From: Arve Hjønnevåg <a...@android.com>
Wastes less memory and allows using more memory for ecc than data.
Signed-off-by: Arve Hjønnevåg <a...@android.com>
[jstultz: Tweaked commit subject]
Signed-off-by: John Stultz <john.stu...@linaro.org>
Signed-off-by: Anton Vorontsov <an...@enomsg.org>
---
fs/pstore/ram_core.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/pstore/ram_core.c b/fs/pstore/ram_core.c
index 0306303..e5afa22 100644
--- a/fs/pstore/ram_core.c
+++ b/fs/pstore/ram_core.c
@@ -187,7 +187,8 @@ static int persistent_ram_init_ecc(struct
persistent_ram_zone *prz,
prz->ecc_block_size = 128;
prz->ecc_size = ecc_size;
- ecc_blocks = DIV_ROUND_UP(prz->buffer_size, prz->ecc_block_size);
+ ecc_blocks = DIV_ROUND_UP(prz->buffer_size - prz->ecc_size,
+ prz->ecc_block_size + prz->ecc_size);
ecc_total = (ecc_blocks + 1) * prz->ecc_size;
if (ecc_total >= prz->buffer_size) {
pr_err("%s: invalid ecc_size %u (total %zu, buffer size %zu)\n",
--
1.8.1.4
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