[PATCH 3.16 070/328] ALSA: cs5535audio: Fix invalid endian conversion

Ben Hutchings
2018-12-09T22:04:27Z

From: Takashi Iwai <tiwai@suse.de>

commit 69756930f2de0457d51db7d505a1e4f40e9fd116 upstream.

One place in cs5535audio_build_dma_packets() does an extra conversion
via cpu_to_le32(); namely jmpprd_addr is passed to setup_prd() ops,
which writes the value via cs_writel(). That is, the callback does
the conversion by itself, and we don't need to convert beforehand.

This patch fixes that bogus conversion.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
sound/pci/cs5535audio/cs5535audio.h | 6 +++---
sound/pci/cs5535audio/cs5535audio_pcm.c | 4 ++--
2 files changed, 5 insertions(+), 5 deletions(-)

--- a/sound/pci/cs5535audio/cs5535audio.h
+++ b/sound/pci/cs5535audio/cs5535audio.h
@@ -66,9 +66,9 @@ struct cs5535audio_dma_ops {
};

struct cs5535audio_dma_desc {
- u32 addr;
- u16 size;
- u16 ctlreserved;
+ __le32 addr;
+ __le16 size;
+ __le16 ctlreserved;
};

struct cs5535audio_dma {
--- a/sound/pci/cs5535audio/cs5535audio_pcm.c
+++ b/sound/pci/cs5535audio/cs5535audio_pcm.c
@@ -158,8 +158,8 @@ static int cs5535audio_build_dma_packets
lastdesc->addr = cpu_to_le32((u32) dma->desc_buf.addr);
lastdesc->size = 0;
lastdesc->ctlreserved = cpu_to_le16(PRD_JMP);
- jmpprd_addr = cpu_to_le32(lastdesc->addr +
- (sizeof(struct cs5535audio_dma_desc)*periods));
+ jmpprd_addr = (u32)dma->desc_buf.addr +
+ sizeof(struct cs5535audio_dma_desc) * periods;

dma->substream = substream;
dma->period_bytes = period_bytes;