[1/2] remoteproc: Split driver and consumer dereferencing

Message ID	1475455600-31689-1-git-send-email-bjorn.andersson@linaro.org
State	Accepted
Commit	433c0e04bc06da6d049c691a9ef238d61edb841c
Headers	show Delivered-To: patch@linaro.org Received-SPF: pass (google.com: best guess record for domain of linux-arm-kernel-bounces+patch=linaro.org@lists.infradead.org designates 2001:1868:205::9 as permitted sender) client-ip=2001:1868:205::9; From: Bjorn Andersson <bjorn.andersson@linaro.org> To: Ohad Ben-Cohen <ohad@wizery.com>, Bjorn Andersson <bjorn.andersson@linaro.org>, Patrice Chotard <patrice.chotard@st.com> Subject: [PATCH 1/2] remoteproc: Split driver and consumer dereferencing Date: Sun, 2 Oct 2016 17:46:38 -0700 Message-Id: <1475455600-31689-1-git-send-email-bjorn.andersson@linaro.org> summary: Content analysis details: (-2.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [2607:f8b0:400e:c00:0:0:0:22d listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid Precedence: list Cc: linux-doc@vger.kernel.org, Jonathan Corbet <corbet@lwn.net>, linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" <linux-arm-kernel-bounces@lists.infradead.org> Errors-To: linux-arm-kernel-bounces+patch=linaro.org@lists.infradead.org

diff --git a/Documentation/remoteproc.txt b/Documentation/remoteproc.txt index ef0219fa4bb4..f07597482351 100644 --- a/Documentation/remoteproc.txt +++ b/Documentation/remoteproc.txt @@ -101,9 +101,9 @@ int dummy_rproc_example(struct rproc *my_rproc) On success, the new rproc is returned, and on failure, NULL. Note: _never_ directly deallocate @rproc, even if it was not registered - yet. Instead, when you need to unroll rproc_alloc(), use rproc_put(). + yet. Instead, when you need to unroll rproc_alloc(), use rproc_free(). - void rproc_put(struct rproc *rproc) + void rproc_free(struct rproc *rproc) - Free an rproc handle that was allocated by rproc_alloc. This function essentially unrolls rproc_alloc(), by decrementing the rproc's refcount. It doesn't directly free rproc; that would happen @@ -131,7 +131,7 @@ int dummy_rproc_example(struct rproc *my_rproc) has completed successfully. After rproc_del() returns, @rproc is still valid, and its - last refcount should be decremented by calling rproc_put(). + last refcount should be decremented by calling rproc_free(). Returns 0 on success and -EINVAL if @rproc isn't valid. diff --git a/drivers/remoteproc/da8xx_remoteproc.c b/drivers/remoteproc/da8xx_remoteproc.c index 12823d078e1e..1afac8f31be0 100644 --- a/drivers/remoteproc/da8xx_remoteproc.c +++ b/drivers/remoteproc/da8xx_remoteproc.c @@ -261,7 +261,7 @@ static int da8xx_rproc_probe(struct platform_device *pdev) return 0; free_rproc: - rproc_put(rproc); + rproc_free(rproc); return ret; } @@ -290,7 +290,7 @@ static int da8xx_rproc_remove(struct platform_device *pdev) disable_irq(drproc->irq); rproc_del(rproc); - rproc_put(rproc); + rproc_free(rproc); return 0; } diff --git a/drivers/remoteproc/omap_remoteproc.c b/drivers/remoteproc/omap_remoteproc.c index 01e234cb9157..fa63bf2eb885 100644 --- a/drivers/remoteproc/omap_remoteproc.c +++ b/drivers/remoteproc/omap_remoteproc.c @@ -215,7 +215,7 @@ static int omap_rproc_probe(struct platform_device *pdev) return 0; free_rproc: - rproc_put(rproc); + rproc_free(rproc); return ret; } @@ -224,7 +224,7 @@ static int omap_rproc_remove(struct platform_device *pdev) struct rproc *rproc = platform_get_drvdata(pdev); rproc_del(rproc); - rproc_put(rproc); + rproc_free(rproc); return 0; } diff --git a/drivers/remoteproc/qcom_q6v5_pil.c b/drivers/remoteproc/qcom_q6v5_pil.c index 05b04573e87d..2e0caaaa766a 100644 --- a/drivers/remoteproc/qcom_q6v5_pil.c +++ b/drivers/remoteproc/qcom_q6v5_pil.c @@ -875,7 +875,7 @@ static int q6v5_probe(struct platform_device *pdev) return 0; free_rproc: - rproc_put(rproc); + rproc_free(rproc); return ret; } @@ -885,7 +885,7 @@ static int q6v5_remove(struct platform_device *pdev) struct q6v5 *qproc = platform_get_drvdata(pdev); rproc_del(qproc->rproc); - rproc_put(qproc->rproc); + rproc_free(qproc->rproc); return 0; } diff --git a/drivers/remoteproc/qcom_wcnss.c b/drivers/remoteproc/qcom_wcnss.c index 1917de7db91c..f5cedeaafba1 100644 --- a/drivers/remoteproc/qcom_wcnss.c +++ b/drivers/remoteproc/qcom_wcnss.c @@ -585,7 +585,7 @@ static int wcnss_probe(struct platform_device *pdev) return of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev); free_rproc: - rproc_put(rproc); + rproc_free(rproc); return ret; } @@ -598,7 +598,7 @@ static int wcnss_remove(struct platform_device *pdev) qcom_smem_state_put(wcnss->state); rproc_del(wcnss->rproc); - rproc_put(wcnss->rproc); + rproc_free(wcnss->rproc); return 0; } diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index 3da566b0d437..ede3af14b9d0 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -1307,7 +1307,7 @@ static struct device_type rproc_type = { * On success the new rproc is returned, and on failure, NULL. * * Note: _never_ directly deallocate @rproc, even if it was not registered - * yet. Instead, when you need to unroll rproc_alloc(), use rproc_put(). + * yet. Instead, when you need to unroll rproc_alloc(), use rproc_free(). */ struct rproc *rproc_alloc(struct device *dev, const char *name, const struct rproc_ops *ops, @@ -1386,7 +1386,22 @@ struct rproc *rproc_alloc(struct device *dev, const char *name, EXPORT_SYMBOL(rproc_alloc); /** - * rproc_put() - unroll rproc_alloc() + * rproc_free() - unroll rproc_alloc() + * @rproc: the remote processor handle + * + * This function decrements the rproc dev refcount. + * + * If no one holds any reference to rproc anymore, then its refcount would + * now drop to zero, and it would be freed. + */ +void rproc_free(struct rproc *rproc) +{ + put_device(&rproc->dev); +} +EXPORT_SYMBOL(rproc_free); + +/** + * rproc_put() - release rproc reference * @rproc: the remote processor handle * * This function decrements the rproc dev refcount. @@ -1411,7 +1426,7 @@ EXPORT_SYMBOL(rproc_put); * * After rproc_del() returns, @rproc isn't freed yet, because * of the outstanding reference created by rproc_alloc. To decrement that - * one last refcount, one still needs to call rproc_put(). + * one last refcount, one still needs to call rproc_free(). * * Returns 0 on success and -EINVAL if @rproc isn't valid. */ diff --git a/drivers/remoteproc/st_remoteproc.c b/drivers/remoteproc/st_remoteproc.c index 6f056caa8a56..ae8963fcc8c8 100644 --- a/drivers/remoteproc/st_remoteproc.c +++ b/drivers/remoteproc/st_remoteproc.c @@ -262,7 +262,7 @@ static int st_rproc_probe(struct platform_device *pdev) return 0; free_rproc: - rproc_put(rproc); + rproc_free(rproc); return ret; } @@ -277,7 +277,7 @@ static int st_rproc_remove(struct platform_device *pdev) of_reserved_mem_device_release(&pdev->dev); - rproc_put(rproc); + rproc_free(rproc); return 0; } diff --git a/drivers/remoteproc/ste_modem_rproc.c b/drivers/remoteproc/ste_modem_rproc.c index 53dc17bdd54e..03d69a9a3c5b 100644 --- a/drivers/remoteproc/ste_modem_rproc.c +++ b/drivers/remoteproc/ste_modem_rproc.c @@ -257,7 +257,7 @@ static int sproc_drv_remove(struct platform_device *pdev) rproc_del(sproc->rproc); dma_free_coherent(sproc->rproc->dev.parent, SPROC_FW_SIZE, sproc->fw_addr, sproc->fw_dma_addr); - rproc_put(sproc->rproc); + rproc_free(sproc->rproc); mdev->drv_data = NULL; @@ -325,7 +325,7 @@ static int sproc_probe(struct platform_device *pdev) free_rproc: /* Reset device data upon error */ mdev->drv_data = NULL; - rproc_put(rproc); + rproc_free(rproc); return err; } diff --git a/drivers/remoteproc/wkup_m3_rproc.c b/drivers/remoteproc/wkup_m3_rproc.c index 3811cb522af3..18175d0331fd 100644 --- a/drivers/remoteproc/wkup_m3_rproc.c +++ b/drivers/remoteproc/wkup_m3_rproc.c @@ -208,7 +208,7 @@ static int wkup_m3_rproc_probe(struct platform_device *pdev) return 0; err_put_rproc: - rproc_put(rproc); + rproc_free(rproc); err: pm_runtime_put_noidle(dev); pm_runtime_disable(dev); @@ -220,7 +220,7 @@ static int wkup_m3_rproc_remove(struct platform_device *pdev) struct rproc *rproc = platform_get_drvdata(pdev); rproc_del(rproc); - rproc_put(rproc); + rproc_free(rproc); pm_runtime_put_sync(&pdev->dev); pm_runtime_disable(&pdev->dev); diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h index c321eab5054e..930023b7c825 100644 --- a/include/linux/remoteproc.h +++ b/include/linux/remoteproc.h @@ -493,6 +493,7 @@ struct rproc *rproc_alloc(struct device *dev, const char *name, void rproc_put(struct rproc *rproc); int rproc_add(struct rproc *rproc); int rproc_del(struct rproc *rproc); +void rproc_free(struct rproc *rproc); int rproc_boot(struct rproc *rproc); void rproc_shutdown(struct rproc *rproc);

[1/2] remoteproc: Split driver and consumer dereferencing

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