patch "mei: make sysfs modalias format similar as uevent modalias" added to char-misc-linus

patch "mei: make sysfs modalias format similar as uevent modalias" added to char-misc-linus

[gregkh]

This is a note to let you know that I've just added the patch titled

    mei: make sysfs modalias format similar as uevent modalias

to my char-misc git tree which can be found at
    git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git
in the char-misc-linus branch.

The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the
next -rc kernel release.

If you have any questions about this process, please let me know.


>From 6f9193ec044a8f72d8b6ae94a5c4ab6e8b0f00ca Mon Sep 17 00:00:00 2001
From: Pratyush Anand <panand@redhat.com>
Date: Mon, 29 May 2017 22:08:24 +0300
Subject: mei: make sysfs modalias format similar as uevent modalias

modprobe is not able to resolve sysfs modalias for mei devices.

 # cat
/sys/class/watchdog/watchdog0/device/watchdog/watchdog0/device/modalias
mei::05b79a6f-4628-4d7f-899d-a91514cb32ab:
 # modprobe --set-version 4.9.6-200.fc25.x86_64 -R
mei::05b79a6f-4628-4d7f-899d-a91514cb32ab:
modprobe: FATAL: Module mei::05b79a6f-4628-4d7f-899d-a91514cb32ab: not
found in directory /lib/modules/4.9.6-200.fc25.x86_64
 # cat /lib/modules/4.9.6-200.fc25.x86_64/modules.alias | grep
05b79a6f-4628-4d7f-899d-a91514cb32ab
alias mei:*:05b79a6f-4628-4d7f-899d-a91514cb32ab:*:* mei_wdt

commit b26864cad1c9 ("mei: bus: add client protocol
version to the device alias"), however sysfs modalias
is still in formmat mei:S:uuid:*.

This patch equates format of uevent and sysfs modalias so that modprobe
is able to resolve the aliases.

Cc: <stable@vger.kernel.org> 4.7+
Fixes: commit b26864cad1c9 ("mei: bus: add client protocol version to the device alias")
Signed-off-by: Pratyush Anand <panand@redhat.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/misc/mei/bus.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c
index d1928fdd0f43..07aad8576334 100644
--- a/drivers/misc/mei/bus.c
+++ b/drivers/misc/mei/bus.c
@@ -763,8 +763,10 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *a,
 {
 	struct mei_cl_device *cldev = to_mei_cl_device(dev);
 	const uuid_le *uuid = mei_me_cl_uuid(cldev->me_cl);
+	u8 version = mei_me_cl_ver(cldev->me_cl);
 
-	return scnprintf(buf, PAGE_SIZE, "mei:%s:%pUl:", cldev->name, uuid);
+	return scnprintf(buf, PAGE_SIZE, "mei:%s:%pUl:%02X:",
+			 cldev->name, uuid, version);
 }
 static DEVICE_ATTR_RO(modalias);
 
-- 
2.13.0