From patchwork Tue Mar 12 18:06:52 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Brandes, Shai" X-Patchwork-Id: 138263 X-Patchwork-Delegate: ferruh.yigit@amd.com Return-Path: X-Original-To: patchwork@inbox.dpdk.org Delivered-To: patchwork@inbox.dpdk.org Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 83B4F43C94; Tue, 12 Mar 2024 19:08:58 +0100 (CET) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 1131842E4B; Tue, 12 Mar 2024 19:08:05 +0100 (CET) Received: from smtp-fw-9102.amazon.com (smtp-fw-9102.amazon.com [207.171.184.29]) by mails.dpdk.org (Postfix) with ESMTP id 90BBF42E39 for ; Tue, 12 Mar 2024 19:08:01 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1710266882; x=1741802882; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=IQvW4xj8DNF7r0FHgl2JDDVH8pAvr3L07dm5PHpNFIs=; b=smaGpiinMB18vuJ9fxUl4SbfAKja7D1iEvcOXYm2zldaQpTjXhVBCMGp li8ym5I3GWSqaF+bIRjDDM4VUPn1BqdUb+wtZHRW+4T/AeeWRq4500wK+ hYyu28q1jX5upF+Nk8hQUwcGBMT1gbZsOg90I1g/xmerfgTdDiTD34NBS 4=; X-IronPort-AV: E=Sophos;i="6.07,119,1708387200"; d="scan'208";a="403403046" Received: from pdx4-co-svc-p1-lb2-vlan3.amazon.com (HELO smtpout.prod.us-east-1.prod.farcaster.email.amazon.dev) ([10.25.36.214]) by smtp-border-fw-9102.sea19.amazon.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Mar 2024 18:07:54 +0000 Received: from EX19MTAEUB001.ant.amazon.com [10.0.10.100:31306] by smtpin.naws.eu-west-1.prod.farcaster.email.amazon.dev [10.0.26.159:2525] with esmtp (Farcaster) id 4d13d162-1f38-4a91-a11b-f750322ffb65; Tue, 12 Mar 2024 18:07:40 +0000 (UTC) X-Farcaster-Flow-ID: 4d13d162-1f38-4a91-a11b-f750322ffb65 Received: from EX19D007EUA001.ant.amazon.com (10.252.50.133) by EX19MTAEUB001.ant.amazon.com (10.252.51.28) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1258.28; Tue, 12 Mar 2024 18:07:40 +0000 Received: from EX19MTAUWA001.ant.amazon.com (10.250.64.204) by EX19D007EUA001.ant.amazon.com (10.252.50.133) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1258.28; Tue, 12 Mar 2024 18:07:39 +0000 Received: from HFA15-CG15235BS.amazon.com (10.85.143.174) by mail-relay.amazon.com (10.250.64.204) with Microsoft SMTP Server id 15.2.1258.28 via Frontend Transport; Tue, 12 Mar 2024 18:07:38 +0000 From: To: CC: , Shai Brandes Subject: [PATCH v4 07/31] net/ena/base: limit exponential backoff exp Date: Tue, 12 Mar 2024 20:06:52 +0200 Message-ID: <20240312180716.8515-8-shaibran@amazon.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240312180716.8515-1-shaibran@amazon.com> References: <20240312180716.8515-1-shaibran@amazon.com> MIME-Version: 1.0 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org From: Shai Brandes Limit the value of the exponent used for this backoff at (1<<16) to prevent it from reaching to an excessive value (1<<32) or potentially even overflowing. In addition, for uniformity and readability purposes, the min/max parameter in the calls of ENA_MIN32 and ENA_MAX32 macros was changed to be first. Signed-off-by: Shai Brandes Reviewed-by: Amit Bernstein --- drivers/net/ena/base/ena_com.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/net/ena/base/ena_com.c b/drivers/net/ena/base/ena_com.c index 6953a1fa33..31c37b0ab3 100644 --- a/drivers/net/ena/base/ena_com.c +++ b/drivers/net/ena/base/ena_com.c @@ -34,6 +34,8 @@ #define ENA_REGS_ADMIN_INTR_MASK 1 +#define ENA_MAX_BACKOFF_DELAY_EXP 16U + #define ENA_MIN_ADMIN_POLL_US 100 #define ENA_MAX_ADMIN_POLL_US 5000 @@ -545,8 +547,9 @@ static int ena_com_comp_status_to_errno(struct ena_com_admin_queue *admin_queue, static void ena_delay_exponential_backoff_us(u32 exp, u32 delay_us) { + exp = ENA_MIN32(ENA_MAX_BACKOFF_DELAY_EXP, exp); delay_us = ENA_MAX32(ENA_MIN_ADMIN_POLL_US, delay_us); - delay_us = ENA_MIN32(delay_us * (1U << exp), ENA_MAX_ADMIN_POLL_US); + delay_us = ENA_MIN32(ENA_MAX_ADMIN_POLL_US, delay_us * (1U << exp)); ENA_USLEEP(delay_us); }