Reduce realloc syscall overhead for FT2232 and bitbang

FT2232 ran realloc() for every executed command. Start with a big enough
buffer and don't touch buffer size unless it needs to grow.
Bitbang was slightly better: It only ran realloc() if buffer size
changed. Still, the solution above improves performance and reliability.

Corresponding to flashrom svn r780.

Signed-off-by: Carl-Daniel Hailfinger <>
Acked-by: Sean Nelson <>
2 files changed