From: Frank Wunderlich <frank-w@public-files.de>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Ryder Lee <ryder.lee@mediatek.com>, Marc Zyngier <maz@kernel.org>,
linux-kernel@vger.kernel.org, Bjorn Helgaas <bhelgaas@google.com>,
linux-mediatek@lists.infradead.org, linux-pci@vger.kernel.org,
Matthias Brugger <matthias.bgg@gmail.com>,
Frank Wunderlich <linux@fw-web.de>
Subject: Aw: Re: Re: [PATCH] pci: mediatek: fix warning in msi.h
Date: Wed, 4 Nov 2020 17:49:31 +0100 [thread overview]
Message-ID: <trinity-1d7f8900-10db-40c0-a0aa-47bb99ed84cd-1604508571909@3c-app-gmx-bs02> (raw)
In-Reply-To: <87o8ke7njb.fsf@nanos.tec.linutronix.de>
> Gesendet: Dienstag, 03. November 2020 um 11:16 Uhr
> Von: "Thomas Gleixner" <tglx@linutronix.de>
> Any architecture which selects PCI_MSI_ARCH_FALLBACKS and does not have
> irqdomain support runs into:
>
> if (!d)
> bus->bus_flags |= PCI_BUS_FLAGS_NO_MSI;
>
> which in turn makes pci_msi_supported() return 0 and consequently makes
> pci_enable_msi[x]() fail.
i'm not that deep into this, but just my thoughts...you are the experts :)
checking for PCI_MSI_ARCH_FALLBACKS here does not help?
something like this:
#ifndef PCI_MSI_ARCH_FALLBACKS
if (!d)
bus->bus_flags |= PCI_BUS_FLAGS_NO_MSI;
#endif
imho pci_enable_msi[x]() does not do anything if there is no msi-support (or does not get called), so maybe check the PCI_BUS_FLAGS_NO_MSI before the call (if this is inside core) or inside the enable-function (if called from outside)....
or is this the issue marc talkes about (called before flag is set)?
regards Frank
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next prev parent reply other threads:[~2020-11-04 16:49 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-31 14:03 [PATCH] pci: mediatek: fix warning in msi.h Frank Wunderlich
2020-10-31 21:49 ` Thomas Gleixner
2020-11-01 9:25 ` Frank Wunderlich
2020-11-01 11:17 ` Thomas Gleixner
2020-11-01 11:43 ` Marc Zyngier
2020-11-01 15:58 ` Aw: " Frank Wunderlich
2020-11-01 17:54 ` Ryder Lee
2020-11-01 18:27 ` Aw: " Frank Wunderlich
2020-11-01 21:47 ` Marc Zyngier
2020-11-01 22:27 ` Thomas Gleixner
2020-11-02 11:30 ` Marc Zyngier
2020-11-02 11:56 ` Aw: " Frank Wunderlich
2020-11-02 13:58 ` Marc Zyngier
2020-11-02 14:27 ` Aw: " Frank Wunderlich
2020-11-02 16:16 ` Aw: " Thomas Gleixner
2020-11-02 22:18 ` Thomas Gleixner
2020-11-03 9:54 ` Marc Zyngier
2020-11-03 10:16 ` Thomas Gleixner
2020-11-03 10:29 ` Marc Zyngier
2020-11-04 16:49 ` Frank Wunderlich [this message]
2020-11-04 23:14 ` Aw: " Thomas Gleixner
2020-11-05 9:20 ` Marc Zyngier
2020-11-05 13:59 ` Aw: " Frank Wunderlich
2020-11-05 23:00 ` Aw: " Thomas Gleixner
2020-11-06 9:43 ` Marc Zyngier
2020-11-21 16:12 ` Aw: " Frank Wunderlich
2021-01-03 13:08 ` Frank Wunderlich
2021-02-02 16:21 ` Frank Wunderlich
2020-11-03 10:31 ` Aw: " Thomas Gleixner
2020-11-03 11:41 ` Marc Zyngier
2020-11-03 14:23 ` Thomas Gleixner
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