From mboxrd@z Thu Jan 1 00:00:00 1970 From: Afzal Mohammed Subject: Re: [PATCH] Revert "drm/nouveau/fifo/gk104: kick channels when deactivating them" Date: Wed, 12 Aug 2015 11:30:52 +0530 Message-ID: <20150812060052.GA4242@afzalpc> References: <1439353058-10001-1-git-send-email-acourbot@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1439353058-10001-1-git-send-email-acourbot@nvidia.com> Sender: linux-kernel-owner@vger.kernel.org To: Alexandre Courbot Cc: David Airlie , Ben Skeggs , Eric Biggers , dri-devel@lists.freedesktop.org, nouveau@lists.freedesktop.org, linux-kernel@vger.kernel.org, gnurou@gmail.com List-Id: nouveau.vger.kernel.org Hi, On Wed, Aug 12, 2015 at 01:17:38PM +0900, Alexandre Courbot wrote: > This reverts commit 1addc1264852 > > This commit seems to cause crashes in gk104_fifo_intr_runlist() by > returning 0xbad0da00 when register 0x2a00 is read. Since this commit was > intended for GM20B which is not completely supported yet, let's revert > it for the time being. > > Reported-by: Eric Biggers > Signed-off-by: Alexandre Courbot > --- > David, it would be great if this could be merged for 4.2 since lots of > users could potentially experience this issue. Thanks! Tested-by: Afzal Mohammed Please help $subject reach mainline for 4.2, w/o this revert, the system here hangs most (>90%) of the time at boot time. As an aside, yesterday after a marathon git bisect, came to the same solution (though I don't understand what that change means). Was about to report it and saw this one. Thanks Alexandre. W/o the revert, in the rare case where it boots, below is observed in addition to as compared to w/ revert, [ 9.826010] nouveau E[ PBUS][0000:01:00.0] MMIO read of 0x00000000 FAULT at 0x122130 [ !ENGINE ] Regards Afzal