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From: Michal Krawczyk <mk@semihalf.com>
To: dev@dpdk.org
Cc: gtzalik@amazon.com, igorch@amazon.com,
	Michal Krawczyk <mk@semihalf.com>,
	Marcin Wojtas <mw@semihalf.com>,
	Evgeny Schemeilin <evgenys@amazon.com>
Subject: [dpdk-dev] [PATCH 17/20] net/ena/base: simplify loop copying Rx descs
Date: Thu, 17 Sep 2020 07:30:32 +0200
Message-ID: <20200917053035.1889989-18-mk@semihalf.com> (raw)
In-Reply-To: <20200917053035.1889989-1-mk@semihalf.com>

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>
---
 drivers/net/ena/base/ena_eth_com.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ena/base/ena_eth_com.c b/drivers/net/ena/base/ena_eth_com.c
index 766643f47b..a35d92fbd3 100644
--- 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;
-- 
2.25.1


  parent reply	other threads:[~2020-09-17  5:33 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-17  5:30 [dpdk-dev] [PATCH 00/20] Upgrade HAL and add ENI metrics support Michal Krawczyk
2020-09-17  5:30 ` [dpdk-dev] [PATCH 01/20] net/ena/base: use min/max macros with type conversion Michal Krawczyk
2020-09-17  5:30 ` [dpdk-dev] [PATCH 02/20] net/ena/base: specify operations of rte_delay Michal Krawczyk
2020-09-17  5:30 ` [dpdk-dev] [PATCH 03/20] net/ena/base: support 'resource busy' admin status Michal Krawczyk
2020-09-17  5:30 ` [dpdk-dev] [PATCH 04/20] net/ena/base: exponential delay in polling functions Michal Krawczyk
2020-09-17  5:30 ` [dpdk-dev] [PATCH 05/20] net/ena/base: fix release of wait event Michal Krawczyk
2020-09-17  5:30 ` [dpdk-dev] [PATCH 06/20] net/ena/base: remove MMIOWB_NOT_DEFINED ifdef Michal Krawczyk
2020-09-17  5:30 ` [dpdk-dev] [PATCH 07/20] net/ena/base: rework setup of accelerated LLQ mode Michal Krawczyk
2020-09-17  5:30 ` [dpdk-dev] [PATCH 08/20] net/ena/base: add ENI stats Michal Krawczyk
2020-09-17  5:30 ` [dpdk-dev] [PATCH 09/20] net/ena/base: split RSS function and hash getters Michal Krawczyk
2020-09-17  5:30 ` [dpdk-dev] [PATCH 10/20] net/ena/base: do not use hardcoded RSS key buffer size Michal Krawczyk
2020-09-17  5:30 ` [dpdk-dev] [PATCH 11/20] net/ena/base: check for RSS key configuration support Michal Krawczyk
2020-09-17  5:30 ` [dpdk-dev] [PATCH 12/20] net/ena/base: minor style adjustments Michal Krawczyk
2020-09-17  5:30 ` [dpdk-dev] [PATCH 13/20] net/ena/base: add missing unlikely Michal Krawczyk
2020-09-17  5:30 ` [dpdk-dev] [PATCH 14/20] net/ena/base: store admin stats as u64 Michal Krawczyk
2020-09-17  5:30 ` [dpdk-dev] [PATCH 15/20] net/ena/base: add check for meta desc being NULL Michal Krawczyk
2020-09-17  5:30 ` [dpdk-dev] [PATCH 16/20] net/ena/base: convert values to u32 before shifting Michal Krawczyk
2020-09-17  5:30 ` Michal Krawczyk [this message]
2020-09-17  5:30 ` [dpdk-dev] [PATCH 18/20] net/ena/base: update generation date and commit Michal Krawczyk
2020-09-17  5:30 ` [dpdk-dev] [PATCH 19/20] net/ena: lock dynamic usages of the admin queue Michal Krawczyk
2020-09-17  5:30 ` [dpdk-dev] [PATCH 20/20] net/ena: expose ENI stats as additional xstats Michal Krawczyk
2020-09-17 17:02 ` [dpdk-dev] [PATCH 00/20] Upgrade HAL and add ENI metrics support Stephen Hemminger
2020-09-22 12:24   ` Ferruh Yigit

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