Thread (15 messages) 15 messages, 3 authors, 2014-03-11

[PATCH v4 6/7] DMA: sun6i: Add driver for the Allwinner A31 DMA controller

From: Shevchenko, Andriy <hidden>
Date: 2014-03-11 10:23:45
Also in: linux-devicetree, lkml

On Tue, 2014-03-11 at 11:08 +0100, Maxime Ripard wrote:

[]
quoted
quoted
+	spin_lock_irq(&sdev->lock);
+	for (pchan_idx = 0; pchan_idx < NR_MAX_CHANNELS; pchan_idx++) {
+		pchan = &sdev->pchans[pchan_idx];
+
+		if (pchan->vchan == NULL && !list_empty(&sdev->pending)) {
!pchan->vchan && ...
Ok.
quoted
And you may decrease indentation level here if you use negative
condition.
Hmmm, I'm not following you here. What do you mean?
for () {
...
if (!(your current condition))
 continue;
... (do something else with decreased indentation level)
}
quoted
quoted
+			vchan = list_first_entry(&sdev->pending,
+						 struct sun6i_vchan, node);
+
+			/* Remove from pending channels */
+			list_del_init(&vchan->node);
+			pchan_alloc |= BIT(pchan_idx);
+
+			/* Mark this channel allocated */
+			pchan->vchan = vchan;
+			vchan->phy = pchan;
+			dev_dbg(sdev->slave.dev, "pchan %u: alloc vchan %p\n",
+				pchan->idx, &vchan->vc);
+		}
+	}
+	spin_unlock_irq(&sdev->lock);
+
+	for (pchan_idx = 0; pchan_idx < NR_MAX_CHANNELS; pchan_idx++) {
+		if (pchan_alloc & BIT(pchan_idx)) {
Ditto.
Same here.

[]
quoted
quoted
+#ifdef DEBUG
+	dev_dbg(chan2dev(chan), "First: %pad\n", &txd->p_lli);
dev_dbg is aware of DEBUG. So, please, remove that #ifdef at all.
Yep, but the line just below isn't.

The ifdef here is not really to prevent the call to dev_dbg, but rather...
quoted
quoted
+	for (prev = txd->v_lli; prev != NULL; prev = prev->v_lli_next)
... this.
It doesn't matter since implementation of sun6i_dma_dump_lli is (and
actually should be) aware of DEBUG already, because it's dev_dbg based.
quoted
You may remove '!= NULL' part.
Ok.
quoted
quoted
+		sun6i_dma_dump_lli(vchan, prev);
+#endif



-- 
Andy Shevchenko [off-list ref]
Intel Finland Oy
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