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Thu, 18 Jul 2019 10:50:58 -0700 (PDT) Date: Thu, 18 Jul 2019 13:50:58 -0400 From: Sean Paul To: Sam Ravnborg Subject: Re: [PATCH v1 05/11] drm/vblank: drop use of DRM_WAIT_ON() Message-ID: <20190718175058.GH31819@art_vandelay> References: <20190718161507.2047-1-sam@ravnborg.org> <20190718161507.2047-6-sam@ravnborg.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20190718161507.2047-6-sam@ravnborg.org> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190718_105100_135211_613F1E04 X-CRM114-Status: GOOD ( 18.73 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: David Airlie , Liviu Dudau , dri-devel@lists.freedesktop.org, Chris Wilson , Eric Anholt , Rob Herring , Stefan Agner , Maxime Ripard , CK Hu , Thierry Reding , Daniel Vetter , Chunming Zhou , Jani Nikula , Intel Graphics Development , Maarten Lankhorst , linux-mediatek@lists.infradead.org, Lionel Landwerlin , Matthias Brugger , Sean Paul , linux-arm-kernel@lists.infradead.org, Boris Brezillon , Thomas Zimmermann , Rob Clark , Noralf =?iso-8859-1?Q?Tr=F8nnes?= , Philipp Zabel , Christian =?iso-8859-1?Q?K=F6nig?= Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Jul 18, 2019 at 06:15:01PM +0200, Sam Ravnborg wrote: > DRM_WAIT_ON() is from the deprecated drm_os_linux header and > the modern replacement is the wait_event_*. > > The return values differ, so a conversion is needed to > keep the original interface towards userspace. > Introduced a switch/case to make code obvious and to allow > different debug prints depending on the result. > > Signed-off-by: Sam Ravnborg Reviewed-by: Sean Paul > Cc: Maarten Lankhorst > Cc: Maxime Ripard > Cc: Sean Paul > Cc: David Airlie > Cc: Daniel Vetter > --- > drivers/gpu/drm/drm_vblank.c | 29 ++++++++++++++++++++--------- > 1 file changed, 20 insertions(+), 9 deletions(-) > > diff --git a/drivers/gpu/drm/drm_vblank.c b/drivers/gpu/drm/drm_vblank.c > index 603ab105125d..8e9ac187500e 100644 > --- a/drivers/gpu/drm/drm_vblank.c > +++ b/drivers/gpu/drm/drm_vblank.c > @@ -31,7 +31,6 @@ > #include > #include > #include > -#include > #include > > #include "drm_internal.h" > @@ -1672,19 +1671,31 @@ int drm_wait_vblank_ioctl(struct drm_device *dev, void *data, > if (req_seq != seq) { > DRM_DEBUG("waiting on vblank count %llu, crtc %u\n", > req_seq, pipe); > - DRM_WAIT_ON(ret, vblank->queue, 3 * HZ, > - vblank_passed(drm_vblank_count(dev, pipe), > - req_seq) || > - !READ_ONCE(vblank->enabled)); > + ret = wait_event_interruptible_timeout(vblank->queue, > + vblank_passed(drm_vblank_count(dev, pipe), req_seq) || > + !READ_ONCE(vblank->enabled), > + msecs_to_jiffies(3000)); > } > > - if (ret != -EINTR) { > + switch (ret) { > + case 0: > + /* timeout */ > + ret = -EBUSY; > drm_wait_vblank_reply(dev, pipe, &vblwait->reply); > - > - DRM_DEBUG("crtc %d returning %u to client\n", > + DRM_DEBUG("timeout waiting for vblank. crtc %d returning %u to client\n", > pipe, vblwait->reply.sequence); > - } else { > + break; > + case -ERESTARTSYS: > + /* interrupted by signal */ > + ret = -EINTR; > DRM_DEBUG("crtc %d vblank wait interrupted by signal\n", pipe); > + break; > + default: > + ret = 0; > + drm_wait_vblank_reply(dev, pipe, &vblwait->reply); > + DRM_DEBUG("crtc %d returning %u to client\n", > + pipe, vblwait->reply.sequence); > + break; > } > > done: > -- > 2.20.1 > -- Sean Paul, Software Engineer, Google / Chromium OS _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel