[PATCH] Fix cryptoapi deflate not handling PAGE_SIZE chunks.

[Nigel Cunningham]

Hi Herbert.

Here's a resend of a patch I'm using in Suspend2's new cryptoapi
support, which is needed for us to successfully compress pages using
deflate. It's along the lines of the existing fix in the decompression
code.

Regards,

Nigel

diff -ruNp 190-cryptoapi-deflate.patch-old/crypto/deflate.c 190-cryptoapi-deflate.patch-new/crypto/deflate.c
--- 190-cryptoapi-deflate.patch-old/crypto/deflate.c	2005-06-20 11:46:49.000000000 +1000
+++ 190-cryptoapi-deflate.patch-new/crypto/deflate.c	2005-07-04 23:14:20.000000000 +1000
@@ -143,8 +143,15 @@ static int deflate_compress(void *ctx, c
 
 	ret = zlib_deflate(stream, Z_FINISH);
 	if (ret != Z_STREAM_END) {
-		ret = -EINVAL;
-		goto out;
+	    	if (!(ret == Z_OK && !stream->avail_in && !stream->avail_out)) {
+			ret = -EINVAL;
+			goto out;
+		} else {
+			u8 zerostuff = 0;
+			stream->next_out = &zerostuff;
+			stream->avail_out = 1; 
+			ret = zlib_deflate(stream, Z_FINISH);
+		}
 	}
 	ret = 0;
 	*dlen = stream->total_out;

-- 
Evolution.
Enumerate the requirements.
Consider the interdependencies.
Calculate the probabilities.
Be amazed that people believe it happened. 

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/