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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , linux-arm-msm@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] net: qrtr: fix handling of confirm_rx field Message-ID: References: <20260320-qrtr-fix-confirm_rx-on-big-endian-v1-1-e1a337dc1a38@westermo.com> <20260321101926.GY74886@horms.kernel.org> <20260323153254.GB112574@horms.kernel.org> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260323153254.GB112574@horms.kernel.org> User-Agent: Mutt/2.2.12 (2023-09-09) X-ClientProxiedBy: GVZP280CA0006.SWEP280.PROD.OUTLOOK.COM (2603:10a6:150:273::12) To DB9P192MB3090.EURP192.PROD.OUTLOOK.COM (2603:10a6:10:5e2::11) Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DB9P192MB3090:EE_|AM9P192MB0853:EE_ X-MS-Office365-Filtering-Correlation-Id: d6be9447-4aca-4b89-4691-08de8973bd39 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|7416014|376014|1800799024|18002099003|56012099003|22082099003; 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X-MS-Exchange-CrossPremises-SCL: 1 X-MS-Exchange-CrossPremises-Processed-By-Journaling: Journal Agent X-OrganizationHeadersPreserved: AM9P192MB0853.EURP192.PROD.OUTLOOK.COM X-Proofpoint-ORIG-GUID: jY3bpUzTMrVa9ykmPjF1ckKl1_xxq_Z7 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzI0MDA1NiBTYWx0ZWRfX64jgzpNsmV7t FaXGI+3GX4kmQHNpT/rg05rQ5Emjr9bH7UptPZEW+3PdqjR7nvw0LkMMQuA6qOpkw+M4if+s17G 5TNlcelCal/WlJYt9huSinP8PsI/eLjDdWGSMaTwjlQImfj/Awk5rjZvTpccWgFE5+fiU0EZSqJ rvRozLPEV6khM2FAT3lDyJsdclIhK0bT/Rmgqa3nfyFXAHCPqVjZOPIXhtqtlT0/GTqR5s50mwu kAod11kD1HzOZe9AsDcnzWUSROswb1WHCqJLk1waF5N0R5qSeEaVZJJkHorJobaepZHunbiog2w /pd7AzaoIKTo116lvrekXrwcrDMRSkeL7wT6lgJ9uZq4ZEOM8Zz6VQH06ajfwyHzZQGSRY5URBg wj7YBQLHUl1dUale0CUh1pN11ToECxwd/zYjRk1jSwcqTG/57y/tMbKlas6t9yDBBJF+nsXAPW8 u2OMkZMXxA1YhbSaDBQ== X-Authority-Analysis: v=2.4 cv=K9Iv3iWI c=1 sm=1 tr=0 ts=69c237be cx=c_pps a=de1FuetzK2QBuoS+fAXp0w==:117 a=6eWqkTHjU83fiwn7nKZWdM+Sl24=:19 a=z/mQ4Ysz8XfWz/Q5cLBRGdckG28=:19 a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19 a=xqWC_Br6kY4A:10 a=kj9zAlcOel0A:10 a=Yq5XynenixoA:10 a=8gLI3H-aZtYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=tr3XZvuDWTETL0Uaxejn:22 a=WQ4YJ39tjzx_Hbm9pN5v:22 a=FgcX-9L09ZoKcqbMxm8A:9 a=CjuIK1q_8ugA:10 X-Proofpoint-GUID: jY3bpUzTMrVa9ykmPjF1ckKl1_xxq_Z7 On Mon, Mar 23, 2026 at 03:32:54PM +0000, Simon Horman wrote: > On Mon, Mar 23, 2026 at 07:51:08AM +0100, Alexander Wilhelm wrote: > > On Sat, Mar 21, 2026 at 10:19:26AM +0000, Simon Horman wrote: > > > On Fri, Mar 20, 2026 at 02:28:52PM +0100, Alexander Wilhelm wrote: > > > > Convert confirm_rx to little endian when enqueueing by using cpu_to_le32(), > > > > as big endian systems otherwise interpret the value incorrectly. > > > > > > > > When receiving, apply le32_to_cpu(). !! ensures the result becomes 0 or 1 > > > > in native CPU endianness, so this conversion is not strictly required, but > > > > it is kept for consistency, clarity, and future safety. > > > > > > Hi Alexander, > > > > > > It seems to me that the conversion is required if the code > > > runs on a Big Endian host. What is your thinking on this? > > > > Hi Simon, > > > > Yes, that is correct. The patch fixes the control flow on Big Endian platforms > > only. It has no impact on Little Endian systems. > > Thanks Alexander, > > Please send a v2 with the commit message updated accordingly. > > As this is a fix, please base the patch on the net tree. > And target that tree like this: > > Subject: [PATCH v2 net] net: qrtr: fix handling of confirm_rx field > > Or perhaps, making the subject slightly more descriptive: > > Subject: [PATCH v2 net] net: qrtr: fix endian handling of confirm_rx field Sure, I will improve the commit description in version 2. Best regards Alexander Wilhelm