* Tony Lindgren <tony@xxxxxxxxxxx> [170113 08:27]:
> @@ -316,11 +318,12 @@ static irqreturn_t cppi41_irq(int irq, void *data)
> __iormb();
>
> while (val) {
> + unsigned long flags;
> u32 desc, len;
> int error;
>
> error = pm_runtime_get(cdd->ddev.dev);
> - if (error < 0)
> + if ((error != -EINPROGRESS) && error < 0)
> dev_err(cdd->ddev.dev, "%s pm runtime get: %i\n",
> __func__, error);
>
> @@ -340,6 +343,11 @@ static irqreturn_t cppi41_irq(int irq, void *data)
> else
> len = pd_trans_len(c->desc->pd0);
>
> + /* This warning should never trigger */
> + spin_lock_irqsave(&cdd->lock, flags);
> + WARN_ON(cdd->is_suspended);
> + spin_unlock_irqrestore(&cdd->lock, flags);
> +
> c->residue = pd_trans_len(c->desc->pd6) - len;
> dma_cookie_complete(&c->txd);
> dmaengine_desc_get_callback_invoke(&c->txd, NULL);
Hmm this check needs to be before cppi41_pop_desc() already as that does
cppi_readl(). And the spinlocks here don't help anything, we just want
to see a warning if we hit a bug somewhere else.
Regards,
Tony
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