Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Peter Ujfalusi <peter.ujfalusi@ti.com>
To:     <vkoul@kernel.org>, <robh+dt@kernel.org>, <nm@ti.com>,
        <ssantosh@kernel.org>
CC:     <dan.j.williams@intel.com>, <dmaengine@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <grygorii.strashko@ti.com>, <lokeshvutla@ti.com>,
        <t-kristo@ti.com>, <tony@atomide.com>
Subject: [PATCH 07/16] dmaengine: Add function to request slave channel from a dma_device
Date:   Mon, 6 May 2019 15:34:47 +0300
Message-ID: <20190506123456.6777-8-peter.ujfalusi@ti.com>
In-Reply-To: <20190506123456.6777-1-peter.ujfalusi@ti.com>
References: <20190506123456.6777-1-peter.ujfalusi@ti.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Content-Type: text/plain
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

dma_get_any_slave_channel() would skip using the filter function, which
in some cases needed to be executed before the alloc_chan_resources
callback to make sure that all parameters are provided for the slave
channel.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
---
 drivers/dma/dmaengine.c   | 7 ++++---
 include/linux/dmaengine.h | 5 ++++-
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 8eed5ff0fc01..7ec93be12088 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -617,7 +617,8 @@ struct dma_chan *dma_get_slave_channel(struct dma_chan *chan)
 }
 EXPORT_SYMBOL_GPL(dma_get_slave_channel);
 
-struct dma_chan *dma_get_any_slave_channel(struct dma_device *device)
+struct dma_chan *dmadev_get_slave_channel(struct dma_device *device,
+					  dma_filter_fn fn, void *fn_param)
 {
 	dma_cap_mask_t mask;
 	struct dma_chan *chan;
@@ -628,13 +629,13 @@ struct dma_chan *dma_get_any_slave_channel(struct dma_device *device)
 	/* lock against __dma_request_channel */
 	mutex_lock(&dma_list_mutex);
 
-	chan = find_candidate(device, &mask, NULL, NULL);
+	chan = find_candidate(device, &mask, fn, fn_param);
 
 	mutex_unlock(&dma_list_mutex);
 
 	return IS_ERR(chan) ? NULL : chan;
 }
-EXPORT_SYMBOL_GPL(dma_get_any_slave_channel);
+EXPORT_SYMBOL_GPL(dmadev_get_slave_channel);
 
 /**
  * __dma_request_channel - try to allocate an exclusive channel
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index c1486564a314..4774b66f2064 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -1541,7 +1541,10 @@ int dmaenginem_async_device_register(struct dma_device *device);
 void dma_async_device_unregister(struct dma_device *device);
 void dma_run_dependencies(struct dma_async_tx_descriptor *tx);
 struct dma_chan *dma_get_slave_channel(struct dma_chan *chan);
-struct dma_chan *dma_get_any_slave_channel(struct dma_device *device);
+struct dma_chan *dmadev_get_slave_channel(struct dma_device *device,
+					  dma_filter_fn fn, void *fn_param);
+#define dma_get_any_slave_channel(device) \
+	dmadev_get_slave_channel(device, NULL, NULL)
 #define dma_request_channel(mask, x, y) __dma_request_channel(&(mask), x, y)
 #define dma_request_slave_channel_compat(mask, x, y, dev, name) \
 	__dma_request_slave_channel_compat(&(mask), x, y, dev, name)
-- 
Peter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki