From: Danny Wood <danwood76@gmail.com>
Date: Fri, 3 May 2019 08:57:38 +0000 (+0100)
Subject: dma: dmaengine: Do not skip opening a 'busy' DMA channel as it crashes the kernel... 
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=8f0e65204b80ad15a8bdbf1468ed9b264058985e;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

dma: dmaengine: Do not skip opening a 'busy' DMA channel as it crashes the kernel and doesn't seem to be necessary
---

diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 18cb0f83bdb..8fc2415e328 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -494,9 +494,10 @@ static struct dma_chan *private_candidate(const dma_cap_mask_t *mask,
 
 	list_for_each_entry(chan, &dev->channels, device_node) {
 		if (chan->client_count) {
-			pr_debug("%s: %s busy\n",
-				 __func__, dma_chan_name(chan));
-			continue;
+		    pr_debug("%s: %s busy (%i)\n",
+				 __func__, dma_chan_name(chan), chan->client_count);
+			/* Skipping "busy" DMA channels crashes the kernel, seems to work fine without skipping */
+			//continue;
 		}
 		if (fn && !fn(chan, fn_param)) {
 			pr_debug("%s: %s filter said false\n",