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Wed, 18 Sep 2024 02:53:04 +0000 Received: from SEYPR06MB5672.apcprd06.prod.outlook.com ([fe80::2f0c:5cf2:abb0:d852]) by SEYPR06MB5672.apcprd06.prod.outlook.com ([fe80::2f0c:5cf2:abb0:d852%5]) with mapi id 15.20.7962.022; Wed, 18 Sep 2024 02:53:04 +0000 From: Huan Yang To: vivek.kasireddy@intel.com, Sumit Semwal , =?utf-8?q?Christian_K=C3=B6nig?= , Gerd Hoffmann , Dave Airlie , Andrew Morton , linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org Cc: opensource.kernel@vivo.com, Huan Yang Subject: [PATCH v7 5/7] udmabuf: introduce udmabuf init and deinit helper Date: Wed, 18 Sep 2024 10:52:28 +0800 Message-ID: <20240918025238.2957823-6-link@vivo.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240918025238.2957823-1-link@vivo.com> References: <20240918025238.2957823-1-link@vivo.com> X-ClientProxiedBy: SI2P153CA0014.APCP153.PROD.OUTLOOK.COM (2603:1096:4:140::6) To SEYPR06MB5672.apcprd06.prod.outlook.com (2603:1096:101:bc::11) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SEYPR06MB5672:EE_|KL1PR06MB6236:EE_ X-MS-Office365-Filtering-Correlation-Id: 9069a733-c9a9-406b-11ef-08dcd78d0482 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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The current array structure has already been greatly expanded. Also, before udmabuf needs to be kfree, the occupied resources need to be released. This part is repetitive and maybe overlooked. This patch give a helper function when init and deinit, by this, reduce duplicate code. Signed-off-by: Huan Yang Acked-by: Vivek Kasireddy --- drivers/dma-buf/udmabuf.c | 52 +++++++++++++++++++++++---------------- 1 file changed, 31 insertions(+), 21 deletions(-) diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c index 9d58c045b8eb..40ebff2c77f4 100644 --- a/drivers/dma-buf/udmabuf.c +++ b/drivers/dma-buf/udmabuf.c @@ -224,6 +224,28 @@ static int add_to_unpin_list(struct list_head *unpin_list, return 0; } +static __always_inline int init_udmabuf(struct udmabuf *ubuf, pgoff_t pgcnt) +{ + INIT_LIST_HEAD(&ubuf->unpin_list); + + ubuf->folios = kvmalloc_array(pgcnt, sizeof(*ubuf->folios), GFP_KERNEL); + if (!ubuf->folios) + return -ENOMEM; + + ubuf->offsets = kvcalloc(pgcnt, sizeof(*ubuf->offsets), GFP_KERNEL); + if (!ubuf->offsets) + return -ENOMEM; + + return 0; +} + +static __always_inline void deinit_udmabuf(struct udmabuf *ubuf) +{ + unpin_all_folios(&ubuf->unpin_list); + kvfree(ubuf->offsets); + kvfree(ubuf->folios); +} + static void release_udmabuf(struct dma_buf *buf) { struct udmabuf *ubuf = buf->priv; @@ -232,9 +254,7 @@ static void release_udmabuf(struct dma_buf *buf) if (ubuf->sg) put_sg_table(dev, ubuf->sg, DMA_BIDIRECTIONAL); - unpin_all_folios(&ubuf->unpin_list); - kvfree(ubuf->offsets); - kvfree(ubuf->folios); + deinit_udmabuf(ubuf); kfree(ubuf); } @@ -392,33 +412,24 @@ static long udmabuf_create(struct miscdevice *device, if (!ubuf) return -ENOMEM; - INIT_LIST_HEAD(&ubuf->unpin_list); pglimit = (size_limit_mb * 1024 * 1024) >> PAGE_SHIFT; for (i = 0; i < head->count; i++) { if (!PAGE_ALIGNED(list[i].offset)) - goto err; + goto err_noinit; if (!PAGE_ALIGNED(list[i].size)) - goto err; + goto err_noinit; pgcnt += list[i].size >> PAGE_SHIFT; if (pgcnt > pglimit) - goto err; + goto err_noinit; } if (!pgcnt) - goto err; + goto err_noinit; - ubuf->folios = kvmalloc_array(pgcnt, sizeof(*ubuf->folios), GFP_KERNEL); - if (!ubuf->folios) { - ret = -ENOMEM; + ret = init_udmabuf(ubuf, pgcnt); + if (ret) goto err; - } - - ubuf->offsets = kvcalloc(pgcnt, sizeof(*ubuf->offsets), GFP_KERNEL); - if (!ubuf->offsets) { - ret = -ENOMEM; - goto err; - } for (i = 0; i < head->count; i++) { struct file *memfd = fget(list[i].memfd); @@ -449,9 +460,8 @@ static long udmabuf_create(struct miscdevice *device, return ret; err: - unpin_all_folios(&ubuf->unpin_list); - kvfree(ubuf->offsets); - kvfree(ubuf->folios); + deinit_udmabuf(ubuf); +err_noinit: kfree(ubuf); return ret; }