tree eccc3beb0adf527562a4ea61d5aafccea919c24a
parent 32e67b9af077e905388f1746bf429ea0c39b6917
author Stephan Mueller <smueller@chronox.de> 1502376003 +0200
committer Herbert Xu <herbert@gondor.apana.org.au> 1503385407 +0800

crypto: af_alg - get_page upon reassignment to TX SGL

When a page is assigned to a TX SGL, call get_page to increment the
reference counter. It is possible that one page is referenced in
multiple SGLs:

- in the global TX SGL in case a previous af_alg_pull_tsgl only
reassigned parts of a page to a per-request TX SGL

- in the per-request TX SGL as assigned by af_alg_pull_tsgl

Note, multiple requests can be active at the same time whose TX SGLs all
point to different parts of the same page.

Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>