linux-kernel - Re: [PATCH] PCI: Generate uppercase hex for modalias var in uevent

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Date:	Thu, 4 Dec 2014 14:47:28 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] PCI: Generate uppercase hex for modalias var in uevent

On Tue, Dec 02, 2014 at 05:35:04PM +0100, Ricardo Ribalda Delgado wrote:
> Some implementations of modprobe fail to load the driver for a PCI device
> automatically because the "interface" part of the modalias from the kernel
> is lowercase, and the modalias from file2alias is uppercase.
> 
> The "interface" is the low-order byte of the Class Code, defined in PCI
> r3.0, Appendix D.  Most interface types defined in the spec do not use
> alpha characters, so they won't be affected.  For example, 00h, 01h, 10h,
> 20h, etc. are unaffected.
> 
> Print the "interface" byte of the Class Code in uppercase hex, as we
> already do for the Vendor ID, Device ID, Class, etc.
> 
> Commit 89ec3dcf17fd ("PCI: Generate uppercase hex for modalias
> interface class") fixed only half of the problem. Some udev
> implementations relays on the uevent file and not in the modalias file.
> 
> CC: Bjorn Helgaas <bhelgaas@...gle.com>
> CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Fixes: d1ded203adf1 ("PCI: add MODALIAS to hotplug event for pci devices")
> Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
> ---
> 
> Modified line is >80 char, but I believe that it is better than breaking
> the string or indent it bad.


Acked-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
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