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pstore/ram: Include ecc_size when calculating ecc_block 

Wastes less memory and allows using more memory for ecc than data.

Signed-off-by: Arve Hjønnevåg <arve@android.com>
[jstultz: Tweaked commit subject]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Anton Vorontsov <anton@enomsg.org>
This commit is contained in:
Arve Hjønnevåg 2012-03-20 16:01:31 -07:00 committed by Anton Vorontsov
parent c53026722b
commit 422ca8608c
1 changed files with 2 additions and 1 deletions
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3
fs/pstore/ram_core.c
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@ -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",