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crypto: nx - don't err if compressed output > input 

Return success instead of error if compression succeeds but the output is
larger than the input.

It's unlikely that the caller will use the compressed data since it's
larger than the original uncompressed data, but there was no error and
returning an error code is incorrect.  Further, for testing small input
buffers, the output is likely to be larger than the input and success
needs to be returned to verify the test.

Signed-off-by: Dan Streetman <ddstreet@ieee.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Dan Streetman 2015-07-29 19:42:09 -04:00 committed by Herbert Xu
parent caa8c50849
commit 7371c0a5c2
1 changed files with 5 additions and 2 deletions
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7
drivers/crypto/nx/nx-842-pseries.c
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@ -226,9 +226,12 @@ static int nx842_validate_result(struct device *dev,
switch (csb->completion_code) { switch (csb->completion_code) {
case 0: /* Completed without error */ case 0: /* Completed without error */
break; break;
case 64: /* Target bytes > Source bytes during compression */ case 64: /* Compression ok, but output larger than input */
dev_dbg(dev, "%s: output size larger than input size\n",
__func__);
break;
case 13: /* Output buffer too small */ case 13: /* Output buffer too small */
dev_dbg(dev, "%s: Compression output larger than input\n", dev_dbg(dev, "%s: Out of space in output buffer\n",
__func__); __func__);
return -ENOSPC; return -ENOSPC;
case 66: /* Input data contains an illegal template field */ case 66: /* Input data contains an illegal template field */