From: Jason Cooper <jason@lakedaemon.net>
To: Michal Simek <michal.simek@xilinx.com>
Cc: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>,
monstr@monstr.eu, ralf@linux-mips.org, tglx@linutronix.de,
marc.zyngier@arm.com, soren.brinkmann@xilinx.com,
linux-kernel@vger.kernel.org, linux-mips@linux-mips.org,
netdev@vger.kernel.org
Subject: Re: [Patch v4 01/12] microblaze: irqchip: Move intc driver to irqchip
Date: Fri, 2 Sep 2016 13:28:06 +0000 [thread overview]
Message-ID: <20160902132806.GK10637@io.lakedaemon.net> (raw)
In-Reply-To: <4931182d-7b30-582f-f291-5be59b6b89e4@xilinx.com>
Hi Michal, Zubair,
On Fri, Sep 02, 2016 at 12:27:54PM +0200, Michal Simek wrote:
> On 2.9.2016 12:06, Zubair Lutfullah Kakakhel wrote:
> > On 09/02/2016 07:25 AM, Michal Simek wrote:
...
> >> Also there is another copy of this driver in the tree which was using
> >> old ppc405 and ppc440 xilinx platforms.
> >>
> >> arch/powerpc/include/asm/xilinx_intc.h
> >> arch/powerpc/sysdev/xilinx_intc.c
> >>
> >> These should be also removed by moving this driver to generic folder.
> >
> > I didn't know about that drivers existence.
> >
> > This patch series already touches microblaze, mips and irqchip.
> > Both microblaze and mips platforms using this driver are little-endian.
>
> MB is big ending too and as you see there is big endian support in the
> driver already.
>
> >
> > Adding a big-endian powerpc driver + platform to the mix is going to
> > complicate the series further and make it super hard to synchronize
> > various subsystems, test stuff, and then move the drivers without
> > breakage.
The whole point of Linus' push to move drivers out of arch/ is to
reduce code duplication and create more robust drivers.
> > I'd highly recommend letting this move happen. And then the powerpc
> > driver can transition over time to this driver.
I've seen this argument before, and despite everyone's best intentions,
it never happens. :(
We have linux-next, 0-day and other resources to test these sorts of
changes and catch errors before they hit mainline.
Let's take our time and do it right.
thx,
Jason.
next prev parent reply other threads:[~2016-09-02 13:28 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-01 16:50 [Patch v4 00/12] microblaze/MIPS: xilfpga: intc and peripheral Zubair Lutfullah Kakakhel
2016-09-01 16:50 ` [Patch v4 01/12] microblaze: irqchip: Move intc driver to irqchip Zubair Lutfullah Kakakhel
2016-09-02 5:56 ` Michal Simek
2016-09-02 9:55 ` Zubair Lutfullah Kakakhel
2016-09-02 6:25 ` Michal Simek
2016-09-02 10:06 ` Zubair Lutfullah Kakakhel
2016-09-02 10:27 ` Michal Simek
2016-09-02 11:46 ` Zubair Lutfullah Kakakhel
2016-09-02 12:06 ` Michal Simek
2016-09-02 12:48 ` Jason Cooper
2016-09-02 13:28 ` Jason Cooper [this message]
2016-09-02 13:31 ` Marc Zyngier
2016-09-01 16:50 ` [Patch v4 02/12] irqchip: axi-intc: Clean up irqdomain argument and read/write Zubair Lutfullah Kakakhel
2016-09-01 17:15 ` Marc Zyngier
2016-09-02 10:47 ` Zubair Lutfullah Kakakhel
2016-09-02 1:25 ` kbuild test robot
2016-09-01 16:50 ` [Patch v4 03/12] irqchip: axi-intc: Rename get_irq to xintc_get_irq Zubair Lutfullah Kakakhel
2016-09-02 5:58 ` Michal Simek
2016-09-01 16:50 ` [Patch v4 04/12] irqchip: axi-intc: Add support for parent intc Zubair Lutfullah Kakakhel
2016-09-01 17:17 ` Marc Zyngier
2016-09-01 16:50 ` [Patch v4 05/12] MIPS: xilfpga: Use irqchip_init instead of the legacy way Zubair Lutfullah Kakakhel
2016-09-01 16:50 ` [Patch v4 06/12] MIPS: xilfpga: Use Xilinx AXI Interrupt Controller Zubair Lutfullah Kakakhel
2016-09-02 7:05 ` Michal Simek
2016-09-02 7:06 ` Michal Simek
2016-09-01 16:51 ` [Patch v4 07/12] MIPS: xilfpga: Update DT node and specify uart irq Zubair Lutfullah Kakakhel
2016-09-01 16:51 ` [Patch v4 08/12] MIPS: Xilfpga: Add DT node for AXI I2C Zubair Lutfullah Kakakhel
2016-09-01 16:51 ` [Patch v4 09/12] net: ethernet: xilinx: Generate random mac if none found Zubair Lutfullah Kakakhel
2016-09-02 7:08 ` Michal Simek
2016-09-01 16:51 ` [Patch v4 10/12] net: ethernet: xilinx: Enable emaclite for MIPS Zubair Lutfullah Kakakhel
2016-09-01 16:51 ` [Patch v4 11/12] MIPS: xilfpga: Add DT node for AXI emaclite Zubair Lutfullah Kakakhel
2016-09-01 16:51 ` [Patch v4 12/12] MIPS: xilfpga: Update defconfig Zubair Lutfullah Kakakhel
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