File 0019-uboot-fs-btrfs-Use-LZO_LEN-to-repla.patch of Package u-boot

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File 0019-uboot-fs-btrfs-Use-LZO_LEN-to-repla.patch of Package u-boot (Revision 7664e5bdaa7597692fd4a580c6ed30cc)

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From 528169a95fac4edbc0935796d919876b1c64b204 Mon Sep 17 00:00:00 2001
From: Qu Wenruo <wqu@suse.com>
Date: Thu, 19 Mar 2020 20:30:05 +0800
Subject: [PATCH] uboot: fs/btrfs: Use LZO_LEN to replace immediate number

Just a cleanup. The immediate number makes my eye hurt.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
---
 fs/btrfs/compression.c | 22 ++++++++++++----------
 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index 346875d45a..4ef44ce114 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -12,36 +12,38 @@
 #include <u-boot/zlib.h>
 #include <asm/unaligned.h>
 
+/* Header for each segment, LE32, recording the compressed size */
+#define LZO_LEN		4
 static u32 decompress_lzo(const u8 *cbuf, u32 clen, u8 *dbuf, u32 dlen)
 {
 	u32 tot_len, in_len, res;
 	size_t out_len;
 	int ret;
 
-	if (clen < 4)
+	if (clen < LZO_LEN)
 		return -1;
 
 	tot_len = le32_to_cpu(get_unaligned((u32 *)cbuf));
-	cbuf += 4;
-	clen -= 4;
-	tot_len -= 4;
+	cbuf += LZO_LEN;
+	clen -= LZO_LEN;
+	tot_len -= LZO_LEN;
 
 	if (tot_len == 0 && dlen)
 		return -1;
-	if (tot_len < 4)
+	if (tot_len < LZO_LEN)
 		return -1;
 
 	res = 0;
 
-	while (tot_len > 4) {
+	while (tot_len > LZO_LEN) {
 		in_len = le32_to_cpu(get_unaligned((u32 *)cbuf));
-		cbuf += 4;
-		clen -= 4;
+		cbuf += LZO_LEN;
+		clen -= LZO_LEN;
 
-		if (in_len > clen || tot_len < 4 + in_len)
+		if (in_len > clen || tot_len < LZO_LEN + in_len)
 			return -1;
 
-		tot_len -= 4 + in_len;
+		tot_len -= (LZO_LEN + in_len);
 
 		out_len = dlen;
 		ret = lzo1x_decompress_safe(cbuf, in_len, dbuf, &out_len);

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File 0019-uboot-fs-btrfs-Use-LZO_LEN-to-repla.patch of Package u-boot (Revision 7664e5bdaa7597692fd4a580c6ed30cc)

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