[RFC,0/3] mips: ralink: mt7621: fix too-early kzalloc

Message ID	20221103050538.1930758-1-git@johnthomson.fastmail.com.au (mailing list archive)
Headers	show Return-Path: <linux-mips-owner@kernel.org> Feedback-ID: ic081425d:Fastmail From: John Thomson <git@johnthomson.fastmail.com.au> To: Sergio Paracuellos <sergio.paracuellos@gmail.com>, =?utf-8?b?QXLEsW4=?= =?utf-8?b?w6cgw5xOQUw=?= <arinc.unal@arinc9.com>, John Crispin <john@phrozen.org>, Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH 0/3] mips: ralink: mt7621: fix too-early kzalloc Date: Thu, 3 Nov 2022 15:05:35 +1000 Message-Id: <20221103050538.1930758-1-git@johnthomson.fastmail.com.au> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	mips: ralink: mt7621: fix too-early kzalloc \| expand [RFC,0/3] mips: ralink: mt7621: fix too-early kzalloc [RFC,1/3] mips: ralink: mt7621: define MT7621_SYSC_BASE with __iomem [RFC,2/3] mips: ralink: mt7621: soc queries and tests as functions [RFC,3/3] mips: ralink: mt7621: do not use kzalloc too early

Message ID

20221103050538.1930758-1-git@johnthomson.fastmail.com.au (mailing list archive)

Headers

Feedback-ID: ic081425d:Fastmail
From: John Thomson <git@johnthomson.fastmail.com.au>
To: Sergio Paracuellos <sergio.paracuellos@gmail.com>, =?utf-8?b?QXLEsW4=?=
	=?utf-8?b?w6cgw5xOQUw=?= <arinc.unal@arinc9.com>,
 John Crispin <john@phrozen.org>,
 Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [RFC PATCH 0/3] mips: ralink: mt7621: fix too-early kzalloc
Date: Thu,  3 Nov 2022 15:05:35 +1000
Message-Id: <20221103050538.1930758-1-git@johnthomson.fastmail.com.au>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

Series

mips: ralink: mt7621: fix too-early kzalloc | expand

Message

John Thomson Nov. 3, 2022, 5:05 a.m. UTC

ralink mt7621 attempts to use kzalloc before normal memory management is
available.
Before v6.1-rc1, mt7621.c soc_dev_init silently failed to kzalloc and
returned in soc_dev_init, but continued to boot without the soc device
registered.
After, kernel crashes before it outputs any console messages

This was bisected to an mm/slub change (detailed in patch 3)

RFC due to
- probably a (much) better way to do this
- do not have mt7621 device with PCIe to test
  drivers/phy/ralink/phy-mt7621-pci.c
- should this reference a commit as Fixes?