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Message-ID: <c6c9c8d2-cc6b-cd5b-a066-44bd970f9292@microchip.com>
Date: Wed, 11 May 2022 11:32:23 +0000
From: <Conor.Dooley@...rochip.com>
To: <xianting.tian@...ux.alibaba.com>, <paul.walmsley@...ive.com>,
<palmer@...belt.com>, <aou@...s.berkeley.edu>,
<akpm@...ux-foundation.org>, <anup@...infault.org>,
<wangkefeng.wang@...wei.com>, <rppt@...nel.org>, <alex@...ti.fr>,
<twd2.me@...il.com>, <david@...hat.com>, <seanjc@...gle.com>,
<petr.pavlu@...e.com>, <atishp@...osinc.com>
CC: <linux-riscv@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
<guoren@...nel.org>, <jianghuaming.jhm@...baba-inc.com>,
<mick@....forth.gr>
Subject: Re: [PATCH] RISC-V: Remove IORESOURCE_BUSY flag for no-map reserved
memory
On 11/05/2022 12:24, Xianting Tian wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
>
> Commit 00ab027a3b82 ("RISC-V: Add kernel image sections to the resource tree")
> added IORESOURCE_BUSY flag for no-map reserved memory, this casued
> devm_ioremap_resource() failed for the no-map reserved memory in subsequent
> operations of related driver, so remove the IORESOURCE_BUSY flag.
>
> The code to reproduce the issue,
> dts:
> mem0: memory@...00000 {
> reg = <0x0 0xa0000000 0 0x1000000>;
> no-map;
> };
>
> &test {
> status = "okay";
> memory-region = <&mem0>;
> };
>
> code:
> np = of_parse_phandle(pdev->dev.of_node, "memory-region", 0);
> ret = of_address_to_resource(np, 0, &r);
> base = devm_ioremap_resource(&pdev->dev, &r);
> // base = -EBUSY
>
> Fixes: 00ab027a3b82 ("RISC-V: Add kernel image sections to the resource tree")
> Reported-by: Huaming Jiang <jianghuaming.jhm@...baba-inc.com>
> Reviewed-by: Guo Ren <guoren@...nel.org>
> CC: Nick Kossifidis <mick@....forth.gr>
> Signed-off-by: Xianting Tian <xianting.tian@...ux.alibaba.com>
Hey Xianting,
This resend is no different to the patch you sent 5 mins ago, right?
Thanks,
Conor.
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