hwrng: chaoskey - drop workaround for old hwrng core limitation

The hwrng core used to mask 'quality' with 1023; that has been removed
in commit 506bf0c0464ace57169aadcf02ae397999c57bdd ("hwrng: core - allow
perfect entropy from hardware devices"), so we can now just set quality
to 1024.

Signed-off-by: Julien Cristau <jcristau@debian.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/misc/chaoskey.c b/drivers/usb/misc/chaoskey.c
index 6ddd08a32777c6f636789e2b15a5ba430a5fb9af..aa350dc9eb25c2db5a785fbd5147229d0cf06963 100644 (file)
--- a/drivers/usb/misc/chaoskey.c
+++ b/drivers/usb/misc/chaoskey.c
@@ -215,19 +215,7 @@ static int chaoskey_probe(struct usb_interface *interface,
 
        dev->hwrng.name = dev->name ? dev->name : chaoskey_driver.name;
        dev->hwrng.read = chaoskey_rng_read;
-
-       /* Set the 'quality' metric.  Quality is measured in units of
-        * 1/1024's of a bit ("mills"). This should be set to 1024,
-        * but there is a bug in the hwrng core which masks it with
-        * 1023.
-        *
-        * The patch that has been merged to the crypto development
-        * tree for that bug limits the value to 1024 at most, so by
-        * setting this to 1024 + 1023, we get 1023 before the fix is
-        * merged and 1024 afterwards. We'll patch this driver once
-        * both bits of code are in the same tree.
-        */
-       dev->hwrng.quality = 1024 + 1023;
+       dev->hwrng.quality = 1024;
 
        dev->hwrng_registered = (hwrng_register(&dev->hwrng) == 0);
        if (!dev->hwrng_registered)