From: Alexander Usyskin Date: Mon, 4 May 2015 06:43:57 +0000 (+0300) Subject: mei: connection to fixed address clients from user-space X-Git-Tag: omap-for-v4.2/fixes-rc1^2~94^2~118 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=eeabfcf5a92ae3316b23f2da6a2bb5ba60a1b072;p=pandora-kernel.git mei: connection to fixed address clients from user-space This should be used for debug only. The feaure is gated by "allow_fixed_address" control exposed in debugfs. Signed-off-by: Alexander Usyskin Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/misc/mei/debugfs.c b/drivers/misc/mei/debugfs.c index 3f6d855a7ecb..88f5fd0b6dd7 100644 --- a/drivers/misc/mei/debugfs.c +++ b/drivers/misc/mei/debugfs.c @@ -209,6 +209,12 @@ int mei_dbgfs_register(struct mei_device *dev, const char *name) dev_err(dev->dev, "devstate: registration failed\n"); goto err; } + f = debugfs_create_bool("allow_fixed_address", S_IRUSR | S_IWUSR, dir, + &dev->allow_fixed_address); + if (!f) { + dev_err(dev->dev, "allow_fixed_address: registration failed\n"); + goto err; + } dev->dbgfs_dir = dir; return 0; err: diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c index a69636594150..2887e5607cd6 100644 --- a/drivers/misc/mei/main.c +++ b/drivers/misc/mei/main.c @@ -215,6 +215,11 @@ static ssize_t mei_read(struct file *file, char __user *ubuf, cb = mei_cl_read_cb(cl, file); if (!cb) { + if (mei_cl_is_fixed_address(cl) && dev->allow_fixed_address) { + cb = mei_cl_read_cb(cl, NULL); + if (cb) + goto copy_buffer; + } rets = 0; goto out; } @@ -389,7 +394,8 @@ static int mei_ioctl_connect_client(struct file *file, /* find ME client we're trying to connect to */ me_cl = mei_me_cl_by_uuid(dev, &data->in_client_uuid); - if (!me_cl || me_cl->props.fixed_address) { + if (!me_cl || + (me_cl->props.fixed_address && !dev->allow_fixed_address)) { dev_dbg(dev->dev, "Cannot connect to FW Client UUID = %pUl\n", &data->in_client_uuid); mei_me_cl_put(me_cl); Reading git-diff-tree failed