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CO6PR18MB4484.namprd18.prod.outlook.com (2603:10b6:5:359::9) by BN9PR18MB4249.namprd18.prod.outlook.com (2603:10b6:408:11a::23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6043.38; Tue, 31 Jan 2023 08:23:26 +0000 Received: from CO6PR18MB4484.namprd18.prod.outlook.com ([fe80::8bf2:df15:70ef:88eb]) by CO6PR18MB4484.namprd18.prod.outlook.com ([fe80::8bf2:df15:70ef:88eb%9]) with mapi id 15.20.6043.038; Tue, 31 Jan 2023 08:23:26 +0000 From: Akhil Goyal To: Michael Baum , "dev@dpdk.org" CC: Matan Azrad , Ashish Gupta , Fan Zhang , Kai Ji , Thomas Monjalon , "fiona.trahe@intel.com" , "stable@dpdk.org" Subject: RE: [EXT] [PATCH] compressdev: fix end of comp PMD list macro conflict Thread-Topic: [EXT] [PATCH] compressdev: fix end of comp PMD list macro conflict Thread-Index: AQHZHeegumz1S9Msd0qrb9EMZiEDaK63hmLggADX2dA= Date: Tue, 31 Jan 2023 08:23:25 +0000 Message-ID: References: <20230101134720.1709991-1-michaelba@nvidia.com> In-Reply-To: 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dev-bounces@dpdk.org > Subject: RE: [EXT] [PATCH] compressdev: fix end of comp PMD list macro > conflict >=20 > > The "rte_compressdev_info_get()" function retrieves the contextual > > information of a device. > > The output structure "dev_info" contains a list of devices supported > > capabilities for each supported algorithm. > > > > In this function description, it says the element after the last valid > > element has op field set to "RTE_COMP_ALGO_LIST_END". > > On the other hand, when this function used by > > "rte_compressdev_capability_get()" function, it uses > > "RTE_COMP_ALGO_UNSPECIFIED" as end of list as same as the > > "RTE_COMP_END_OF_CAPABILITIES_LIST()". > > > > The mlx5 and qat PMDs use "RTE_COMP_ALGO_LIST_END" as the end of > > capabilities list. When "rte_compressdev_capability_get()" function is > > called with unsupported algorithm, it might read memory out of bound. > > > > This patch change the "rte_compressdev_info_get()" function description > > to say using "RTE_COMP_ALGO_UNSPECIFIED" as the end of capabilities > > list. > > In addition, it moves both mlx5 and qat PMDs to use > > "RTE_COMP_ALGO_UNSPECIFIED" through > > "RTE_COMP_END_OF_CAPABILITIES_LIST()" macro. > > > > Fixes: 5d432f364078 ("compressdev: add device capabilities") > > Fixes: 2d148597ce76 ("compress/qat: add gen-specific implementation") > > Fixes: 384bac8d6555 ("compress/mlx5: add supported capabilities") > > Cc: fiona.trahe@intel.com > > Cc: roy.fan.zhang@intel.com > > Cc: matan@nvidia.com > > Cc: stable@dpdk.org > > > > Signed-off-by: Michael Baum > > > > --- > > > > After this change, I'm not sure about the purpose of > > "RTE_COMP_ALGO_LIST_END". > > There is no any other use of it in DPDK code, and it isn't represent th= e > > number of algorithms supported by the API since the > > "RTE_COMP_ALGO_UNSPECIFIED" is part of the enum. > > > > Due to the compress API is experimental I think the > > "RTE_COMP_ALGO_LIST_END" can be removed. > > > +1 to remove the list end enums. This will also help in avoiding ABI brea= kage > When we make this lib as stable. Even RTE_COMP_HASH_ALGO_LIST_END can also be removed. It is not used anywhere.