net/ena/base: simplify loop copying Rx descriptors

Checking for the cdesc not being NULL doesn't have any sense if the idx
argument is not 0, so it can be skipped, as the error won't be detected
anyway.

To simplify that, only the 'i' value is being verified and the code is
breaking from the infinite loop in case when all descriptors were copied
into the buffer.

Signed-off-by: Michal Krawczyk <mk@semihalf.com>
Reviewed-by: Igor Chauskin <igorch@amazon.com>
Reviewed-by: Guy Tzalik <gtzalik@amazon.com>
Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>

diff --git a/drivers/net/ena/base/ena_eth_com.c b/drivers/net/ena/base/ena_eth_com.c
index 766643f..a35d92f 100644 (file)
--- a/drivers/net/ena/base/ena_eth_com.c
+++ b/drivers/net/ena/base/ena_eth_com.c
@@ -557,10 +557,15 @@ int ena_com_rx_pkt(struct ena_com_io_cq *io_cq,
        ena_rx_ctx->pkt_offset = cdesc->offset;
 
        do {
-               ena_buf->len = cdesc->length;
-               ena_buf->req_id = cdesc->req_id;
-               ena_buf++;
-       } while ((++i < nb_hw_desc) && (cdesc = ena_com_rx_cdesc_idx_to_ptr(io_cq, cdesc_idx + i)));
+               ena_buf[i].len = cdesc->length;
+               ena_buf[i].req_id = cdesc->req_id;
+
+               if (++i >= nb_hw_desc)
+                       break;
+
+               cdesc = ena_com_rx_cdesc_idx_to_ptr(io_cq, cdesc_idx + i);
+
+       } while (1);
 
        /* Update SQ head ptr */
        io_sq->next_to_comp += nb_hw_desc;