linux-kernel - Re: [PATCH 1/4] soc: fsl: qbman: FSL_DPAA depends on COMPILE

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Message-ID: <20240709135811.c7tqh3ocfumg6ctt@skbuf>
Date: Tue, 9 Jul 2024 16:58:11 +0300
From: Vladimir Oltean <olteanv@...il.com>
To: Breno Leitao <leitao@...ian.org>
Cc: kernel test robot <lkp@...el.com>, linuxppc-dev@...ts.ozlabs.org,
	linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org,
	llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	kuba@...nel.org, horms@...nel.org, Roy.Pledge@....com,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/4] soc: fsl: qbman: FSL_DPAA depends on COMPILE_TEST

Hi Breno,

On Mon, Jul 08, 2024 at 12:08:05PM -0700, Breno Leitao wrote:
> I thought about a patch like the following (compile tested only). What
> do you think?

To be honest, there are several things I don't really like about this
patch.

- I really struggled with applying it in the current format. Could you
  please post the output of git format-patch in the future?
- You addressed dpaa_set_coalesce() but not also dpaa_fq_setup()
- You misrepresented the patch content by saying you only allocate size
  for online CPUs in the commit message. But you allocate for all
  possible CPUs.
- You only kfree(needs_revert) in the error (revert_values) case, but
  not in the normal (return 0) case.
- The netdev coding style is to sort the lines with variable
  declarations in reverse order of line length (they call this "reverse
  Christmas tree"). Your patch broke that order.
- You should use kcalloc() instead of kmalloc_array() + memset()

I have prepared and tested the attached alternative patch on a board and
I am preparing to submit it myself, if you don't have any objection.

Thanks,
Vladimir

View attachment "0001-net-dpaa-avoid-on-stack-arrays-of-NR_CPUS-elements.patch" of type "text/x-diff" (4201 bytes)