linux-kernel - Re: [PATCH 0/9] firewire: ohci: adoption of device managed resource

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Message-ID: <20230605225631.GB178739@workstation.local>
Date:   Tue, 6 Jun 2023 07:56:31 +0900
From:   Takashi Sakamoto <o-takashi@...amocchi.jp>
To:     linux1394-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/9] firewire: ohci: adoption of device managed resource

On Sun, Jun 04, 2023 at 02:44:42PM +0900, Takashi Sakamoto wrote:
> Hi,
> 
> Linux FireWire subsystem includes a driver (firewire-ohci) for 1394 OHCI
> controller. The code of driver is mostly written at the time when device
> managed resource (devres) was not widely used. Nowadays the usage of
> devres is standard when writing drivers. The series is an adoption of
> devres for firewire-ohci.
> 
> I note that MSI-related operation is left as is. The hardware vendors
> forms their products of extension card with 1394 OHCI controller
> connected to PCIe bus by several ways. If chip of 1394 OHCI controller has
> PCIe interface (e.g. VIA VT6315, LSI FW643), it is just connected to PCIe
> bus. If the chip has PCI interface only, it is connected to PCIe bus via
> PCI/PCIe bridge chip (e.g. VIA VT6307 + asmedia ASM1083). There is some
> chip of 1394 OHCI controller integrated with the bus bridge (e.g. TI
> XIO2213, XIO2221). The MSI-related operation should cover the above
> forms as well as module option, while it is still unclear that the
> operation from pci device driver to the bus bridge.
> 
> Takashi Sakamoto (9):
>   firewire: ohci: use devres for memory object of ohci structure
>   firewire: ohci: use devres for PCI-related resources
>   firewire: ohci: use devres for MMIO region mapping
>   firewire: ohci: use devres for misc DMA buffer
>   firewire: ohci: use devres for requested IRQ
>   firewire: ohci: use devres for list of isochronous contexts
>   firewire: ohci: use devres for IT, IR, AT/receive, and AT/request
>     contexts
>   firewire: ohci: use devres for content of configuration ROM
>   firewire: ohci: release buffer for AR req/resp contexts when managed
>     resource is released
> 
>  drivers/firewire/ohci.c | 174 +++++++++++++++-------------------------
>  1 file changed, 63 insertions(+), 111 deletions(-)

Applied to for-next branch.


Regards

Takashi Sakamoto