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authorFabio Estevam <fabio.estevam@freescale.com>2015-07-29 21:03:49 -0300
committerVinod Koul <vinod.koul@intel.com>2015-08-20 10:52:12 +0530
commitb93edcdd037f713e9b62cc76fb2064282af01aec (patch)
treec8ea5015389652097cb056e8634a40f520b0a688 /drivers/dma/imx-sdma.c
parentb096c1377d1e50cea91d1db13bca8e7802199a67 (diff)
downloadlinux-b93edcdd037f713e9b62cc76fb2064282af01aec.tar.bz2
dmaengine: imx-sdma: Check for clk_enable() errors
clk_enable() may fail, so we should better check the return value and propagate it in the case of error. Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/imx-sdma.c')
-rw-r--r--drivers/dma/imx-sdma.c29
1 files changed, 22 insertions, 7 deletions
diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index acf1e2f0c23c..9d375bc7590a 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -1093,16 +1093,20 @@ static int sdma_alloc_chan_resources(struct dma_chan *chan)
sdmac->event_id0 = data->dma_request;
sdmac->event_id1 = data->dma_request2;
- clk_enable(sdmac->sdma->clk_ipg);
- clk_enable(sdmac->sdma->clk_ahb);
+ ret = clk_enable(sdmac->sdma->clk_ipg);
+ if (ret)
+ return ret;
+ ret = clk_enable(sdmac->sdma->clk_ahb);
+ if (ret)
+ goto disable_clk_ipg;
ret = sdma_request_channel(sdmac);
if (ret)
- return ret;
+ goto disable_clk_ahb;
ret = sdma_set_channel_priority(sdmac, prio);
if (ret)
- return ret;
+ goto disable_clk_ahb;
dma_async_tx_descriptor_init(&sdmac->desc, chan);
sdmac->desc.tx_submit = sdma_tx_submit;
@@ -1110,6 +1114,12 @@ static int sdma_alloc_chan_resources(struct dma_chan *chan)
sdmac->desc.flags = DMA_CTRL_ACK;
return 0;
+
+disable_clk_ahb:
+ clk_disable(sdmac->sdma->clk_ahb);
+disable_clk_ipg:
+ clk_disable(sdmac->sdma->clk_ipg);
+ return ret;
}
static void sdma_free_chan_resources(struct dma_chan *chan)
@@ -1533,8 +1543,12 @@ static int sdma_init(struct sdma_engine *sdma)
int i, ret;
dma_addr_t ccb_phys;
- clk_enable(sdma->clk_ipg);
- clk_enable(sdma->clk_ahb);
+ ret = clk_enable(sdma->clk_ipg);
+ if (ret)
+ return ret;
+ ret = clk_enable(sdma->clk_ahb);
+ if (ret)
+ goto disable_clk_ipg;
/* Be sure SDMA has not started yet */
writel_relaxed(0, sdma->regs + SDMA_H_C0PTR);
@@ -1590,8 +1604,9 @@ static int sdma_init(struct sdma_engine *sdma)
return 0;
err_dma_alloc:
- clk_disable(sdma->clk_ipg);
clk_disable(sdma->clk_ahb);
+disable_clk_ipg:
+ clk_disable(sdma->clk_ipg);
dev_err(sdma->dev, "initialisation failed with %d\n", ret);
return ret;
}