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usb: gadget: functionfs: use dma_buf_unmap_attachment_unlocked() helper

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Replace the open-coded dma_resv_lock()/dma_resv_unlock() around
dma_buf_unmap_attachment() in ffs_dmabuf_release() with the
dma_buf_unmap_attachment_unlocked() helper.

This aligns FunctionFS DMABUF unmap handling with the standard
DMA-BUF API, avoids duplicating locking logic and eases future
maintenance. No functional change.

Reviewed-by: fanggeng <fanggeng@lixiang.com>
Signed-off-by: Liang Jie <liangjie@lixiang.com>
Link: https://patch.msgid.link/20251114084246.2064845-1-buaajxlj@163.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Liang Jie
2025-11-14 16:42:44 +08:00
committed by Greg Kroah-Hartman
parent 24b040fe50
commit 363eb9bfde
1 changed files with 1 additions and 3 deletions
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4
drivers/usb/gadget/function/f_fs.c
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@@ -1306,9 +1306,7 @@ static void ffs_dmabuf_release(struct kref *ref)
struct dma_buf *dmabuf = attach->dmabuf;
pr_vdebug("FFS DMABUF release\n");
dma_resv_lock(dmabuf->resv, NULL);
dma_buf_unmap_attachment(attach, priv->sgt, priv->dir);
dma_resv_unlock(dmabuf->resv);
dma_buf_unmap_attachment_unlocked(attach, priv->sgt, priv->dir);
dma_buf_detach(attach->dmabuf, attach);
dma_buf_put(dmabuf);