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SubjectRe: [PATCH] crypto: hisilicon - check if debugfs opened
On Sat, Mar 27, 2021 at 04:33:00PM +0800, Hui Tang wrote:
> 'xx_debugfs_init' check if debugfs opened.
>
> Signed-off-by: Hui Tang <tanghui20@huawei.com>
> ---
> drivers/crypto/hisilicon/hpre/hpre_main.c | 5 ++++-
> drivers/crypto/hisilicon/qm.c | 3 +++
> drivers/crypto/hisilicon/sec2/sec_main.c | 5 ++++-
> drivers/crypto/hisilicon/zip/zip_main.c | 3 +++
> 4 files changed, 14 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/crypto/hisilicon/hpre/hpre_main.c b/drivers/crypto/hisilicon/hpre/hpre_main.c
> index c7ab06d..f2605c4 100644
> --- a/drivers/crypto/hisilicon/hpre/hpre_main.c
> +++ b/drivers/crypto/hisilicon/hpre/hpre_main.c
> @@ -779,6 +779,9 @@ static int hpre_debugfs_init(struct hisi_qm *qm)
> struct device *dev = &qm->pdev->dev;
> int ret;
>
> + if (!debugfs_initialized())
> + return -ENOENT;

Why? What does this help with? Why does the code care if debugfs is
running or not?

thanks,

greg k-h

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