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[91.159.150.230]) by smtp.gmail.com with ESMTPSA id k18-20020a192d12000000b0047920d89606sm614250lfj.187.2022.06.04.13.57.42 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 04 Jun 2022 13:57:42 -0700 (PDT) Message-ID: Date: Sat, 4 Jun 2022 23:59:02 +0300 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.9.1 Content-Language: en-US To: Miaoqian Lin , dave.jiang@intel.com, Vinod Koul , dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org References: <20220601110013.55366-1-linmq006@gmail.com> From: =?UTF-8?Q?P=c3=a9ter_Ujfalusi?= Subject: Re: [PATCH v2] dmaengine: ti: Add missing put_device in ti_dra7_xbar_route_allocate In-Reply-To: <20220601110013.55366-1-linmq006@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-2.9 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A, RDNS_NONE,SPF_HELO_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 01/06/2022 14:00, Miaoqian Lin wrote: > of_find_device_by_node() takes reference, we should use put_device() > to release it when not need anymore. adding a new label and using goto would be another option or even better? > Fixes: a074ae38f859 ("dmaengine: Add driver for TI DMA crossbar on DRA7x") > Signed-off-by: Miaoqian Lin > --- > changes in v2: > - split v1 into two patches. > v1 link: > https://lore.kernel.org/r/20220512051815.11946-1-linmq006@gmail.com > --- > drivers/dma/ti/dma-crossbar.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/dma/ti/dma-crossbar.c b/drivers/dma/ti/dma-crossbar.c > index 71d24fc07c00..06da13b18a7b 100644 > --- a/drivers/dma/ti/dma-crossbar.c > +++ b/drivers/dma/ti/dma-crossbar.c > @@ -245,6 +245,7 @@ static void *ti_dra7_xbar_route_allocate(struct of_phandle_args *dma_spec, > if (dma_spec->args[0] >= xbar->xbar_requests) { > dev_err(&pdev->dev, "Invalid XBAR request number: %d\n", > dma_spec->args[0]); > + put_device(&pdev->dev); > return ERR_PTR(-EINVAL); > } > > @@ -252,12 +253,14 @@ static void *ti_dra7_xbar_route_allocate(struct of_phandle_args *dma_spec, > dma_spec->np = of_parse_phandle(ofdma->of_node, "dma-masters", 0); > if (!dma_spec->np) { > dev_err(&pdev->dev, "Can't get DMA master\n"); > + put_device(&pdev->dev); > return ERR_PTR(-EINVAL); > } > > map = kzalloc(sizeof(*map), GFP_KERNEL); > if (!map) { > of_node_put(dma_spec->np); > + put_device(&pdev->dev); > return ERR_PTR(-ENOMEM); > } > > @@ -268,6 +271,7 @@ static void *ti_dra7_xbar_route_allocate(struct of_phandle_args *dma_spec, > mutex_unlock(&xbar->mutex); > dev_err(&pdev->dev, "Run out of free DMA requests\n"); > kfree(map); > + put_device(&pdev->dev); this will not apply with the other patch going separately... Can you send a two patch series? While there, I would check if labels+goto would look better? Thanks for finding these and fixing it! > return ERR_PTR(-ENOMEM); > } > set_bit(map->xbar_out, xbar->dma_inuse); -- Péter