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Subject: Re: [PATCH v2 2/3] floppy: add defines for sizes of cmd & reply
 buffers of floppy_raw_cmd
From:   Joe Perches <joe@perches.com>
To:     Denis Efremov <efremov@linux.com>, linux-block@vger.kernel.org
Cc:     Willy Tarreau <w@1wt.eu>, Christoph Hellwig <hch@infradead.org>,
        linux-kernel@vger.kernel.org
Date:   Sun, 26 Apr 2020 13:28:14 -0700
In-Reply-To: <20200426130728.63399-3-efremov@linux.com>
References: <20200426130728.63399-1-efremov@linux.com>
         <20200426130728.63399-3-efremov@linux.com>
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On Sun, 2020-04-26 at 16:07 +0300, Denis Efremov wrote:
> Use FD_RAW_CMD_SIZE, FD_RAW_REPLY_SIZE defines instead of magic numbers
> for cmd & reply buffers of struct floppy_raw_cmd. Remove local to
> floppy.c MAX_REPLIES define, as it is now FD_RAW_REPLY_SIZE.
> FD_RAW_CMD_FULLSIZE added as we allow command to also fill reply_count
> and reply fields.
[]
> diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
[]
> @@ -1847,7 +1846,7 @@ static void show_floppy(int fdc)
>  			output_log[(i + output_log_pos) % OLOGSIZE].jiffies);
>  	pr_info("last result at %lu\n", resultjiffies);
>  	pr_info("last redo_fd_request at %lu\n", lastredo);
> -	print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1,
> +	print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, FD_RAW_REPLY_SIZE, 1,
>  		       reply_buffer, resultsize, true);

FD_RAW_REPLY_SIZE happens to be 16, but it's misleading
to use it here.

This use of 16 is not for FD_RAW_REPLY_SIZE, but the
width of the line
being dumped, and this value must be
either 16 or 32.