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Sun, 31 Mar 2019 16:25:05 +0000 Received: from BN6PR1801MB1859.namprd18.prod.outlook.com ([fe80::98a4:3008:ad01:4759]) by BN6PR1801MB1859.namprd18.prod.outlook.com ([fe80::98a4:3008:ad01:4759%3]) with mapi id 15.20.1750.017; Sun, 31 Mar 2019 16:25:05 +0000 From: Pavan Nikhilesh Bhagavatula To: Jerin Jacob Kollanukkaran , "thomas@monjalon.net" , "ferruh.yigit@intel.com" , "arybchenko@solarflare.com" , "stephen@networkplumber.org" CC: "dev@dpdk.org" , Pavan Nikhilesh Bhagavatula , "stable@dpdk.org" Thread-Topic: [dpdk-dev] [PATCH] ethdev: fix DMA zone reserve not honoring size Thread-Index: AQHU595MOajHoQkCVUWjgm4oLn5Ltg== Date: Sun, 31 Mar 2019 16:25:04 +0000 Message-ID: <20190331162437.13048-1-pbhagavatula@marvell.com> Accept-Language: en-IN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: SG2PR04CA0132.apcprd04.prod.outlook.com (2603:1096:3:16::16) To BN6PR1801MB1859.namprd18.prod.outlook.com (2603:10b6:405:66::35) x-ms-exchange-messagesentrepresentingtype: 1 x-mailer: git-send-email 2.21.0 x-originating-ip: [49.205.218.5] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: eb5477dc-75bd-465b-7ec1-08d6b5f56e75 x-microsoft-antispam: BCL:0; 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A:1; MX:1; received-spf: None (protection.outlook.com: marvell.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: jxIvuqg7LPo1lbg59nAO/M58tVNuh6K0PShHLnkgRkkR2cgb5aZ+ENFLU6QkWAQksZI0sEaI+Q0JPDJbXzC4jFfMJ1WpF1VZPnnROQ1xTaPo5ITTieXYp5Ol9gepOGukoF5Whd7B5BldyuXfSEiBfSTghBWSnkexl9dT31mJ7+yChThx+KRt1q63r7LdTd1lcQNn2ObJrY0VxUrYEk+kb2667EOIwLT1zCYsLp4+OLp1N3/ga77faTbdhumN5iu59aJgZ556JhatB1Ev8tIImRFlyJdrxIgNqXyg3f9DNnIx2jXaSL0MG/gy3iLTzZZcNMm6eh9jsN04CHuz0WqbyuYUhJ0ZbzF/6bh55R5WcaNcMikI4jS4tFQAtWPeNVJh02JKauPa9CfS8tGlM1nnlA/+NenS5+2V3SOQAkBfbNQ= Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: eb5477dc-75bd-465b-7ec1-08d6b5f56e75 X-MS-Exchange-CrossTenant-originalarrivaltime: 31 Mar 2019 16:25:04.9726 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 70e1fb47-1155-421d-87fc-2e58f638b6e0 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN6PR1801MB1810 X-OriginatorOrg: marvell.com X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-03-31_10:, , signatures=0 Subject: [dpdk-stable] [dpdk-dev] [PATCH] ethdev: fix DMA zone reserve not honoring size X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: stable-bounces@dpdk.org Sender: "stable" From: Pavan Nikhilesh The `rte_eth_dma_zone_reserve()` is generally used to create HW rings. In some scenarios when a driver needs to reconfigure the ring size since the named memzone already exists it returns the previous memzone without checking if a different sized ring is requested. Introduce a check to see if the ring size requested is different from the previously created memzone length. Fixes: 719dbebceb81 ("xen: allow determining DOM0 at runtime") Cc: stable@dpdk.org Signed-off-by: Pavan Nikhilesh --- lib/librte_ethdev/rte_ethdev.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.= c index 12b66b68c..4ae12e43b 100644 --- a/lib/librte_ethdev/rte_ethdev.c +++ b/lib/librte_ethdev/rte_ethdev.c @@ -3604,9 +3604,12 @@ rte_eth_dma_zone_reserve(const struct rte_eth_dev *d= ev, const char *ring_name, } =20 mz =3D rte_memzone_lookup(z_name); - if (mz) + if (mz && (mz->len =3D=3D size)) return mz; =20 + if (mz) + rte_memzone_free(mz); + return rte_memzone_reserve_aligned(z_name, size, socket_id, RTE_MEMZONE_IOVA_CONTIG, align); } --=20 2.21.0