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From: Frank Wunderlich <frank-w@public-files.de>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Marc Zyngier <maz@kernel.org>, Ryder Lee <ryder.lee@mediatek.com>,
	linux-mediatek@lists.infradead.org,
	Frank Wunderlich <linux@fw-web.de>,
	linux-kernel@vger.kernel.org,
	Matthias Brugger <matthias.bgg@gmail.com>,
	linux-pci@vger.kernel.org, Bjorn Helgaas <bhelgaas@google.com>
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


WARNING: multiple messages have this Message-ID (diff)
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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Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek

  parent reply	other threads:[~2020-11-04 16:53 UTC|newest]

Thread overview: 62+ 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 14:03 ` Frank Wunderlich
2020-10-31 21:49 ` Thomas Gleixner
2020-10-31 21:49   ` Thomas Gleixner
2020-11-01  9:25   ` Frank Wunderlich
2020-11-01  9:25     ` Frank Wunderlich
2020-11-01 11:17     ` Thomas Gleixner
2020-11-01 11:17       ` Thomas Gleixner
2020-11-01 11:43     ` Marc Zyngier
2020-11-01 11:43       ` Marc Zyngier
2020-11-01 15:58       ` Aw: " Frank Wunderlich
2020-11-01 15:58         ` Frank Wunderlich
2020-11-01 17:54       ` Ryder Lee
2020-11-01 17:54         ` Ryder Lee
2020-11-01 18:27         ` Aw: " Frank Wunderlich
2020-11-01 18:27           ` Frank Wunderlich
2020-11-01 21:47           ` Marc Zyngier
2020-11-01 21:47             ` Marc Zyngier
2020-11-01 22:27             ` Thomas Gleixner
2020-11-01 22:27               ` Thomas Gleixner
2020-11-02 11:30               ` Marc Zyngier
2020-11-02 11:30                 ` Marc Zyngier
2020-11-02 11:56                 ` Aw: " Frank Wunderlich
2020-11-02 11:56                   ` Frank Wunderlich
2020-11-02 13:58                   ` Marc Zyngier
2020-11-02 13:58                     ` Marc Zyngier
2020-11-02 14:27                     ` Aw: " Frank Wunderlich
2020-11-02 14:27                       ` Frank Wunderlich
2020-11-02 16:16                 ` Aw: " Thomas Gleixner
2020-11-02 16:16                   ` Thomas Gleixner
2020-11-02 22:18                   ` Thomas Gleixner
2020-11-02 22:18                     ` Thomas Gleixner
2020-11-03  9:54                     ` Marc Zyngier
2020-11-03  9:54                       ` Marc Zyngier
2020-11-03 10:16                       ` Thomas Gleixner
2020-11-03 10:16                         ` Thomas Gleixner
2020-11-03 10:29                         ` Marc Zyngier
2020-11-03 10:29                           ` Marc Zyngier
2020-11-04 16:49                         ` Frank Wunderlich [this message]
2020-11-04 16:49                           ` Aw: " Frank Wunderlich
2020-11-04 23:14                           ` Thomas Gleixner
2020-11-04 23:14                             ` Thomas Gleixner
2020-11-05  9:20                             ` Marc Zyngier
2020-11-05  9:20                               ` Marc Zyngier
2020-11-05 13:59                               ` Aw: " Frank Wunderlich
2020-11-05 13:59                                 ` Frank Wunderlich
2020-11-05 23:00                               ` Aw: " Thomas Gleixner
2020-11-05 23:00                                 ` Thomas Gleixner
2020-11-06  9:43                                 ` Marc Zyngier
2020-11-06  9:43                                   ` Marc Zyngier
2020-11-21 16:12                                   ` Aw: " Frank Wunderlich
2020-11-21 16:12                                     ` Frank Wunderlich
2021-01-03 13:08                                     ` Frank Wunderlich
2021-01-03 13:08                                       ` Frank Wunderlich
2021-02-02 16:21                                   ` Frank Wunderlich
2021-02-02 16:21                                     ` Frank Wunderlich
2020-11-03 10:31                       ` Aw: " Thomas Gleixner
2020-11-03 10:31                         ` Thomas Gleixner
2020-11-03 11:41                         ` Marc Zyngier
2020-11-03 11:41                           ` Marc Zyngier
2020-11-03 14:23                           ` Thomas Gleixner
2020-11-03 14:23                             ` Thomas Gleixner

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