From: Umang Jain <umang.jain@ideasonboard.com>
To: Arnd Bergmann <arnd@arndb.de>,
Florian Fainelli <florian.fainelli@broadcom.com>,
Broadcom internal kernel review list
<bcm-kernel-feedback-list@broadcom.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-rpi-kernel@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org,
Dan Carpenter <dan.carpenter@linaro.org>,
"laurent.pinchart" <laurent.pinchart@ideasonboard.com>,
Kieran Bingham <kieran.bingham@ideasonboard.com>,
Stefan Wahren <wahrenst@gmx.net>,
Dave Stevenson <dave.stevenson@raspberrypi.com>,
Phil Elwell <phil@raspberrypi.com>
Subject: Re: [PATCH 4/7] staging: vchiq_core: Factor out bulk transfer for (no/)callback mode
Date: Sat, 31 Aug 2024 20:35:04 +0530 [thread overview]
Message-ID: <b0e51146-6f6c-46d7-bfea-277092cfbd7b@ideasonboard.com> (raw)
In-Reply-To: <08aa277d-a966-4785-921e-6a63a2e5922b@app.fastmail.com>
Hi Arnd
On 23/08/24 9:11 pm, Arnd Bergmann wrote:
> On Fri, Aug 23, 2024, at 15:14, Umang Jain wrote:
>
>> +int
>> +bulk_xfer_callback_interruptible(struct vchiq_instance *instance,
>> unsigned int handle,
>> + void *offset, void __user *uoffset, int size,
>> + enum vchiq_bulk_mode mode, void *userdata,
>> + enum vchiq_bulk_dir dir)
> It seems you can also tighten the argument types here a bit more:
>
> - uoffset is always NULL and can be left out
Not true.
in vchiq_dev.c. it is not NULL
This should ideally be split off even more, for in-kernel usage (using
the kernel pointers only) and for ioctl interface (that uses __user pointer)
> - userdata is either NULL or a struct mmal_msg_context, so you can use
> that type directly.
It can be NULL, struct mmal_msg_context or a integer pointer - if coming
through ioctl interface (vchiq_dev.c)
(Checked via checking vchiq_test code)
>
> Arnd
next prev parent reply other threads:[~2024-08-31 15:05 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-23 15:14 [PATCH 0/7] staging: vchiq_core: Refactor vchiq_bulk_transfer() logic Umang Jain
2024-08-23 15:14 ` [PATCH 1/7] staging: vchiq: Factor out bulk transfer for VCHIQ_BULK_MODE_WAITING Umang Jain
2024-08-23 15:23 ` Arnd Bergmann
2024-08-23 21:28 ` Stefan Wahren
2024-08-23 15:14 ` [PATCH 2/7] staging: vchiq_core: Simplify vchiq_bulk_transfer() Umang Jain
2024-08-23 15:14 ` [PATCH 3/7] staging: vchiq_core: Factor out bulk transfer for blocking mode Umang Jain
2024-08-23 21:36 ` Stefan Wahren
2024-08-23 15:14 ` [PATCH 4/7] staging: vchiq_core: Factor out bulk transfer for (no/)callback mode Umang Jain
2024-08-23 15:33 ` Laurent Pinchart
2024-08-23 15:41 ` Arnd Bergmann
2024-08-31 15:05 ` Umang Jain [this message]
2024-08-23 15:14 ` [PATCH 5/7] staging: vchiq_core: Drop vchiq_bulk_transfer() Umang Jain
2024-08-23 15:14 ` [PATCH 6/7] staging: vchiq_core: Remove unused function argument Umang Jain
2024-08-23 21:47 ` Stefan Wahren
2024-08-23 15:14 ` [PATCH 7/7] staging: vchiq_core: Pass enumerated flag instead of int Umang Jain
2024-08-23 21:50 ` Stefan Wahren
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