[PATCHv4 08/15] dmaengine: fsldma: convert to platform_get_irq_optional()
From: Rosen Penev <hidden>
Date: 2026-06-11 03:53:17
Also in:
dmaengine, lkml, llvm
Subsystem:
dma generic offload engine subsystem, freescale dma driver, the rest · Maintainers:
Vinod Koul, Zhang Wei, Linus Torvalds
Replace the per-controller irq_of_parse_and_map() call with platform_get_irq_optional(). The controller IRQ is optional when absent (-ENXIO) and the driver falls back to per-channel IRQs. Any other error is treated as fatal. The corresponding irq_dispose_mapping() calls in the probe error path and remove function are removed. The per-channel IRQ mapping in fsl_dma_chan_probe() uses a child device_node rather than the platform device's of_node, so it is not converted here. Assisted-by: opencode:big-pickle Signed-off-by: Rosen Penev <redacted> Reviewed-by: Frank Li <Frank.Li@nxp.com> --- drivers/dma/fsldma.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index c04a7fbd2ed0..eba194d64105 100644
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c@@ -1213,7 +1213,6 @@ static void fsl_dma_chan_remove(struct fsldma_chan *chan) spin_unlock_bh(&chan->desc_lock); tasklet_kill(&chan->tasklet); - irq_dispose_mapping(chan->irq); list_del(&chan->common.device_node); iounmap(chan->regs); kfree(chan);
@@ -1248,7 +1247,14 @@ static int fsldma_of_probe(struct platform_device *op) } /* map the channel IRQ if it exists, but don't hookup the handler yet */ - fdev->irq = irq_of_parse_and_map(op->dev.of_node, 0); + fdev->irq = platform_get_irq_optional(op, 0); + if (fdev->irq < 0) { + if (fdev->irq != -ENXIO) { + err = fdev->irq; + goto out_iounmap; + } + fdev->irq = 0; + } dma_cap_set(DMA_MEMCPY, fdev->common.cap_mask); dma_cap_set(DMA_SLAVE, fdev->common.cap_mask);
@@ -1317,7 +1323,7 @@ static int fsldma_of_probe(struct platform_device *op) if (fdev->chan[i]) fsl_dma_chan_remove(fdev->chan[i]); } - irq_dispose_mapping(fdev->irq); +out_iounmap: iounmap(fdev->regs); out_free: kfree(fdev);
@@ -1353,7 +1359,6 @@ static void fsldma_of_remove(struct platform_device *op) if (chans[i]) fsl_dma_chan_remove(chans[i]); } - irq_dispose_mapping(fdev->irq); iounmap(fdev->regs); kfree(fdev);
--
2.54.0