Reported by Clang [-Wunused-but-set-variable]

The variable 'desc_addr' is introduced in this commit
'commit 9b4ffa48ae85 ("[ALSA] Add support for the CS5535 Audio device")'

However, since introduced it was just iterated and never been used.
Remove it for code cleaning.

Signed-off-by: Chen Zhongjin <chenzhongjin@huawei.com>
---
 sound/pci/cs5535audio/cs5535audio_pcm.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/sound/pci/cs5535audio/cs5535audio_pcm.c b/sound/pci/cs5535audio/cs5535audio_pcm.c
index 0db24cc4d916..9c88e99e3750 100644
--- a/sound/pci/cs5535audio/cs5535audio_pcm.c
+++ b/sound/pci/cs5535audio/cs5535audio_pcm.c
@@ -110,7 +110,7 @@ static int cs5535audio_build_dma_packets(struct cs5535audio *cs5535au,
 					 unsigned int period_bytes)
 {
 	unsigned int i;
-	u32 addr, desc_addr, jmpprd_addr;
+	u32 addr, jmpprd_addr;
 	struct cs5535audio_dma_desc *lastdesc;
 
 	if (periods > CS5535AUDIO_MAX_DESCRIPTORS)
@@ -131,14 +131,12 @@ static int cs5535audio_build_dma_packets(struct cs5535audio *cs5535au,
 	/* the u32 cast is okay because in snd*create we successfully told
 	   pci alloc that we're only 32 bit capable so the upper will be 0 */
 	addr = (u32) substream->runtime->dma_addr;
-	desc_addr = (u32) dma->desc_buf.addr;
 	for (i = 0; i < periods; i++) {
 		struct cs5535audio_dma_desc *desc =
 			&((struct cs5535audio_dma_desc *) dma->desc_buf.area)[i];
 		desc->addr = cpu_to_le32(addr);
 		desc->size = cpu_to_le16(period_bytes);
 		desc->ctlreserved = cpu_to_le16(PRD_EOP);
-		desc_addr += sizeof(struct cs5535audio_dma_desc);
 		addr += period_bytes;
 	}
 	/* we reserved one dummy descriptor at the end to do the PRD jump */
-- 
2.17.1