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drivers: dma: stm32: avoid clear TE in case of hal_override #97741

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drivers: dma: stm32: avoid clear TE in case of hal_override #97741

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47a8344
drivers: dma: stm32: avoid clear TE in case of hal_override
Oct 16, 2025
445302d
drivers: dma: stm32: avoid clear flags if hal_override on unexpected irq
Oct 18, 2025
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18 changes: 13 additions & 5 deletions drivers/dma/dma_stm32.c
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Original file line number Diff line number Diff line change
Expand Up @@ -129,14 +129,22 @@ static void dma_stm32_irq_handler(const struct device *dev, uint32_t id)
}
stream->dma_callback(dev, stream->user_data, callback_arg, DMA_STATUS_COMPLETE);
} else if (stm32_dma_is_unexpected_irq_happened(dma, id)) {
LOG_ERR("Unexpected irq happened.");
/* Let HAL DMA handle flags on its own */
if (!stream->hal_override) {
LOG_ERR("Unexpected irq happened.");
stm32_dma_dump_stream_irq(dma, id);
stm32_dma_clear_stream_irq(dma, id);
}
stream->dma_callback(dev, stream->user_data,
callback_arg, -EIO);
} else {
LOG_ERR("Transfer Error.");
stream->busy = false;
dma_stm32_dump_stream_irq(dev, id);
dma_stm32_clear_stream_irq(dev, id);
/* Let HAL DMA handle flags on its own */
if (!stream->hal_override) {
LOG_ERR("Transfer Error.");
stream->busy = false;
dma_stm32_dump_stream_irq(dev, id);
dma_stm32_clear_stream_irq(dev, id);
}
Comment on lines +141 to +147
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Maybe we should log nonetheless?

Suggested change
/* Let HAL DMA handle flags on its own */
if (!stream->hal_override) {
LOG_ERR("Transfer Error.");
stream->busy = false;
dma_stm32_dump_stream_irq(dev, id);
dma_stm32_clear_stream_irq(dev, id);
}
LOG_ERR("Transfer Error.");
if (!stream->hal_override) {
/* Let HAL DMA handle flags on its own */
stream->busy = false;
dma_stm32_dump_stream_irq(dev, id);
dma_stm32_clear_stream_irq(dev, id);
}

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Hum, considering that in case of HAL_OVERRIDE is being use, the Zephyr DMA framework is mainly use for resource handling rather than DMA functionaly speaking, I do not think that in such condition we should LOG anything here. If that's the HAL which is handling the DMA control, error checking etc, let's let it fully handle (aka configure, error handling etc).

Don't misunderstand me, I am not saying that we should bypass all and forever the Zephyr DMA framework ;) however in current implementation I do not see much merit to have the Zephyr DMA log this message. At least in case of DCMI, we have the callback in place to also get notification of transfer error. I suppose that's also the same thing for other drivers relying on HAL_OVERRIDE.

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Fine by me 🙂

stream->dma_callback(dev, stream->user_data,
callback_arg, -EIO);
}
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3 changes: 0 additions & 3 deletions drivers/dma/dma_stm32_v1.c
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Original file line number Diff line number Diff line change
Expand Up @@ -306,9 +306,6 @@ bool stm32_dma_is_unexpected_irq_happened(DMA_TypeDef *dma, uint32_t id)
if (LL_DMA_IsEnabledIT_FE(dma, dma_stm32_id_to_stream(id)) &&
dma_stm32_is_fe_active(dma, id)) {
LOG_ERR("FiFo error.");
stm32_dma_dump_stream_irq(dma, id);
stm32_dma_clear_stream_irq(dma, id);

return true;
}

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