From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Return-Path: From: Alex Elder Subject: [PATCH 1/3] remoteproc: fix a bug in rproc_alloc() Date: Fri, 3 Apr 2020 12:50:03 -0500 Message-Id: <20200403175005.17130-2-elder@linaro.org> In-Reply-To: <20200403175005.17130-1-elder@linaro.org> References: <20200403175005.17130-1-elder@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit To: Bjorn Andersson , Ohad Ben-Cohen , Andy Gross Cc: linux-remoteproc@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org List-ID: If ida_simple_get() returns an error when called in rproc_alloc(), put_device() is called to clean things up. By this time the rproc device type has been assigned, with rproc_type_release() as the release function. The first thing rproc_type_release() does is call: idr_destroy(&rproc->notifyids); But at the time the ida_simple_get() call is made, the notifyids field in the remoteproc structure has not been initialized. I'm not actually sure this case causes an observable problem, but it's incorrect. Fix this by initializing the notifyids field before calling ida_simple_get() in rproc_alloc(). Signed-off-by: Alex Elder --- drivers/remoteproc/remoteproc_core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index e12a54e67588..59b6eb22f01c 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -2054,6 +2054,8 @@ struct rproc *rproc_alloc(struct device *dev, const char *name, rproc->dev.class = &rproc_class; rproc->dev.driver_data = rproc; + idr_init(&rproc->notifyids); + /* Assign a unique device index and name */ rproc->index = ida_simple_get(&rproc_dev_index, 0, 0, GFP_KERNEL); if (rproc->index < 0) { @@ -2078,8 +2080,6 @@ struct rproc *rproc_alloc(struct device *dev, const char *name, mutex_init(&rproc->lock); - idr_init(&rproc->notifyids); - INIT_LIST_HEAD(&rproc->carveouts); INIT_LIST_HEAD(&rproc->mappings); INIT_LIST_HEAD(&rproc->traces); -- 2.20.1