When watching the interrupts through /proc/interrupts,
the name of the interrupts are blank or garbage. The
reason is the pointer passed for devname during irq
registration is stack and so it get changed after
dma registration completes.
Allocate the pointer as part of dma channel and pass
this pointer as the devname for irq registration to
avoid change of name.
Signed-off-by: Laxman Dewangan <ldewangan@xxxxxxxxxx>
---
drivers/dma/tegra20-apb-dma.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/dma/tegra20-apb-dma.c b/drivers/dma/tegra20-apb-dma.c
index 24a6512..528c62d 100644
--- a/drivers/dma/tegra20-apb-dma.c
+++ b/drivers/dma/tegra20-apb-dma.c
@@ -169,6 +169,7 @@ typedef void (*dma_isr_handler)(struct tegra_dma_channel *tdc,
/* tegra_dma_channel: Channel specific information */
struct tegra_dma_channel {
struct dma_chan dma_chan;
+ char name[30];
bool config_init;
int id;
int irq;
@@ -1282,7 +1283,6 @@ static int __devinit tegra_dma_probe(struct platform_device *pdev)
INIT_LIST_HEAD(&tdma->dma_dev.channels);
for (i = 0; i < cdata->nr_channels; i++) {
struct tegra_dma_channel *tdc = &tdma->channels[i];
- char irq_name[30];
tdc->chan_base_offset = TEGRA_APBDMA_CHANNEL_BASE_ADD_OFFSET +
i * TEGRA_APBDMA_CHANNEL_REGISTER_SIZE;
@@ -1294,9 +1294,9 @@ static int __devinit tegra_dma_probe(struct platform_device *pdev)
goto err_irq;
}
tdc->irq = res->start;
- snprintf(irq_name, sizeof(irq_name), "apbdma.%d", i);
+ snprintf(tdc->name, sizeof(tdc->name), "apbdma.%d", i);
ret = devm_request_irq(&pdev->dev, tdc->irq,
- tegra_dma_isr, 0, irq_name, tdc);
+ tegra_dma_isr, 0, tdc->name, tdc);
if (ret) {
dev_err(&pdev->dev,
"request_irq failed with err %d channel %d\n",
--
1.7.1.1
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