From bedc357217e6e09623f6209c891fa8d57a737ac1 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Thu, 2 Jun 2022 12:09:35 +0300
Subject: [PATCH] ASoC: SOF: ipc-msg-injector: Fix reversed if statement
Git-commit: bedc357217e6e09623f6209c891fa8d57a737ac1
Patch-mainline: v5.19-rc2
References: jsc#PED-850

This if statement is reversed.  In fact, the condition can just be
deleted because writing zero bytes is a no-op.

Fixes: 066c67624d8c ("ASoC: SOF: ipc-msg-injector: Add support for IPC4 messages")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://lore.kernel.org/r/Yph+T3PpGCdPsEDj@kili
Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 sound/soc/sof/sof-client-ipc-msg-injector.c | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

diff --git a/sound/soc/sof/sof-client-ipc-msg-injector.c b/sound/soc/sof/sof-client-ipc-msg-injector.c
index 030cb97d7713..6bdfa527b7f7 100644
--- a/sound/soc/sof/sof-client-ipc-msg-injector.c
+++ b/sound/soc/sof/sof-client-ipc-msg-injector.c
@@ -200,16 +200,14 @@ static ssize_t sof_msg_inject_ipc4_dfs_write(struct file *file,
 		return -EFAULT;
 
 	count -= size;
-	if (!count) {
-		/* Copy the payload */
-		size = simple_write_to_buffer(ipc4_msg->data_ptr,
-					      priv->max_msg_size, ppos, buffer,
-					      count);
-		if (size < 0)
-			return size;
-		if (size != count)
-			return -EFAULT;
-	}
+	/* Copy the payload */
+	size = simple_write_to_buffer(ipc4_msg->data_ptr,
+				      priv->max_msg_size, ppos, buffer,
+				      count);
+	if (size < 0)
+		return size;
+	if (size != count)
+		return -EFAULT;
 
 	ipc4_msg->data_size = count;
 
-- 
2.35.3