initrd: fix lz4 decompress with initrd
authorYinghai Lu <yinghai@kernel.org>
Fri, 8 Aug 2014 21:23:10 +0000 (14:23 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 8 Aug 2014 22:57:26 +0000 (15:57 -0700)
commit4d4b866aee039d609c0b40e7e5b27204607ce614
tree518c9d3b9e62fcc04669363e9f9235a39872d536
parentfa5a7a41a601d952e53bfcfa6d50ca22b956ee3a
initrd: fix lz4 decompress with initrd

During testing initrd (>2G) support, find decompress/lz4 does not work
with initrd at all.

decompress_* should support:
1. inbuf[]/outbuf[] for kernel preboot.
2. inbuf[]/flush() for initramfs
3. fill()/flush() for initrd.

in the unlz4 does not handle case 3, as input len is passed as 0, and it
failed in first try.

Fix that add one extra if (fill) checking, and get out if EOF from the
fill().

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Kyungsik Lee <kyungsik.lee@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
lib/decompress_unlz4.c