s390/crypto: fix gcm-aes-s390 selftest failures
commit bef9f0ba300a55d79a69aa172156072182176515 upstream. The current kernel uses improved crypto selftests. These tests showed that the current implementation of gcm-aes-s390 is not able to deal with chunks of output buffers which are not a multiple of 16 bytes. This patch introduces a rework of the gcm aes s390 scatter walk handling which now is able to handle any input and output scatter list chunk sizes correctly. Code has been verified by the crypto selftests, the tcrypt kernel module and additional tests ran via the af_alg interface. Cc: <stable@vger.kernel.org> Reported-by: NJulian Wiedmann <jwi@linux.ibm.com> Reviewed-by: NPatrick Steuer <steuer@linux.ibm.com> Signed-off-by: NHarald Freudenberger <freude@linux.ibm.com> Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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