From: "Marek Behún" <kabel@kernel.org>
To: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: "Gregory CLEMENT" <gregory.clement@bootlin.com>,
"Andrew Lunn" <andrew@lunn.ch>, "Arnd Bergmann" <arnd@arndb.de>,
soc@kernel.org, arm@kernel.org,
"Andy Shevchenko" <andy@kernel.org>,
"Hans de Goede" <hdegoede@redhat.com>,
"Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>
Subject: Re: [PATCH v2 03/17] firmware: turris-mox-rwtm: Use macro constant instead of hardcoded 4096
Date: Mon, 17 Jun 2024 12:57:58 +0200 [thread overview]
Message-ID: <20240617125758.05bd5208@dellmb> (raw)
In-Reply-To: <CAHp75VeRjddGOG72dkH7pvrebA2-BkzrEH2ZBk0s8Xtk-bD1ew@mail.gmail.com>
On Thu, 13 Jun 2024 19:51:56 +0200
Andy Shevchenko <andy.shevchenko@gmail.com> wrote:
> On Thu, Jun 13, 2024 at 6:10 PM Marek Behún <kabel@kernel.org> wrote:
> >
> > The 4096 bytes limit in mox_hwrng_read() is due to the DMA buffer being
> > allocated to one PAGE_SIZE bytes. Use new local macro constant
> > RWTM_DMA_BUFFER_SIZE at allocation time and when used in mox_hwrng_read().
>
> ...
>
> > +#define RWTM_DMA_BUFFER_SIZE PAGE_SIZE
>
> Is it guaranteed to work on any possible PAGE_SIZE settings? We have
> some architectures that may have it quite different to 4k. Even if
> this driver will never be run in such an environment, strictly
> speaking it might not be a good idea to replace 4096 with PAGE_SIZE.
It would work with 64K, but I will use SZ_4K from sizes.h.
> ...
>
> > + if (max > RWTM_DMA_BUFFER_SIZE)
> > + max = RWTM_DMA_BUFFER_SIZE;
>
> You probably want max() from minmax.c.
You mean min() :)
next prev parent reply other threads:[~2024-06-17 10:58 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-06-13 16:10 [PATCH v2 00/17] Updates for turris-mox-rwtm driver Marek Behún
2024-06-13 16:10 ` [PATCH v2 01/17] firmware: turris-mox-rwtm: Do not complete if there are no waiters Marek Behún
2024-06-13 16:10 ` [PATCH v2 02/17] firmware: turris-mox-rwtm: Fix checking return value of wait_for_completion_timeout() Marek Behún
2024-06-13 16:10 ` [PATCH v2 03/17] firmware: turris-mox-rwtm: Use macro constant instead of hardcoded 4096 Marek Behún
2024-06-13 16:15 ` Ilpo Järvinen
2024-06-13 17:51 ` Andy Shevchenko
2024-06-14 5:44 ` Arnd Bergmann
2024-06-17 10:57 ` Marek Behún [this message]
2024-06-17 11:01 ` Andy Shevchenko
2024-06-13 16:10 ` [PATCH v2 04/17] firmware: turris-mox-rwtm: Use ETH_ALEN instead of hardcoded 6 Marek Behún
2024-06-13 16:10 ` [PATCH v2 05/17] firmware: turris-mox-rwtm: Use the boolean type where appropriate Marek Behún
2024-06-13 16:10 ` [PATCH v2 06/17] firmware: turris-mox-rwtm: Hide signature related constants behind macros Marek Behún
2024-06-13 16:10 ` [PATCH v2 07/17] firmware: turris-mox-rwtm: Fix driver includes Marek Behún
2024-06-13 16:10 ` [PATCH v2 08/17] firmware: turris-mox-rwtm: Don't create own kobject type Marek Behún
2024-06-13 16:28 ` Ilpo Järvinen
2024-06-13 20:32 ` Andy Shevchenko
2024-06-14 5:58 ` Arnd Bergmann
2024-06-17 11:01 ` Marek Behún
2024-06-17 11:04 ` Marek Behún
2024-06-13 16:10 ` [PATCH v2 09/17] firmware: turris-mox-rwtm: Simplify debugfs code Marek Behún
2024-06-13 20:37 ` Andy Shevchenko
2024-06-17 11:10 ` Marek Behún
2024-06-13 16:10 ` [PATCH v2 10/17] firmware: turris-mox-rwtm: Convert rest to devm_* and get rid of driver .remove() Marek Behún
2024-06-13 20:39 ` Andy Shevchenko
2024-06-17 11:13 ` Marek Behún
2024-06-13 16:10 ` [PATCH v2 11/17] firmware: turris-mox-rwtm: Use dev_err_probe() where possible Marek Behún
2024-06-13 20:49 ` Andy Shevchenko
2024-06-17 11:14 ` Marek Behún
2024-06-17 12:26 ` Andy Shevchenko
2024-06-17 13:04 ` Marek Behún
2024-06-13 16:10 ` [PATCH v2 12/17] firmware: turris-mox-rwtm: Initialize completion before mailbox Marek Behún
2024-06-13 20:56 ` Andy Shevchenko
2024-06-13 16:10 ` [PATCH v2 13/17] firmware: turris-mox-rwtm: Drop redundant device pointer Marek Behún
2024-06-13 16:10 ` [PATCH v2 14/17] firmware: turris-mox-rwtm: Use devm_mutex_init() instead of mutex_init() Marek Behún
2024-06-13 16:10 ` [PATCH v2 15/17] firmware: turris-mox-rwtm: Use container_of() instead of hwrng .priv member Marek Behún
2024-06-13 16:10 ` [PATCH v2 16/17] firmware: turris-mox-rwtm: Use EOPNOTSUPP instead of ENOSYS Marek Behún
2024-06-13 16:10 ` [PATCH v2 17/17] firmware: turris-mox-rwtm: Deduplicate command execution code Marek Behún
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