From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Theodore Ts'o To: Linux Kernel Developers List Cc: ewust@umich.edu, zakir@umich.edu, nadiah@cs.ucsd.edu, jhalderm@umich.edu, Mark Brown , Theodore Ts'o , stable@vger.kernel.org Subject: [PATCH 12/12] mfd: wm831x: Feed the device UUID into device_add_randomness() Date: Fri, 6 Jul 2012 18:45:04 -0400 Message-Id: <1341614704-24965-13-git-send-email-tytso@mit.edu> In-Reply-To: <1341614704-24965-1-git-send-email-tytso@mit.edu> References: <1341614704-24965-1-git-send-email-tytso@mit.edu> Sender: linux-kernel-owner@vger.kernel.org List-ID: From: Mark Brown wm831x devices contain a unique ID value. Feed this into the newly added device_add_randomness() to add some per device seed data to the pool. Signed-off-by: Mark Brown Signed-off-by: Theodore Ts'o Cc: stable@vger.kernel.org --- drivers/mfd/wm831x-otp.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/mfd/wm831x-otp.c b/drivers/mfd/wm831x-otp.c index f742745..b90f3e0 100644 --- a/drivers/mfd/wm831x-otp.c +++ b/drivers/mfd/wm831x-otp.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include @@ -66,6 +67,7 @@ static DEVICE_ATTR(unique_id, 0444, wm831x_unique_id_show, NULL); int wm831x_otp_init(struct wm831x *wm831x) { + char uuid[WM831X_UNIQUE_ID_LEN]; int ret; ret = device_create_file(wm831x->dev, &dev_attr_unique_id); @@ -73,6 +75,12 @@ int wm831x_otp_init(struct wm831x *wm831x) dev_err(wm831x->dev, "Unique ID attribute not created: %d\n", ret); + ret = wm831x_unique_id_read(wm831x, uuid); + if (ret == 0) + add_device_randomness(uuid, sizeof(uuid)); + else + dev_err(wm831x->dev, "Failed to read UUID: %d\n", ret); + return ret; } -- 1.7.11.1.108.gb129051