Re: [PATCH v3 2/2] spi: qcom-geni: Add panic notifier to cancel and reset DMA during panic

[Mukesh Savaliya]

On 8/18/2026 6:58 PM, Praveen Talari wrote:
[...]

> +static int spi_geni_panic_notifier(struct notifier_block *nb,
> +				   unsigned long action, void *data)
> +{
> +	struct spi_geni_master *mas = container_of(nb, struct spi_geni_master, panic_nb);
> +	struct spi_controller *spi = dev_get_drvdata(mas->dev);
> +	struct geni_se *se = &mas->se;
> +	u32 val;
> +
> +	if (!pm_runtime_active(mas->dev))

Not completely sure, but why not NOTIFY_DONE ? we haven't handled 
anything here.

> +		return NOTIFY_OK;
> +
> +	if (mas->cur_xfer_mode == GENI_GPI_DMA) {
> +		dmaengine_terminate_async(mas->tx);
> +		dmaengine_terminate_async(mas->rx);
> +		return NOTIFY_OK;
> +	}
> +
> +	if (!(readl_relaxed(se->base + SE_GENI_STATUS) & M_GENI_CMD_ACTIVE))
Shouldn't this be under FIFO mode check  ? As i can see SE DMA mode and 
GPI mode conditions present but not for FIFO.

> +		return NOTIFY_OK;
> +
> +	if (!spi->target) {
> +		geni_se_cancel_m_cmd(se);
> +		if (!readl_poll_timeout_atomic(se->base + SE_GENI_M_IRQ_STATUS, val,
> +					       val & M_CMD_CANCEL_EN, 10, 50000)) {
> +			writel_relaxed(M_CMD_CANCEL_EN, se->base + SE_GENI_M_IRQ_CLEAR);
> +			return NOTIFY_OK;
> +		}
> +	}
> +
> +	geni_se_abort_m_cmd(se);

why abort is done directly for target device and not for master ?
shouldn't be combined with cancel failure ?
> +	if (!readl_poll_timeout_atomic(se->base + SE_GENI_M_IRQ_STATUS, val,
> +				       val & M_CMD_ABORT_EN, 10, 50000))
> +		writel_relaxed(M_CMD_ABORT_EN, se->base + SE_GENI_M_IRQ_CLEAR);
> +
> +	if (mas->cur_xfer_mode == GENI_SE_DMA) {
> +		writel_relaxed(1, se->base + SE_DMA_TX_FSM_RST);
> +		readl_poll_timeout_atomic(se->base + SE_DMA_TX_IRQ_STAT, val,
> +					  val & TX_RESET_DONE, 10, 50000);
> +		writel_relaxed(val, se->base + SE_DMA_TX_IRQ_CLR);
> +
> +		writel_relaxed(1, se->base + SE_DMA_RX_FSM_RST);
> +		readl_poll_timeout_atomic(se->base + SE_DMA_RX_IRQ_STAT, val,
> +					  val & RX_RESET_DONE, 10, 50000);
May be good to declar macro for 10usec and 50msec ? Multiple places it's 
being used.> +		writel_relaxed(val, se->base + SE_DMA_RX_IRQ_CLR);
> +	}
> +
> +	return NOTIFY_OK;
> +}
> +[...]