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From: "Marek Behún" <kabel@kernel.org>
To: Christoph Hellwig <hch@lst.de>, Arnd Bergmann <arnd@kernel.org>,
	Andre Przywara <andre.przywara@arm.com>,
	Marc Zyngier <maz@kernel.org>,
	Linus Torvalds <torvalds@linux-foundation.org>
Cc: Russell King <linux@armlinux.org.uk>,
	Andrew Lunn <andrew@lunn.ch>,
	Gregory Clement <gregory.clement@bootlin.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Robin Murphy <robin.murphy@arm.com>,
	iommu@lists.linux-foundation.org,
	linux-arm-kernel@lists.infradead.org
Subject: REGRESSION in 6.0-rc7 caused by patch "ARM/dma-mapping: use dma-direct unconditionally"
Date: Fri, 30 Sep 2022 15:10:28 +0200	[thread overview]
Message-ID: <20220930151028.0e518421@dellmb> (raw)

Hello Linus, Arnd, Robin and Christoph,

I just bisected a regression on Turris Omnia (Armada 385), wherein the
system hangs shortly after init is run, to commit

  ae626eb97376 ("ARM/dma-mapping: use dma-direct unconditionally")
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ae626eb97376

In order to fix the regression, I had to revert this commit and
subsequent 3 commits:
  ae626eb97376 ("ARM/dma-mapping: use dma-direct unconditionally")
  42998ef08aba ("ARM/dma-mapping: drop .dma_supported for IOMMU ops")
  d563bccfa35b ("ARM/dma-mapping: consolidate IOMMU ops callbacks")
  4136ce90f079 ("ARM/dma-mapping: merge IOMMU ops")
in reverse order, of course:
  git revert 4136ce90f079
  git revert d563bccfa35b
  git revert 42998ef08aba
  git revert ae626eb97376

Christoph, Robin, since you are the authors of these commits, do you
have any idea what could be happening? Are we able to fix this without
reverting those commits, before 6.0?

Marek

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             reply	other threads:[~2022-09-30 13:11 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-30 13:10 Marek Behún [this message]
2022-09-30 13:46 ` REGRESSION in 6.0-rc7 caused by patch "ARM/dma-mapping: use dma-direct unconditionally" Robin Murphy
2022-09-30 14:52   ` Marek Behún
2022-09-30 15:02     ` Marek Behún
2022-09-30 16:41       ` Robin Murphy
2022-09-30 18:02         ` Marek Behún
2022-10-03  7:21           ` Christoph Hellwig
2022-10-03  7:30       ` Christoph Hellwig
2022-10-03 14:11         ` Russell King (Oracle)
2022-10-03 15:25           ` Marek Behún
2022-10-03 16:09             ` Pali Rohár
2022-10-03 19:04               ` Marek Behún
2022-10-03 19:08                 ` Pali Rohár
2022-10-03 21:30             ` Marcin Wojtas
2022-10-03 21:35               ` Pali Rohár
2022-10-03 22:03                 ` Marcin Wojtas
2022-10-04  7:10               ` Christoph Hellwig
2022-10-04  8:15                 ` Marek Behún
2022-10-04  8:17                   ` [PATCH] ARM: mvebu: select OF_DMA_DEFAULT_COHERENT if MACH_MVEBU_V7 Marek Behún
2022-10-04  8:30                     ` Christoph Hellwig
2022-10-04 12:54                       ` Marek Behún
2022-10-04  8:30                     ` Arnd Bergmann
2022-10-04  9:14                     ` Thorsten Leemhuis
2022-10-04  9:22                       ` Russell King (Oracle)
2022-10-04  9:56                 ` REGRESSION in 6.0-rc7 caused by patch "ARM/dma-mapping: use dma-direct unconditionally" Robin Murphy
2022-10-04  7:25               ` Russell King (Oracle)
2022-10-04  8:30                 ` Marcin Wojtas
2022-10-04  9:08                   ` Russell King (Oracle)
2022-10-04 12:36                     ` Marek Behún
2022-10-04 12:59                       ` Marcin Wojtas
2022-10-04 18:51                         ` Pali Rohár
2022-10-04 19:35                           ` Marcin Wojtas
2022-10-04  8:26               ` Marek Behún
2022-10-04  8:36                 ` Marcin Wojtas
2022-10-20 18:22                   ` Russell King (Oracle)
2022-10-20 19:10                     ` Marek Behún
2022-10-21 16:25                     ` Linus Torvalds
2022-10-21 16:30                     ` Christoph Hellwig
2022-10-21 18:21                       ` Russell King (Oracle)
2022-10-23 11:58                     ` Klaus Kudielka
2022-10-03 18:57         ` Marek Behún
2022-10-01  9:31 ` Thorsten Leemhuis
2022-11-04 12:08   ` REGRESSION in 6.0-rc7 caused by patch "ARM/dma-mapping: use dma-direct unconditionally" #forregzbot Thorsten Leemhuis

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