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From: "Pali Rohár" <pali@kernel.org>
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: "Lorenzo Pieralisi" <lorenzo.pieralisi@arm.com>,
	"Thomas Petazzoni" <thomas.petazzoni@bootlin.com>,
	"Rob Herring" <robh@kernel.org>,
	"Bjorn Helgaas" <bhelgaas@google.com>,
	"Russell King" <rmk+kernel@armlinux.org.uk>,
	"Marek Behún" <kabel@kernel.org>,
	"Remi Pommarel" <repk@triplefau.lt>, Xogium <contact@xogium.me>,
	"Tomasz Maciej Nowak" <tmn505@gmail.com>,
	"Marc Zyngier" <maz@kernel.org>,
	linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 05/42] PCI: pci-bridge-emul: Add PCIe Root Capabilities Register
Date: Fri, 7 May 2021 16:40:15 +0200	[thread overview]
Message-ID: <20210507144015.bol3qeqsdoo7nmju@pali> (raw)
In-Reply-To: <20210506231009.GA1444269@bjorn-Precision-5520>

On Thursday 06 May 2021 18:10:09 Bjorn Helgaas wrote:
> On Thu, May 06, 2021 at 05:31:16PM +0200, Pali Rohár wrote:
> > This is 16-bit register at offset 0x1E. Rename current 'rsvd' struct member
> > to 'rootcap'.
> 
> "The 16-bit Root Capabilities register is at offset 0x1e in the PCIe
> Capability."
> 
> Please make the commit log complete in itself.  In some contexts, the
> subject line is not visible at the same time.  It's fine to repeat the
> subject in the commit log.
> 
> > Signed-off-by: Pali Rohár <pali@kernel.org>
> > Reviewed-by: Marek Behún <kabel@kernel.org>
> > Fixes: 23a5fba4d941 ("PCI: Introduce PCI bridge emulated config space common logic")
> > Cc: stable@vger.kernel.org # e0d9d30b7354 ("PCI: pci-bridge-emul: Fix big-endian support")
> 
> I'm not sure how people would deal with *two* SHA1s.

I guess that this is fine per stable document as it mention such example:
https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html

I have already in past sent patches with Fixes:hash1 and CC:stable/hash2
and were taken correctly.

> This patch adds functionality, so it's not really fixing a bug in
> 23a5fba4d941.

I'm not sure what is the correct meaning of Fixes tag. I included it to
easily determinate in which commit was introduced member name "rsvd"
which should have been named "rootcap".

Submitting patches document is not fully clear for me as I understood it
that Fixes and CC:stable are two different things. E.g. it mention
"Attaching a Fixes: tag does not subvert ... the requirement to Cc:
stable@vger.kernel.org on all stable patch candidates." which I
understood that patch for backporting needs to have Cc:stable:
https://www.kernel.org/doc/html/latest/process/submitting-patches.html

But I will change it as needed. Just I did not know what is "the correct
way".

> I see that e0d9d30b7354 came along later and did
> "s/u16 rsvd/__le16 rsvd/".
> 
> But it seems like a lot to expect for distros and stable kernel
> maintainers to interpret this.
> 
> Personally I think I would omit both Fixes: and the stable tag since
> these two patches (05 and 06) are just adding functionality.
> 
> > ---
> >  drivers/pci/pci-bridge-emul.h | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/pci/pci-bridge-emul.h b/drivers/pci/pci-bridge-emul.h
> > index b31883022a8e..49bbd37ee318 100644
> > --- a/drivers/pci/pci-bridge-emul.h
> > +++ b/drivers/pci/pci-bridge-emul.h
> > @@ -54,7 +54,7 @@ struct pci_bridge_emul_pcie_conf {
> >  	__le16 slotctl;
> >  	__le16 slotsta;
> >  	__le16 rootctl;
> > -	__le16 rsvd;
> > +	__le16 rootcap;
> >  	__le32 rootsta;
> >  	__le32 devcap2;
> >  	__le16 devctl2;
> > -- 
> > 2.20.1
> > 

  reply	other threads:[~2021-05-07 14:40 UTC|newest]

Thread overview: 73+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-06 15:31 [PATCH 00/42] PCI: aardvark: Various driver fixes Pali Rohár
2021-05-06 15:31 ` [PATCH 01/42] PCI: aardvark: Fix kernel panic during PIO transfer Pali Rohár
2021-05-19  8:06   ` Pali Rohár
2021-05-06 15:31 ` [PATCH 02/42] PCI: aardvark: Fix checking for PIO Non-posted Request Pali Rohár
2021-05-06 15:31 ` [PATCH 03/42] PCI: aardvark: Fix checking for PIO status Pali Rohár
2021-05-06 15:31 ` [PATCH 04/42] PCI: aardvark: Increase polling delay to 1.5s while waiting for PIO response Pali Rohár
2021-05-06 15:31 ` [PATCH 05/42] PCI: pci-bridge-emul: Add PCIe Root Capabilities Register Pali Rohár
2021-05-06 23:10   ` Bjorn Helgaas
2021-05-07 14:40     ` Pali Rohár [this message]
2021-05-07 16:41       ` Bjorn Helgaas
2021-05-06 15:31 ` [PATCH 06/42] PCI: aardvark: Fix reporting CRS Software Visibility on emulated bridge Pali Rohár
2021-05-07 13:03   ` Bjorn Helgaas
2021-05-07 15:25     ` Pali Rohár
2021-05-07 15:33     ` Pali Rohár
2021-05-06 15:31 ` [PATCH 07/42] PCI: aardvark: Fix link training Pali Rohár
2021-05-06 15:31 ` [PATCH 08/42] PCI: Add PCI_EXP_DEVCTL_PAYLOAD_* macros Pali Rohár
2021-05-06 15:31 ` [PATCH 09/42] PCI: aardvark: Fix PCIe Max Payload Size setting Pali Rohár
2021-05-06 15:31 ` [PATCH 10/42] PCI: aardvark: Implement workaround for the readback value of VEND_ID Pali Rohár
2021-05-06 15:31 ` [PATCH 11/42] PCI: aardvark: Do not touch status bits of masked interrupts in interrupt handler Pali Rohár
2021-05-06 15:31 ` [PATCH 12/42] PCI: aardvark: Check for virq mapping when processing INTx IRQ Pali Rohár
2021-05-07  9:15   ` Marc Zyngier
2021-06-04 16:24     ` Pali Rohár
2021-06-04 16:29       ` Marc Zyngier
2021-05-06 15:31 ` [PATCH 13/42] PCI: aardvark: Remove irq_mask_ack callback for INTx interrupts Pali Rohár
2021-05-07  9:16   ` Marc Zyngier
2021-05-06 15:31 ` [PATCH 14/42] PCI: aardvark: Don't mask irq when mapping Pali Rohár
2021-05-07  9:20   ` Marc Zyngier
2021-05-07  9:27     ` Pali Rohár
2021-05-06 15:31 ` [PATCH 15/42] PCI: aardvark: Change name of INTx irq_chip to advk-INT Pali Rohár
2021-05-07  9:08   ` Marc Zyngier
2021-05-24 14:36     ` Marek Behún
2021-05-24 15:14       ` Marc Zyngier
2021-05-06 15:31 ` [PATCH 16/42] PCI: aardvark: Remove unneeded goto Pali Rohár
2021-05-06 15:31 ` [PATCH 17/42] PCI: aardvark: Fix support for MSI interrupts Pali Rohár
2021-05-07 10:16   ` Marc Zyngier
2021-05-07 14:44     ` Pali Rohár
2021-05-07 16:24       ` Marc Zyngier
2021-06-04 16:02         ` Pali Rohár
2021-06-04 16:22           ` Marc Zyngier
2021-05-06 15:31 ` [PATCH 18/42] PCI: aardvark: Correctly clear and unmask all " Pali Rohár
2021-05-07 10:19   ` Marc Zyngier
2021-05-07 10:21     ` Pali Rohár
2021-05-06 15:31 ` [PATCH 19/42] PCI: aardvark: Fix setting MSI address Pali Rohár
2021-05-07 10:25   ` Marc Zyngier
2021-05-06 15:31 ` [PATCH 20/42] PCI: aardvark: Add support for more than 32 MSI interrupts Pali Rohár
2021-07-02 21:35   ` Pali Rohár
2021-05-06 15:31 ` [PATCH 21/42] PCI: aardvark: Add support for masking " Pali Rohár
2021-05-06 15:31 ` [PATCH 22/42] PCI: aardvark: Enable MSI-X support Pali Rohár
2021-05-06 15:31 ` [PATCH 23/42] PCI: aardvark: Fix support for ERR interrupt on emulated bridge Pali Rohár
2021-05-06 15:31 ` [PATCH 24/42] PCI: aardvark: Fix support for PME " Pali Rohár
2021-05-06 15:31 ` [PATCH 25/42] PCI: aardvark: Fix support for PME requester " Pali Rohár
2021-05-06 15:31 ` [PATCH 26/42] PCI: aardvark: Fix support for bus mastering and PCI_COMMAND " Pali Rohár
2021-05-06 15:31 ` [PATCH 27/42] PCI: aardvark: Disable bus mastering and mask all interrupts when unbinding driver Pali Rohár
2021-05-06 15:31 ` [PATCH 28/42] PCI: aardvark: Free config space for emulated root bridge when unbinding driver to fix memory leak Pali Rohár
2021-05-06 15:31 ` [PATCH 29/42] PCI: aardvark: Reset PCIe card and disable PHY when unbinding driver Pali Rohár
2021-05-06 15:31 ` [PATCH 30/42] PCI: aardvark: Rewrite irq code to chained irq handler Pali Rohár
2021-05-06 15:31 ` [PATCH 31/42] PCI: aardvark: Use separate INTA interrupt for emulated root bridge Pali Rohár
2021-05-06 15:31 ` [PATCH 32/42] PCI: pci-bridge-emul: Add description for class_revision field Pali Rohár
2021-05-06 15:31 ` [PATCH 33/42] PCI: pci-bridge-emul: Add definitions for missing capabilities registers Pali Rohár
2021-05-06 15:31 ` [PATCH 34/42] PCI: aardvark: Add support for DEVCAP2, DEVCTL2, LNKCAP2 and LNKCTL2 registers on emulated bridge Pali Rohár
2021-05-06 15:31 ` [PATCH 35/42] PCI: aardvark: Add support for PCI_BRIDGE_CTL_BUS_RESET " Pali Rohár
2021-05-06 15:31 ` [PATCH 36/42] PCI: aardvark: Replace custom PCIE_CORE_ERR_CAPCTL_* macros by linux/pci_regs.h macros Pali Rohár
2021-05-06 15:31 ` [PATCH 37/42] PCI: aardvark: Replace custom PCIE_CORE_INT_* macros by linux PCI_INTERRUPT_* values Pali Rohár
2021-05-06 15:31 ` [PATCH 38/42] PCI: aardvark: Cleanup some register macros Pali Rohár
2021-05-06 15:31 ` [PATCH 39/42] PCI: aardvark: Add comments for OB_WIN_ENABLE and ADDR_WIN_DISABLE Pali Rohár
2021-05-06 15:31 ` [PATCH 40/42] PCI: pci-bridge-emul: re-arrange register tests Pali Rohár
2021-05-06 15:31 ` [PATCH 41/42] PCI: pci-bridge-emul: add support for PCIe extended capabilities Pali Rohár
2021-05-06 15:31 ` [PATCH 42/42] PCI: aardvark: Add support for Advanced Error Reporting registers on emulated bridge Pali Rohár
2021-06-03 15:16 ` [PATCH 00/42] PCI: aardvark: Various driver fixes Lorenzo Pieralisi
2021-06-03 17:02   ` Pali Rohár
2021-06-03 18:02   ` Simon Glass
2021-06-03 18:18     ` Pali Rohár
2021-06-04 14:05     ` Lorenzo Pieralisi

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