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mei: add mei_me_cl_by_uuid_id function

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When handling dynamic clients there might be a race
scenario in which two me clients with the same me
address would be linked in the me clients list,
therefore we need to search by both uuid and me address.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomas Winkler
2014-08-21 14:29:15 +03:00
committed by Greg Kroah-Hartman
parent 25ca6472b5
commit d880f3294d
8 changed files with 26 additions and 9 deletions
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3
drivers/misc/mei/main.c
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@@ -321,7 +321,7 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
goto out;
}
me_cl = mei_me_cl_by_id(dev, cl->me_client_id);
me_cl = mei_me_cl_by_uuid_id(dev, &cl->cl_uuid, cl->me_client_id);
if (!me_cl) {
rets = -ENOTTY;
goto out;
@@ -459,6 +459,7 @@ static int mei_ioctl_connect_client(struct file *file,
}
cl->me_client_id = me_cl->client_id;
cl->cl_uuid = me_cl->props.protocol_name;
dev_dbg(&dev->pdev->dev, "Connect to FW Client ID = %d\n",
cl->me_client_id);