = &rdma->wr_data[RDMA_WRID_MAX];
> +    RDMAWorkRequestData *wr = &rdma->wr_data[RDMA_WRID_CONTROL];
>       struct ibv_send_wr *bad_wr;
>       struct ibv_sge sge = {
>                              .addr = (uint64_t)(wr->control),
> @@ -2052,7 +2052,7 @@ static void qemu_rdma_cleanup(RDMAContext *rdma)
>       g_free(rdma->block);
>       rdma->block = NULL;
>
> -    for (idx = 0; idx <= RDMA_WRID_MAX; idx++) {
> +    for (idx = 0; idx < RDMA_WRID_MAX; idx++) {
>           if (rdma->wr_data[idx].control_mr) {
>               rdma->total_registrations--;
>               ibv_dereg_mr(rdma->wr_data[idx].control_mr);
> @@ -2134,7 +2134,7 @@ static int qemu_rdma_source_init(RDMAContext *rdma, Error **errp, bool pin_all)
>           goto err_rdma_source_init;
>       }
>
> -    for (idx = 0; idx <= RDMA_WRID_MAX; idx++) {
> +    for (idx = 0; idx < RDMA_WRID_MAX; idx++) {
>           ret = qemu_rdma_reg_control(rdma, idx);
>           if (ret) {
>               ERROR(temp, "rdma migration: error registering %d control!\n",
> @@ -2243,7 +2243,7 @@ static int qemu_rdma_dest_init(RDMAContext *rdma, Error **errp)
>       struct rdma_cm_id *listen_id;
>       char ip[40] = "unknown";
>
> -    for (idx = 0; idx <= RDMA_WRID_MAX; idx++) {
> +    for (idx = 0; idx < RDMA_WRID_MAX; idx++) {
>           rdma->wr_data[idx].control_len = 0;
>           rdma->wr_data[idx].control_curr = NULL;
>       }
> @@ -2696,7 +2696,7 @@ static int qemu_rdma_accept(RDMAContext *rdma)
>           goto err_rdma_dest_wait;
>       }
>
> -    for (idx = 0; idx <= RDMA_WRID_MAX; idx++) {
> +    for (idx = 0; idx < RDMA_WRID_MAX; idx++) {
>           ret = qemu_rdma_reg_control(rdma, idx);
>           if (ret) {
>               fprintf(stderr, "rdma: error registering %d control!\n", idx);

Good eyes ...... I totally missed that =)

Reviewed-by: Michael R. Hines <mrhines@us.ibm.com>