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ath79: fix FIS partition detection for 4.19 kernel

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When bumping to 4.19 the patch responsible for scaning flash for FIS
partition got left out. Without it devices with RedBoot bootloader using
automatic partitions detection in dts won't boot with the new kernel.

Fixes: 3771176 ("ath79: add support for linux 4.19")
Signed-off-by: Tomasz Maciej Nowak <tomek_n@o2.pl>
This commit is contained in:
Tomasz Maciej Nowak 2019-08-23 15:50:51 +02:00 committed by Christian Lamparter
parent a45cf75eca
commit 0bf6a531c2
1 changed files with 44 additions and 0 deletions
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44
target/linux/ath79/patches-4.19/408-mtd-redboot_partition_scan.patch Normal file
View File

@ -0,0 +1,44 @@
--- a/drivers/mtd/redboot.c
+++ b/drivers/mtd/redboot.c
@@ -76,12 +76,18 @@ static int parse_redboot_partitions(stru
static char nullstring[] = "unallocated";
#endif
+ buf = vmalloc(master->erasesize);
+ if (!buf)
+ return -ENOMEM;
+
+ restart:
if ( directory < 0 ) {
offset = master->size + directory * master->erasesize;
while (mtd_block_isbad(master, offset)) {
if (!offset) {
nogood:
printk(KERN_NOTICE "Failed to find a non-bad block to check for RedBoot partition table\n");
+ vfree(buf);
return -EIO;
}
offset -= master->erasesize;
@@ -94,10 +100,6 @@ static int parse_redboot_partitions(stru
goto nogood;
}
}
- buf = vmalloc(master->erasesize);
-
- if (!buf)
- return -ENOMEM;
printk(KERN_NOTICE "Searching for RedBoot partition table in %s at offset 0x%lx\n",
master->name, offset);
@@ -170,6 +172,11 @@ static int parse_redboot_partitions(stru
}
if (i == numslots) {
/* Didn't find it */
+ if (offset + master->erasesize < master->size) {
+ /* not at the end of the flash yet, maybe next block :) */
+ directory++;
+ goto restart;
+ }
printk(KERN_NOTICE "No RedBoot partition table detected in %s\n",
master->name);
ret = 0;