Initialize default channel slave_id(req_sel) to -1 to avoid
overwriting of slave_id with client data as zero is the
valid slave_id(request_select).
Signed-off-by: Shardar Shariff Md <smohammed@xxxxxxxxxx>
---
drivers/dma/tegra20-apb-dma.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/dma/tegra20-apb-dma.c b/drivers/dma/tegra20-apb-dma.c
index 3871f29..35a0df0 100644
--- a/drivers/dma/tegra20-apb-dma.c
+++ b/drivers/dma/tegra20-apb-dma.c
@@ -204,7 +204,7 @@ struct tegra_dma_channel {
struct tasklet_struct tasklet;
/* Channel-slave specific configuration */
- unsigned int slave_id;
+ int slave_id;
struct dma_slave_config dma_sconfig;
struct tegra_dma_channel_regs channel_reg;
};
@@ -353,7 +353,7 @@ static int tegra_dma_slave_config(struct dma_chan *dc,
}
memcpy(&tdc->dma_sconfig, sconfig, sizeof(*sconfig));
- if (!tdc->slave_id)
+ if (tdc->slave_id == -1)
tdc->slave_id = sconfig->slave_id;
tdc->config_init = true;
return 0;
@@ -1236,7 +1236,7 @@ static void tegra_dma_free_chan_resources(struct dma_chan *dc)
}
pm_runtime_put(tdma->dev);
- tdc->slave_id = 0;
+ tdc->slave_id = -1;
}
static struct dma_chan *tegra_dma_of_xlate(struct of_phandle_args *dma_spec,
@@ -1389,6 +1389,7 @@ static int tegra_dma_probe(struct platform_device *pdev)
&tdma->dma_dev.channels);
tdc->tdma = tdma;
tdc->id = i;
+ tdc->slave_id = -1;
tasklet_init(&tdc->tasklet, tegra_dma_tasklet,
(unsigned long)tdc);
--
1.8.1.5
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