---

yaml --- r: 148579 b: refs/heads/master c: ea8538a h: refs/heads/master i: 148577: 36834b8 148575: 9b2e52e v: v3
git-mirror · Jun 12, 2009 · 6841100 · 6841100
1 parent 61eea91
commit 6841100
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Showing 2 changed files with 8 additions and 2 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 9b9bfded623cffb4259b95e5419404015dba361f
+refs/heads/master: ea8538a039607cd959d28ed10086484e051ce7db
diff --git a/trunk/arch/blackfin/include/asm/dma.h b/trunk/arch/blackfin/include/asm/dma.h
@@ -206,10 +206,16 @@ static inline unsigned long get_dma_curr_addr(unsigned int channel)
 
 static inline void set_dma_sg(unsigned int channel, struct dmasg *sg, int ndsize)
 {
+	/* Make sure the internal data buffers in the core are drained
+	 * so that the DMA descriptors are completely written when the
+	 * DMA engine goes to fetch them below.
+	 */
+	SSYNC();
+
+	dma_ch[channel].regs->next_desc_ptr = sg;
 	dma_ch[channel].regs->cfg =
 		(dma_ch[channel].regs->cfg & ~(0xf << 8)) |
 		((ndsize & 0xf) << 8);
-	dma_ch[channel].regs->next_desc_ptr = sg;
 }
 
 static inline int dma_channel_active(unsigned int channel)