linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: "Maciej W. Rozycki" <macro@orcam.me.uk>
To: Christoph Hellwig <hch@lst.de>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org,
	iommu@lists.linux-foundation.org
Subject: Re: [PATCH 5/6] driver core: lift dma_default_coherent into common code
Date: Sun, 21 Feb 2021 04:32:38 +0100 (CET)	[thread overview]
Message-ID: <alpine.DEB.2.21.2102210407090.2021@angie.orcam.me.uk> (raw)
In-Reply-To: <alpine.DEB.2.21.2102151342050.1521@angie.orcam.me.uk>

On Mon, 15 Feb 2021, Maciej W. Rozycki wrote:

>  I hope to have the adapter properly fixed soon and I'll look at the Malta 
> side now, possibly using the old server whose DEFPA has worked flawlessly 
> for some 20 years now.  I have planned to use the interface to supply NFS 
> root, which I think should be enough of a stress test.

 Card reworked now and network wired, so using the new server actually.  
I haven't booted Linux on my Malta for a while now, but it turns out to 
work just fine, and your patch set does not regress it booting multi-user 
NFS-rooted over FDDI.

 I note however that the system does not reboot properly:

sd 0:0:0:0: [sda] Synchronizing SCSI cache
reboot: Restarting system
Reboot failed -- System halted

which is a regression, and also the MMIO-mapped discrete CBUS UART (ttyS2) 
does not sign in anymore either:

Serial: 8250/16550 driver, 5 ports, IRQ sharing enabled
printk: console [ttyS0] disabled
serial8250.0: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
printk: console [ttyS0] enabled
printk: console [ttyS0] enabled
printk: bootconsole [uart8250] disabled
printk: bootconsole [uart8250] disabled
serial8250.0: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A

while long ago:

Serial driver version 5.05c (2001-07-08) with MANY_PORTS SHARE_IRQ SERIAL_PCI enabled
ttyS28 at 0x03f8 (irq = 4) is a 16550A
ttyS29 at 0x02f8 (irq = 3) is a 16550A
ttyS30 at 0x0000 (irq = 20) is a 16550

(I don't know why the line numbers reported were so odd back then, but the 
standard character device major:minor numbers for ttyS0-2 just worked), so 
there's probably something wrong with platform device registration.  ISTR 
using the CBUS UART as a console device at one point too.

  Maciej

  reply	other threads:[~2021-02-21  3:34 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-08 14:50 MIPS noncoherent DMA cleanups Christoph Hellwig
2021-02-08 14:50 ` [PATCH 1/6] MIPS/malta: simplify plat_setup_iocoherency Christoph Hellwig
2021-02-08 14:50 ` [PATCH 2/6] MIPS/alchemy: factor out the DMA coherent setup Christoph Hellwig
2021-02-08 14:50 ` [PATCH 3/6] MIPS: move the {no,}nocoherentio options to the malta setup code Christoph Hellwig
2021-02-08 14:50 ` [PATCH 4/6] MIPS: refactor the maybe coherent DMA indicators Christoph Hellwig
2021-02-09 13:12   ` Thomas Bogendoerfer
2021-02-10  8:57     ` Christoph Hellwig
2021-02-08 14:50 ` [PATCH 5/6] driver core: lift dma_default_coherent into common code Christoph Hellwig
2021-02-08 15:00   ` Greg Kroah-Hartman
2021-02-08 15:57   ` Maciej W. Rozycki
2021-02-08 16:10     ` Christoph Hellwig
2021-02-09 11:23       ` Maciej W. Rozycki
2021-02-15 13:13         ` Maciej W. Rozycki
2021-02-21  3:32           ` Maciej W. Rozycki [this message]
2021-02-22  7:59             ` Christoph Hellwig
2021-02-22 10:42               ` Maciej W. Rozycki
2021-02-27 18:33                 ` Maciej W. Rozycki
2021-02-09 13:06   ` Thomas Bogendoerfer
2021-02-08 14:50 ` [PATCH 6/6] MIPS: remove CONFIG_DMA_PERDEV_COHERENT Christoph Hellwig
2021-02-09  1:36   ` Huacai Chen

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=alpine.DEB.2.21.2102210407090.2021@angie.orcam.me.uk \
    --to=macro@orcam.me.uk \
    --cc=gregkh@linuxfoundation.org \
    --cc=hch@lst.de \
    --cc=iommu@lists.linux-foundation.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mips@vger.kernel.org \
    --cc=tsbogend@alpha.franken.de \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).