From: Vinod Koul <vkoul@kernel.org> To: Navid Emamdoost <navid.emamdoost@gmail.com> Cc: Dan Williams <dan.j.williams@intel.com>, Maxime Coquelin <mcoquelin.stm32@gmail.com>, Alexandre Torgue <alexandre.torgue@st.com>, dmaengine@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, emamd001@umn.edu, wu000273@umn.edu, kjlu@umn.edu, smccaman@umn.edu Subject: Re: [PATCH] engine: stm32-dma: call pm_runtime_put if pm_runtime_get_sync fails Date: Wed, 24 Jun 2020 13:09:32 +0530 [thread overview] Message-ID: <20200624073932.GO2324254@vkoul-mobl> (raw) In-Reply-To: <20200603183410.76764-1-navid.emamdoost@gmail.com> On 03-06-20, 13:34, Navid Emamdoost wrote: > Calling pm_runtime_get_sync increments the counter even in case of > failure, causing incorrect ref count. Call pm_runtime_put if > pm_runtime_get_sync fails. pls fix subsystem name as dmaengine: ... > > Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com> > --- > drivers/dma/stm32-dma.c | 8 ++++++-- > 1 file changed, 6 insertions(+), 2 deletions(-) > > diff --git a/drivers/dma/stm32-dma.c b/drivers/dma/stm32-dma.c > index 0ddbaa4b4f0b..0aab86bd97fe 100644 > --- a/drivers/dma/stm32-dma.c > +++ b/drivers/dma/stm32-dma.c > @@ -1169,8 +1169,10 @@ static int stm32_dma_alloc_chan_resources(struct dma_chan *c) > chan->config_init = false; > > ret = pm_runtime_get_sync(dmadev->ddev.dev); > - if (ret < 0) > + if (ret < 0) { > + pm_runtime_put(dmadev->ddev.dev); > return ret; > + } > > ret = stm32_dma_disable_chan(chan); > if (ret < 0) > @@ -1439,8 +1441,10 @@ static int stm32_dma_suspend(struct device *dev) > int id, ret, scr; > > ret = pm_runtime_get_sync(dev); > - if (ret < 0) > + if (ret < 0) { > + pm_runtime_put_sync(dev); why put_sync() > return ret; > + } > > for (id = 0; id < STM32_DMA_MAX_CHANNELS; id++) { > scr = stm32_dma_read(dmadev, STM32_DMA_SCR(id)); > -- > 2.17.1 -- ~Vinod
WARNING: multiple messages have this Message-ID (diff)
From: Vinod Koul <vkoul@kernel.org> To: Navid Emamdoost <navid.emamdoost@gmail.com> Cc: Alexandre Torgue <alexandre.torgue@st.com>, wu000273@umn.edu, kjlu@umn.edu, linux-kernel@vger.kernel.org, emamd001@umn.edu, Maxime Coquelin <mcoquelin.stm32@gmail.com>, smccaman@umn.edu, dmaengine@vger.kernel.org, Dan Williams <dan.j.williams@intel.com>, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH] engine: stm32-dma: call pm_runtime_put if pm_runtime_get_sync fails Date: Wed, 24 Jun 2020 13:09:32 +0530 [thread overview] Message-ID: <20200624073932.GO2324254@vkoul-mobl> (raw) In-Reply-To: <20200603183410.76764-1-navid.emamdoost@gmail.com> On 03-06-20, 13:34, Navid Emamdoost wrote: > Calling pm_runtime_get_sync increments the counter even in case of > failure, causing incorrect ref count. Call pm_runtime_put if > pm_runtime_get_sync fails. pls fix subsystem name as dmaengine: ... > > Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com> > --- > drivers/dma/stm32-dma.c | 8 ++++++-- > 1 file changed, 6 insertions(+), 2 deletions(-) > > diff --git a/drivers/dma/stm32-dma.c b/drivers/dma/stm32-dma.c > index 0ddbaa4b4f0b..0aab86bd97fe 100644 > --- a/drivers/dma/stm32-dma.c > +++ b/drivers/dma/stm32-dma.c > @@ -1169,8 +1169,10 @@ static int stm32_dma_alloc_chan_resources(struct dma_chan *c) > chan->config_init = false; > > ret = pm_runtime_get_sync(dmadev->ddev.dev); > - if (ret < 0) > + if (ret < 0) { > + pm_runtime_put(dmadev->ddev.dev); > return ret; > + } > > ret = stm32_dma_disable_chan(chan); > if (ret < 0) > @@ -1439,8 +1441,10 @@ static int stm32_dma_suspend(struct device *dev) > int id, ret, scr; > > ret = pm_runtime_get_sync(dev); > - if (ret < 0) > + if (ret < 0) { > + pm_runtime_put_sync(dev); why put_sync() > return ret; > + } > > for (id = 0; id < STM32_DMA_MAX_CHANNELS; id++) { > scr = stm32_dma_read(dmadev, STM32_DMA_SCR(id)); > -- > 2.17.1 -- ~Vinod _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-06-24 7:39 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-06-03 18:34 [PATCH] engine: stm32-dma: call pm_runtime_put if pm_runtime_get_sync fails Navid Emamdoost 2020-06-03 18:34 ` Navid Emamdoost 2020-06-24 7:39 ` Vinod Koul [this message] 2020-06-24 7:39 ` Vinod Koul 2020-06-24 7:48 ` Navid Emamdoost 2020-06-24 7:48 ` Navid Emamdoost
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