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Message-ID: <ZLJ5ccZcmo/ol/Dm@corigine.com>
Date: Sat, 15 Jul 2023 11:48:17 +0100
From: Simon Horman <simon.horman@...igine.com>
To: Minjie Du <duminjie@...o.com>
Cc: Marcin Wojtas <mw@...ihalf.com>,
Russell King <linux@...linux.org.uk>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
"open list:MARVELL MVPP2 ETHERNET DRIVER" <netdev@...r.kernel.org>,
open list <linux-kernel@...r.kernel.org>,
opensource.kernel@...o.com
Subject: Re: [PATCH v1] drivers/net: marvell: mvpp2: fix debugfs_create_dir()
return check in three functions
On Thu, Jul 13, 2023 at 12:45:07PM +0800, Minjie Du wrote:
> Make IS_ERR() judge the debugfs_create_dir() function return
> in mvpp2_dbgfs_c2_entry_init(), mvpp2_dbgfs_flow_tbl_entry_init()
> and mvpp2_dbgfs_cls_init()
> Line 562 deletes the space because checkpatch reports an error.
>
> Signed-off-by: Minjie Du <duminjie@...o.com>
> ---
> drivers/net/ethernet/marvell/mvpp2/mvpp2_debugfs.c | 12 ++++++------
> 1 file changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_debugfs.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_debugfs.c
> index 75e83ea2a..37bff3304 100644
> --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_debugfs.c
> +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_debugfs.c
> @@ -559,7 +559,7 @@ static int mvpp2_dbgfs_prs_entry_init(struct dentry *parent,
> &mvpp2_dbgfs_prs_hits_fops);
>
> debugfs_create_file("pmap", 0444, prs_entry_dir, entry,
> - &mvpp2_dbgfs_prs_pmap_fops);
> + &mvpp2_dbgfs_prs_pmap_fops);
Unfortunately net-next does not accept patches for Checkpatch warnings
of this nature.
>
> return 0;
> }
> @@ -593,7 +593,7 @@ static int mvpp2_dbgfs_c2_entry_init(struct dentry *parent,
> sprintf(c2_entry_name, "%03d", id);
>
> c2_entry_dir = debugfs_create_dir(c2_entry_name, parent);
> - if (!c2_entry_dir)
> + if (IS_ERR(c2_entry_dir))
> return -ENOMEM;
As per the comment above debugfs_create_dir(), it is not
expected to return an error, and in general callers should
ignore the return value.
I expect a good approach here is to simply remove the error handling
for debugfs_create_dir(). e.g.
- if (!c2_entry_dir)
- return -ENOMEM;
--
pw-bot: changes-requested
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