openwrt/target/linux/generic/pending-4.19/420-mtd-redboot_space.patch

From: Felix Fietkau <nbd@nbd.name>
Subject: add patch for including unpartitioned space in the rootfs partition for redboot devices (if applicable)

[john@phrozen.org: used by ixp and others]

lede-commit: 394918851f84e4d00fa16eb900e7700e95091f00
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 drivers/mtd/redboot.c | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

--- a/drivers/mtd/redboot.c
+++ b/drivers/mtd/redboot.c
@@ -265,14 +265,21 @@ static int parse_redboot_partitions(stru
 #endif
 		names += strlen(names)+1;
 
-#ifdef CONFIG_MTD_REDBOOT_PARTS_UNALLOCATED
 		if(fl->next && fl->img->flash_base + fl->img->size + master->erasesize <= fl->next->img->flash_base) {
-			i++;
-			parts[i].offset = parts[i-1].size + parts[i-1].offset;
-			parts[i].size = fl->next->img->flash_base - parts[i].offset;
-			parts[i].name = nullname;
-		}
+			if (!strcmp(parts[i].name, "rootfs")) {
+				parts[i].size = fl->next->img->flash_base;
+				parts[i].size &= ~(master->erasesize - 1);
+				parts[i].size -= parts[i].offset;
+#ifdef CONFIG_MTD_REDBOOT_PARTS_UNALLOCATED
+				nrparts--;
+			} else {
+				i++;
+				parts[i].offset = parts[i-1].size + parts[i-1].offset;
+				parts[i].size = fl->next->img->flash_base - parts[i].offset;
+				parts[i].name = nullname;
 #endif
+			}
+		}
 		tmp_fl = fl;
 		fl = fl->next;
 		kfree(tmp_fl);