From 9d370c245fed8370bea35ea612320ea172cce489 Mon Sep 17 00:00:00 2001 From: Huan Yang Date: Wed, 18 Sep 2024 10:52:28 +0800 Subject: [PATCH] UPSTREAM: udmabuf: introduce udmabuf init and deinit helper After udmabuf is allocated, its resources need to be initialized, including various array structures. 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. Change-Id: Ie1d84abf42481869ceaf9efb3ce4dfa8983af884 Signed-off-by: Huan Yang Acked-by: Vivek Kasireddy Signed-off-by: Vivek Kasireddy Link: https://patchwork.freedesktop.org/patch/msgid/20240918025238.2957823-6-link@vivo.com (cherry picked from commit 5d8157961fd183ce2a9be1f4fd9c775ae9e94536) Bug: 389839576 Signed-off-by: T.J. Mercier --- 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 ce7b08f4723f..d29db37b19c6 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); } @@ -387,33 +407,24 @@ 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); @@ -460,9 +471,8 @@ out_unlock: return ret; err: - unpin_all_folios(&ubuf->unpin_list); - kvfree(ubuf->offsets); - kvfree(ubuf->folios); + deinit_udmabuf(ubuf); +err_noinit: kfree(ubuf); return ret; }