linux-kernel - Re: [PATCH] random: convert to using fops->write

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Message-ID: <Yobb79PvIqRRNguV@zx2c4.com>
Date:   Fri, 20 May 2022 02:08:15 +0200
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] random: convert to using fops->write_iter()

Hi Jens,

On Thu, May 19, 2022 at 05:43:15PM -0600, Jens Axboe wrote:
> -static int write_pool(const char __user *ubuf, size_t len)
> +static size_t write_pool(struct iov_iter *iter)
>  {
>  	size_t block_len;
>  	int ret = 0;

Changing the return value to size_t isn't quite right, as this can
return -EFAULT. So at the very minimum, it should return a ssize_t.

Jason