diff options
| author | Leah Rowe <leah@libreboot.org> | 2023-06-01 12:21:55 +0100 |
|---|---|---|
| committer | Leah Rowe <leah@libreboot.org> | 2023-06-01 12:21:55 +0100 |
| commit | b49da12dad4916a5678e35b1909bdc529a6d8474 (patch) | |
| tree | 7c356fb265fa2b8ab81ec6dfd5dd4d0b578041dc /util/nvmutil/nvmutil.c | |
| parent | 9aa34f1e20263c8b25d4865f3b68db2e985ce5d8 (diff) | |
util/nvmutil: only swap/copy if checksum is valid
in practise, the file was never written unless the checksum
was valid, but in the same of sloccount reduction i made it
do the swap/copy before checking. while functionally ok, it
never sat right with me. this is one example of where sloc
count doesn't mean everything. code correctness is critical
Signed-off-by: Leah Rowe <leah@libreboot.org>
Diffstat (limited to 'util/nvmutil/nvmutil.c')
| -rw-r--r-- | util/nvmutil/nvmutil.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/util/nvmutil/nvmutil.c b/util/nvmutil/nvmutil.c index 3a050644..77b33aa2 100644 --- a/util/nvmutil/nvmutil.c +++ b/util/nvmutil/nvmutil.c @@ -205,16 +205,18 @@ cmd_brick(void) void cmd_swap(void) { - xorswap(gbe[0], gbe[1]); /* speedhack: swap ptr, not words */ gbeFileModified = nvmPartModified[0] = nvmPartModified[1] = validChecksum(1) | validChecksum(0); + if (gbeFileModified) + xorswap(gbe[0], gbe[1]); /* speedhack: swap ptr, not words */ } void cmd_copy(void) { - gbe[part ^ 1] = gbe[part]; /* speedhack: copy ptr, not words */ gbeFileModified = nvmPartModified[part ^ 1] = validChecksum(part); + if (gbeFileModified) + gbe[part ^ 1] = gbe[part]; /* speedhack: copy ptr, not words */ } int |