linux-kernel - RE: [PATCH v12 02/25] genirq/irqdomain: Remove the param count restriction from select()

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Date: Fri, 23 Feb 2024 11:01:18 +0000
From: Biju Das <biju.das.jz@...renesas.com>
To: Marek Szyprowski <m.szyprowski@...sung.com>, Anup Patel
	<apatel@...tanamicro.com>, Palmer Dabbelt <palmer@...belt.com>, Paul Walmsley
	<paul.walmsley@...ive.com>, Thomas Gleixner <tglx@...utronix.de>, Rob Herring
	<robh+dt@...nel.org>, Krzysztof Kozlowski
	<krzysztof.kozlowski+dt@...aro.org>, Frank Rowand <frowand.list@...il.com>,
	Conor Dooley <conor+dt@...nel.org>
CC: Marc Zyngier <maz@...nel.org>, Björn Töpel
	<bjorn@...nel.org>, Atish Patra <atishp@...shpatra.org>, Andrew Jones
	<ajones@...tanamicro.com>, Sunil V L <sunilvl@...tanamicro.com>, Saravana
 Kannan <saravanak@...gle.com>, Anup Patel <anup@...infault.org>,
	"linux-riscv@...ts.infradead.org" <linux-riscv@...ts.infradead.org>,
	"linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "devicetree@...r.kernel.org"
	<devicetree@...r.kernel.org>
Subject: RE: [PATCH v12 02/25] genirq/irqdomain: Remove the param count
 restriction from select()

Hi Marek Szyprowski,

> -----Original Message-----
> From: Marek Szyprowski <m.szyprowski@...sung.com>
> Sent: Friday, February 23, 2024 10:57 AM
> Subject: Re: [PATCH v12 02/25] genirq/irqdomain: Remove the param count
> restriction from select()
> 
> On 23.02.2024 11:45, Biju Das wrote:
> >> On 27.01.2024 17:17, Anup Patel wrote:
> >>> From: Thomas Gleixner <tglx@...utronix.de>
> >>>
> >>> Now that the GIC-v3 callback can handle invocation with a fwspec
> >>> parameter count of 0 lift the restriction in the core code and
> >>> invoke
> >>> select() unconditionally when the domain provides it.
> >>>
> >>> Preparatory change for per device MSI domains.
> >>>
> >>> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
> >>> Signed-off-by: Anup Patel <apatel@...tanamicro.com>
> >>
> >> This patch landed recently in linux-next (next-20240221) as commit
> >> de1ff306dcf4 ("genirq/irqdomain: Remove the param count restriction
> >> from select()"). I've noticed that it breaks booting of Qualcomm's
> >> Robotics
> >> RB5 ARM64 board (arch/arm64/boot/dts/qcom/qrb5165-rb5.dts). Booting
> >> freezes after "clk: Disabling unused clocks", but this is probably a
> >> consequence of some earlier failure. Reverting $subject on top of
> >> next-20240221 fixes this problem. Let me know how can I help
> >> debugging this issue.
> >>
> >>
> >>> ---
> >>>    kernel/irq/irqdomain.c | 2 +-
> >>>    1 file changed, 1 insertion(+), 1 deletion(-)
> >>>
> >>> diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c index
> >>> 0bdef4fe925b..8fee37918195 100644
> >>> --- a/kernel/irq/irqdomain.c
> >>> +++ b/kernel/irq/irqdomain.c
> >>> @@ -448,7 +448,7 @@ struct irq_domain
> >>> *irq_find_matching_fwspec(struct
> >> irq_fwspec *fwspec,
> >>>    	 */
> >>>    	mutex_lock(&irq_domain_mutex);
> >>>    	list_for_each_entry(h, &irq_domain_list, link) {
> >>> -		if (h->ops->select && fwspec->param_count)
> >>> +		if (h->ops->select)
> >>>    			rc = h->ops->select(h, fwspec, bus_token);
> >>>    		else if (h->ops->match)
> >>>    			rc = h->ops->match(h, to_of_node(fwnode),
> bus_token);
> > This patch looks reverted on todays's next. But there was a fix for
> > fixing the issue you mentioned [1]
> >
> > [1]
> > https://jpn01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flore
> > .kernel.org%2Fall%2F170844679345.398.17551290253758129895.tip-bot2%40t
> > ip-bot2%2F&data=05%7C02%7Cbiju.das.jz%40bp.renesas.com%7Cffce754120ba4
> > ff0f8d708dc345e1c1a%7C53d82571da1947e49cb4625a166a4a2a%7C0%7C0%7C63844
> > 2825998732581%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2lu
> > MzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=lYLVpa4tz2fEU1Jc
> > DDGUF6eigi2YJuGDouMXrJSlibo%3D&reserved=0
> 
> Thanks! Today's next seems to be broken on ARM64 (doesn't compile here),
> so I've missed it.

FYI, ARM64 defconfig works for me.
Linux smarc-rzg2l 6.8.0-rc5-next-20240223-gfebe82167ab7 #1430 SMP PREEMPT Fri Feb 23 07:41:52 GMT 2024 aarch64 GNU/Linux

Cheers,
Biju