linux-kernel - RE: [PATCH] PCI: hisi: fix deferred probing

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Message-ID: <EE11001F9E5DDD47B7634E2F8A612F2E162AA609@lhreml503-mbs>
Date:	Fri, 13 Nov 2015 03:06:27 +0000
From:	Gabriele Paoloni <gabriele.paoloni@...wei.com>
To:	Arnd Bergmann <arnd@...db.de>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"Wangzhou (B)" <wangzhou1@...ilicon.com>
CC:	Jisheng Zhang <jszhang@...vell.com>,
	"bhelgaas@...gle.com" <bhelgaas@...gle.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] PCI: hisi: fix deferred probing

Thanks Arnd, this looks ok to me

Zhou Wang can you please Ack?

> -----Original Message-----
> From: linux-kernel-owner@...r.kernel.org [mailto:linux-kernel-
> owner@...r.kernel.org] On Behalf Of Arnd Bergmann
> Sent: 12 November 2015 12:22
> To: linux-arm-kernel@...ts.infradead.org
> Cc: Jisheng Zhang; Wangzhou (B); bhelgaas@...gle.com; linux-
> pci@...r.kernel.org; linux-kernel@...r.kernel.org
> Subject: [PATCH] PCI: hisi: fix deferred probing
> 
> The hisi_pcie_probe function is incorrectly marked as __init, as Kconfig
> tells us:
> 
> WARNING: drivers/pci/host/built-in.o(.data+0x7780): Section mismatch in
> reference from the variable hisi_pcie_driver to the
> function .init.text:hisi_pcie_probe()
> 
> If the probe for this device gets deferred past the point where __init
> functions are removed, or the device is unbound and then reattached to
> the driver, we branch into uninitialized memory, which is bad.
> 
> This removes the __init annotation.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> 
> diff --git a/drivers/pci/host/pcie-hisi.c b/drivers/pci/host/pcie-hisi.c
> index 35457ecd8e70..163671a4f798 100644
> --- a/drivers/pci/host/pcie-hisi.c
> +++ b/drivers/pci/host/pcie-hisi.c
> @@ -111,7 +111,7 @@ static struct pcie_host_ops hisi_pcie_host_ops = {
>  	.link_up = hisi_pcie_link_up,
>  };
> 
> -static int __init hisi_add_pcie_port(struct pcie_port *pp,
> +static int hisi_add_pcie_port(struct pcie_port *pp,
>  				     struct platform_device *pdev)
>  {
>  	int ret;
> @@ -139,7 +139,7 @@ static int __init hisi_add_pcie_port(struct pcie_port *pp,
>  	return 0;
>  }
> 
> -static int __init hisi_pcie_probe(struct platform_device *pdev)
> +static int hisi_pcie_probe(struct platform_device *pdev)
>  {
>  	struct hisi_pcie *hisi_pcie;
>  	struct pcie_port *pp;
> 
> --
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