From mboxrd@z Thu Jan 1 00:00:00 1970 From: Amit Shah Subject: Re: [PATCH v2 3/4] virtio: rng: delay hwrng_register() till driver is ready Date: Tue, 22 Jul 2014 22:38:34 +0530 Message-ID: <20140722170834.GA23129@grmbl.mre> References: <91cb7c5b87cf2ba5ef1bacd55a7ee7bc827293a2.1405942162.git.amit.shah@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <91cb7c5b87cf2ba5ef1bacd55a7ee7bc827293a2.1405942162.git.amit.shah@redhat.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org To: linux-kernel@vger.kernel.org Cc: jason@lakedaemon.net, keescook@chromium.org, Virtualization List , herbert@gondor.apana.org.au List-Id: virtualization@lists.linuxfoundation.org On (Mon) 21 Jul 2014 [17:15:51], Amit Shah wrote: > Instead of calling hwrng_register() in the probe routing, call it in the > scan routine. This ensures that when hwrng_register() is successful, > and it requests a few random bytes to seed the kernel's pool at init, > we're ready to service that request. > > This will also enable us to remove the workaround added previously to > check whether probe was completed, and only then ask for data from the > host. The revert follows in the next commit. > > There's a slight behaviour change here on unsuccessful hwrng_register(). > Previously, when hwrng_unregister() failed, the probe() routine would typo: should be hwrng_register(). Please fix this up when picking up the patch. Thanks, > fail, and the vqs would be torn down, and driver would be marked not > initialized. Now, the vqs will remain initialized, driver would be > marked initialized as well, but won't be available in the list of RNGs > available to hwrng core. To fix the failures, the procedure remains the > same, i.e. unload and re-load the module, and hope things succeed the > next time around. > > Signed-off-by: Amit Shah Amit