[U-Boot] [PATCH] cmd: env: Fix CRC calculation for 'env export -c -s'

[Neil Stainton]

Fix failure to reimport exported checksummed, size constrained data block.

'env export -c' command ignores optional -s size argument when calculating checksum causing subsequent 'env import -c' to fail.

Signed-off-by: Neil Stainton <nstainton at asl-control.co.uk>

---
 cmd/nvedit.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/cmd/nvedit.c b/cmd/nvedit.c
index ddc888a..600c38b 100644
--- a/cmd/nvedit.c
+++ b/cmd/nvedit.c
@@ -984,7 +984,8 @@ NXTARG:             ;
        }
 
        if (chk) {
-               envp->crc = crc32(0, envp->data, ENV_SIZE);
+               envp->crc = crc32(0, envp->data,
+                       size ? size - offsetof(env_t, data) : ENV_SIZE);
 #ifdef CONFIG_ENV_ADDR_REDUND
                envp->flags = ACTIVE_FLAG;
 #endif
--
2.7.4