From: Mike Corrigan <michael.corrigan@motorola.com>
Date: Thu, 14 Oct 2010 18:56:13 +0000 (-0500)
Subject: [arm]: tegra: dma: DMA error debugging.
X-Git-Tag: firefly_0821_release~9833^2~153^2~1
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=43ca7cdda2e511be7d19c3bdbc437e471b7e8f7e;p=firefly-linux-kernel-4.4.55.git

[arm]: tegra: dma: DMA error debugging.

Print an error message when a DMA channel cannot be allocated.

Change-Id: I93a96851ac12c5ea66b2fb053033aa4260c2178a
Signed-off-by: Mike Corrigan <michael.corrigan@motorola.com>
---

diff --git a/arch/arm/mach-tegra/dma.c b/arch/arm/mach-tegra/dma.c
index 87309818d254..163993bfa816 100644
--- a/arch/arm/mach-tegra/dma.c
+++ b/arch/arm/mach-tegra/dma.c
@@ -341,7 +341,7 @@ EXPORT_SYMBOL(tegra_dma_enqueue_req);
 struct tegra_dma_channel *tegra_dma_allocate_channel(int mode)
 {
 	int channel;
-	struct tegra_dma_channel *ch = NULL;;
+	struct tegra_dma_channel *ch = NULL;
 
 	mutex_lock(&tegra_dma_lock);
 
@@ -351,8 +351,10 @@ struct tegra_dma_channel *tegra_dma_allocate_channel(int mode)
 	} else {
 		channel = find_first_zero_bit(channel_usage,
 			ARRAY_SIZE(dma_channels));
-		if (channel >= ARRAY_SIZE(dma_channels))
+		if (channel >= ARRAY_SIZE(dma_channels)) {
+			pr_err("%s: failed to allocate a DMA channel",__func__);
 			goto out;
+		}
 	}
 	__set_bit(channel, channel_usage);
 	ch = &dma_channels[channel];