On Fri, Nov 12, 2021 at 12:54:00AM -0800, Aayush Agarwal wrote:
> When two cavium cards are inserted and on booting OS,
> nitrox_debugfs_init() is called twice and thus tries to create
> 'n5pf' directory twice inside '/'. This causes the 'File exists' error.
>
> This error was handled before
> 'commit 97a93b2b5839 ("crypto: cavium/nitrox - no need to check return
> value of debugfs_create functions")'
>
> This commit handles the error by redirecting the code by checking
> if 'n5pf' directory exists already using 'debugfs_lookup()' function.
>
> Tested-by: Evan Xuan <jian.xuan@xxxxxxxxxx>
> Signed-off-by: Aayush Agarwal <aayush.a.agarwal@xxxxxxxxxx>
> ---
> drivers/crypto/cavium/nitrox/nitrox_main.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/drivers/crypto/cavium/nitrox/nitrox_main.c b/drivers/crypto/cavium/nitrox/nitrox_main.c
> index 6c61817996a3..1eee05e30f05 100644
> --- a/drivers/crypto/cavium/nitrox/nitrox_main.c
> +++ b/drivers/crypto/cavium/nitrox/nitrox_main.c
> @@ -7,6 +7,7 @@
> #include <linux/mutex.h>
> #include <linux/pci.h>
> #include <linux/pci_ids.h>
> +#include <linux/debugfs.h>
>
> #include "nitrox_dev.h"
> #include "nitrox_common.h"
> @@ -479,6 +480,13 @@ static int nitrox_probe(struct pci_dev *pdev,
> if (err)
> goto pf_hw_fail;
>
> + struct dentry *check_dir = debugfs_lookup(KBUILD_MODNAME, NULL);
> +
> + if (check_dir != NULL) {
> + dput(check_dir);
> + goto pf_hw_fail;
Why is this a "failure"?
> + }
> +
> nitrox_debugfs_init(ndev);
Why not just put the "check" logic in this function instead?
You want to have per-device directories in debugfs for this device,
right? If so, then this function should handle that, not the
nitrox_probe() call.
thanks,
greg k-h
