linux-kernel - Re: [PATCH 1/1] PCI/IDE: Fix reading a wrong reg for unused sel stream initialization

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Message-ID: <aWRiVuxVYDqSxo4I@yilunxu-OptiPlex-7050>
Date: Mon, 12 Jan 2026 10:54:14 +0800
From: Xu Yilun <yilun.xu@...ux.intel.com>
To: Li Ming <ming.li@...omail.com>
Cc: dan.j.williams@...el.com, linux-pci@...r.kernel.org,
	linux-coco@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] PCI/IDE: Fix reading a wrong reg for unused sel
 stream initialization

On Sun, Jan 11, 2026 at 03:38:23PM +0800, Li Ming wrote:
> During pci_ide_init(), it will write PCI_ID_RESERVED_STREAM_ID into all
> unused selective IDE stream blocks. In a selective IDE stream block, IDE
> stream ID field is in selective IDE stream control register instead of
> selective IDE stream capability register.
> 
> Fixes: 079115370d00 ("PCI/IDE: Initialize an ID for all IDE streams")
> Signed-off-by: Li Ming <ming.li@...omail.com>
> ---
>  drivers/pci/ide.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/pci/ide.c b/drivers/pci/ide.c
> index f0ef474e1a0d..26f7cc94ec31 100644
> --- a/drivers/pci/ide.c
> +++ b/drivers/pci/ide.c
> @@ -168,7 +168,7 @@ void pci_ide_init(struct pci_dev *pdev)
>  	for (u16 i = 0; i < nr_streams; i++) {
>  		int pos = __sel_ide_offset(ide_cap, nr_link_ide, i, nr_ide_mem);
>  
> -		pci_read_config_dword(pdev, pos + PCI_IDE_SEL_CAP, &val);
> +		pci_read_config_dword(pdev, pos + PCI_IDE_SEL_CTL, &val);

Reviewed-by: Xu Yilun <yilun.xu@...ux.intel.com>