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

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Message-ID: <607e3d8f-0216-127c-8f4f-6034b0d17c15@kernel.dk>
Date:   Thu, 19 May 2022 18:32:03 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     "Jason A. Donenfeld" <Jason@...c4.com>
Cc:     LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] random: convert to using fops->write_iter()

On 5/19/22 6:08 PM, Jason A. Donenfeld wrote:
> 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.

Good catch, yes let's make that a ssize_t instead. Can you do that while
testing/applying?

-- 
Jens Axboe