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convert media_request_get_by_fd()

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the only thing done after fdput() (in failure cases) is a printk; safely
transposable with fdput()...

Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2024-06-09 23:07:41 -04:00
parent 00ec41ac16
commit 44b11a56c3
1 changed files with 6 additions and 12 deletions
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18
drivers/media/mc/mc-request.c
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@ -246,22 +246,21 @@ static const struct file_operations request_fops = {
struct media_request *
media_request_get_by_fd(struct media_device *mdev, int request_fd)
{
struct fd f;
struct media_request *req;
if (!mdev || !mdev->ops ||
!mdev->ops->req_validate || !mdev->ops->req_queue)
return ERR_PTR(-EBADR);
f = fdget(request_fd);
if (!fd_file(f))
goto err_no_req_fd;
CLASS(fd, f)(request_fd);
if (fd_empty(f))
goto err;
if (fd_file(f)->f_op != &request_fops)
goto err_fput;
goto err;
req = fd_file(f)->private_data;
if (req->mdev != mdev)
goto err_fput;
goto err;
/*
* Note: as long as someone has an open filehandle of the request,
@ -272,14 +271,9 @@ media_request_get_by_fd(struct media_device *mdev, int request_fd)
* before media_request_get() is called.
*/
media_request_get(req);
fdput(f);
return req;
err_fput:
fdput(f);
err_no_req_fd:
err:
dev_dbg(mdev->dev, "cannot find request_fd %d\n", request_fd);
return ERR_PTR(-EINVAL);
}