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[V2,6/6] dmaengine: tegra-apb: Free interrupts before killing tasklets

Message ID 1447075429-27311-7-git-send-email-jonathanh@nvidia.com (mailing list archive)
State Changes Requested
Headers show

Commit Message

Jon Hunter Nov. 9, 2015, 1:23 p.m. UTC 
On probe failure or driver removal, before killing any tasklets, ensure
that the channel interrupt is freed to ensure that another channel
interrupt cannot occur and schedule the tasklet again.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
---
V2 changes:
- Updated patch to use free_irq instead of disable_irq

 drivers/dma/tegra20-apb-dma.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
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Patch

diff --git a/drivers/dma/tegra20-apb-dma.c b/drivers/dma/tegra20-apb-dma.c
index 004edcdb2d2e..d3892a106c1e 100644
--- a/drivers/dma/tegra20-apb-dma.c
+++ b/drivers/dma/tegra20-apb-dma.c
@@ -1396,8 +1396,7 @@  static int tegra_dma_probe(struct platform_device *pdev)
 		}
 		tdc->irq = res->start;
 		snprintf(tdc->name, sizeof(tdc->name), "apbdma.%d", i);
-		ret = devm_request_irq(&pdev->dev, tdc->irq,
-				tegra_dma_isr, 0, tdc->name, tdc);
+		ret = request_irq(tdc->irq, tegra_dma_isr, 0, tdc->name, tdc);
 		if (ret) {
 			dev_err(&pdev->dev,
 				"request_irq failed with err %d channel %d\n",
@@ -1478,6 +1477,8 @@  err_unregister_dma_dev:
 err_irq:
 	while (--i >= 0) {
 		struct tegra_dma_channel *tdc = &tdma->channels[i];
+
+		free_irq(tdc->irq, tdc);
 		tasklet_kill(&tdc->tasklet);
 	}
 
@@ -1497,6 +1498,7 @@  static int tegra_dma_remove(struct platform_device *pdev)
 
 	for (i = 0; i < tdma->chip_data->nr_channels; ++i) {
 		tdc = &tdma->channels[i];
+		free_irq(tdc->irq, tdc);
 		tasklet_kill(&tdc->tasklet);
 	}