bootm: improve error message when gzip decompression buffer is too small
Currently, when decompressing a gzip-compressed image during bootm, a
generic error such as "inflate() returned -5" is shown when the buffer is
too small. However, it is not immediately clear that this is caused by
CONFIG_SYS_BOOTM_LEN being too small.
This patch improves error handling by:
- Detecting Z_BUF_ERROR (-5) returned from the inflate() call
- Suggesting the user to increase CONFIG_SYS_BOOTM_LEN when applicable
- Preserving the original return code from zunzip() instead of overwriting
it with -1
By providing clearer hints when decompression fails due to insufficient
buffer size, this change helps users diagnose and fix boot failures more
easily.
Signed-off-by: Aristo Chen <aristo.chen@canonical.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@kernel.org>
diff --git a/lib/gunzip.c b/lib/gunzip.c
index 5200771..a05dcde 100644
--- a/lib/gunzip.c
+++ b/lib/gunzip.c
@@ -299,7 +299,7 @@
if (stoponerr == 1 && r != Z_STREAM_END &&
(s.avail_in == 0 || s.avail_out == 0 || r != Z_BUF_ERROR)) {
printf("Error: inflate() returned %d\n", r);
- err = -1;
+ err = r;
break;
}
} while (r == Z_BUF_ERROR);