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Wed, 2 Mar 2022 14:12:43 -0500 (EST) Date: Wed, 2 Mar 2022 21:12:23 +0200 From: Dafna Hirschfeld To: Laurent Pinchart Cc: linux-media@vger.kernel.org, Heiko Stuebner , Paul Elder , Tomasz Figa , linux-rockchip@lists.infradead.org Subject: Re: [PATCH 04/16] media: rkisp1: resizer: Fix and simplify (un)registration Message-ID: <20220302191223.t2eee4t4jtsk2hl4@guri> References: <20220227160116.18556-1-laurent.pinchart@ideasonboard.com> <20220227160116.18556-5-laurent.pinchart@ideasonboard.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20220227160116.18556-5-laurent.pinchart@ideasonboard.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220302_111306_547446_32C93A6E X-CRM114-Status: GOOD ( 20.36 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org On 27.02.2022 18:01, Laurent Pinchart wrote: > The rkisp1_rsz_register() and rkisp1_rsz_unregister() functions don't > destroy the mutex (in the error path for the former). Fix this, simplify > error handling at registration time as media_entity_cleanup() can be > called on an uninitialized entity, and make rkisp1_rsz_unregister() and > rkisp1_resizer_devs_unregister() safe to be called on an unregistered > resizer subdev to prepare for simplification of error handling at probe > time. > > Signed-off-by: Laurent Pinchart > --- > .../platform/rockchip/rkisp1/rkisp1-resizer.c | 34 +++++++++---------- > 1 file changed, 17 insertions(+), 17 deletions(-) > > diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-resizer.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-resizer.c > index 2070f4b06705..65ce8d647118 100644 > --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-resizer.c > +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-resizer.c > @@ -782,8 +782,12 @@ static const struct v4l2_subdev_ops rkisp1_rsz_ops = { > > static void rkisp1_rsz_unregister(struct rkisp1_resizer *rsz) > { > + if (!rsz->rkisp1) > + return; > + > v4l2_device_unregister_subdev(&rsz->sd); > media_entity_cleanup(&rsz->sd.entity); > + mutex_destroy(&rsz->ops_lock); > } > > static int rkisp1_rsz_register(struct rkisp1_resizer *rsz) > @@ -821,47 +825,43 @@ static int rkisp1_rsz_register(struct rkisp1_resizer *rsz) > mutex_init(&rsz->ops_lock); > ret = media_entity_pads_init(&sd->entity, RKISP1_RSZ_PAD_MAX, pads); > if (ret) > - return ret; > + goto error; > > ret = v4l2_device_register_subdev(&rsz->rkisp1->v4l2_dev, sd); > if (ret) { > dev_err(sd->dev, "Failed to register resizer subdev\n"); > - goto err_cleanup_media_entity; > + goto error; > } > > rkisp1_rsz_init_config(sd, &state); > return 0; > > -err_cleanup_media_entity: > +error: > media_entity_cleanup(&sd->entity); > - > + mutex_destroy(&rsz->ops_lock); > + rsz->rkisp1 = NULL; > return ret; > } > > int rkisp1_resizer_devs_register(struct rkisp1_device *rkisp1) > { > - struct rkisp1_resizer *rsz; > - unsigned int i, j; > + unsigned int i; > int ret; > > for (i = 0; i < ARRAY_SIZE(rkisp1->resizer_devs); i++) { > - rsz = &rkisp1->resizer_devs[i]; > + struct rkisp1_resizer *rsz = &rkisp1->resizer_devs[i]; > + > rsz->rkisp1 = rkisp1; > rsz->id = i; > + > ret = rkisp1_rsz_register(rsz); > - if (ret) > - goto err_unreg_resizer_devs; > + if (ret) { same as previous comment, I think it is nice to set rsz->rkisp1 = NULL here. Thanks, Dafna > + rkisp1_resizer_devs_unregister(rkisp1); > + return ret; > + } > } > > return 0; > - > -err_unreg_resizer_devs: > - for (j = 0; j < i; j++) { > - rsz = &rkisp1->resizer_devs[j]; > - rkisp1_rsz_unregister(rsz); > - } > - > - return ret; > } > > void rkisp1_resizer_devs_unregister(struct rkisp1_device *rkisp1) > -- > Regards, > > Laurent Pinchart > _______________________________________________ Linux-rockchip mailing list Linux-rockchip@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-rockchip