linux-kernel - Re: [PATCH v5 3/3] scsi: qla2xxx: Use DEFINE_SHOW_STORE

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Date:   Mon, 4 Sep 2023 16:45:53 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     yangxingui <yangxingui@...wei.com>
Cc:     jejb@...ux.ibm.com, martin.petersen@...cle.com,
        john.g.garry@...cle.com, damien.lemoal@...nsource.wdc.com,
        akpm@...ux-foundation.org, viro@...iv.linux.org.uk,
        himanshu.madhani@...ium.com, felipe.balbi@...ux.intel.com,
        gregkh@...uxfoundation.org, uma.shankar@...el.com,
        anshuman.gupta@...el.com, animesh.manna@...el.com,
        linux-usb@...r.kernel.org, linux-scsi@...r.kernel.org,
        linux-kernel@...r.kernel.org, linuxarm@...wei.com,
        prime.zeng@...ilicon.com, kangfenglong@...wei.com,
        chenxiang66@...ilicon.com
Subject: Re: [PATCH v5 3/3] scsi: qla2xxx: Use DEFINE_SHOW_STORE_ATTRIBUTE
 helper for debugfs

On Mon, Sep 04, 2023 at 09:05:29PM +0800, yangxingui wrote:
> On 2023/9/4 18:56, Andy Shevchenko wrote:
> > On Mon, Sep 04, 2023 at 08:48:04AM +0000, Xingui Yang wrote:

...

> > > -/*
> > > - * Helper macros for setting up debugfs entries.
> > > - * _name: The name of the debugfs entry
> > > - * _ctx_struct: The context that was passed when creating the debugfs file
> > > - *
> > > - * QLA_DFS_SETUP_RD could be used when there is only a show function.
> > > - * - show function take the name qla_dfs_<sysfs-name>_show
> > > - *
> > > - * QLA_DFS_SETUP_RW could be used when there are both show and write functions.
> > > - * - show function take the name  qla_dfs_<sysfs-name>_show
> > > - * - write function take the name qla_dfs_<sysfs-name>_write
> > > - *
> > > - * To have a new debugfs entry, do:
> > > - * 1. Create a "struct dentry *" in the appropriate structure in the format
> > > - * dfs_<sysfs-name>
> > > - * 2. Setup debugfs entries using QLA_DFS_SETUP_RD / QLA_DFS_SETUP_RW
> > > - * 3. Create debugfs file in qla2x00_dfs_setup() using QLA_DFS_CREATE_FILE
> > > - * or QLA_DFS_ROOT_CREATE_FILE
> > > - * 4. Remove debugfs file in qla2x00_dfs_remove() using QLA_DFS_REMOVE_FILE
> > > - * or QLA_DFS_ROOT_REMOVE_FILE
> > > - *
> > > - * Example for creating "TEST" sysfs file:
> > > - * 1. struct qla_hw_data { ... struct dentry *dfs_TEST; }
> > > - * 2. QLA_DFS_SETUP_RD(TEST, scsi_qla_host_t);
> > > - * 3. In qla2x00_dfs_setup():
> > > - * QLA_DFS_CREATE_FILE(ha, TEST, 0600, ha->dfs_dir, vha);
> > > - * 4. In qla2x00_dfs_remove():
> > > - * QLA_DFS_REMOVE_FILE(ha, TEST);
> > > - */
> > 
> > I believe this comment (in some form) has to be preserved.
> > Try to rewrite it using reference to the new macro.
> Thanks for your reply, I checked and these macros aren't being called
> anywhere else, so I decided to delete them all. Of course, maybe this macro
> will be used in the future, and I can resubmit another version based on your
> suggestion.

Of course you need to rewrite it to use new approach.

-- 
With Best Regards,
Andy Shevchenko