cryptodev-linux: Fix error when compiling with 5.4 kernel

Currently, cryptodev-linux fails to compile with a
'"crypto_givcipher_type" undefined' error for targets on the 5.4 kernel,
e.g. armvirt[1].

This backports an upstream patch[2] that fixes this error.

[1]: https://downloads.openwrt.org/snapshots/faillogs/aarch64_generic/base/cryptodev-linux/compile.txt
[2]: https://github.com/cryptodev-linux/cryptodev-linux/commit/f971e0cd4a0ebe59fb2e8e17240399bf6901b09b

Signed-off-by: Jeffery To <jeffery.to@gmail.com>

1 files changed, 50 insertions, 0 deletions

diff --git a/package/kernel/cryptodev-linux/patches/010-Fix-module-loading-with-Linux-v5.0-rc5.patch b/package/kernel/cryptodev-linux/patches/010-Fix-module-loading-with-Linux-v5.0-rc5.patch
new file mode 100644
index 0000000000..5909f6dfb3
--- /dev/null
+++ b/package/kernel/cryptodev-linux/patches/010-Fix-module-loading-with-Linux-v5.0-rc5.patch
@@ -0,0 +1,50 @@
+From f971e0cd4a0ebe59fb2e8e17240399bf6901b09b Mon Sep 17 00:00:00 2001
+From: "Derald D. Woods" <woods.technical@gmail.com>
+Date: Sun, 10 Feb 2019 13:22:19 -0600
+Subject: [PATCH] Fix module loading with Linux v5.0-rc5
+
+This commit fixes this module load error:
+[...]
+[   29.112091] cryptodev: loading out-of-tree module taints kernel.
+[   29.128906] cryptodev: Unknown symbol crypto_givcipher_type (err -2)
+[   29.188842] cryptodev: Unknown symbol crypto_givcipher_type (err -2)
+modprobe: can't load module cryptodev (extra/cryptodev.ko): unknown symbol in module, or unknown parameter
+[...]
+
+Upstream Linux support for unused GIVCIPHER, and others, was dropped here:
+
+c79b411eaa72 (crypto: skcipher - remove remnants of internal IV generators)
+
+Signed-off-by: Derald D. Woods <woods.technical@gmail.com>
+---
+ cryptlib.c | 9 +++++++--
+ 1 file changed, 7 insertions(+), 2 deletions(-)
+
+diff --git a/cryptlib.c b/cryptlib.c
+index 6e66698..4a87037 100644
+--- a/cryptlib.c
++++ b/cryptlib.c
+@@ -38,7 +38,9 @@
+ #include "cryptodev_int.h"
+ #include "cipherapi.h"
+ 
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 0, 0))
+ extern const struct crypto_type crypto_givcipher_type;
++#endif
+ 
+ static void cryptodev_complete(struct crypto_async_request *req, int err)
+ {
+@@ -157,8 +159,11 @@ int cryptodev_cipher_init(struct cipher_data *out, const char *alg_name,
+ 
+ #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 8, 0))
+ 		tfm = crypto_skcipher_tfm(out->async.s);
+-		if ((tfm->__crt_alg->cra_type == &crypto_ablkcipher_type) ||
+-		    (tfm->__crt_alg->cra_type == &crypto_givcipher_type)) {
++		if ((tfm->__crt_alg->cra_type == &crypto_ablkcipher_type)
++#if (LINUX_VERSION_CODE < KERNEL_VERSION(5, 0, 0))
++		    || (tfm->__crt_alg->cra_type == &crypto_givcipher_type)
++#endif
++							) {
+ 			struct ablkcipher_alg *alg;
+ 
+ 			alg = &tfm->__crt_alg->cra_ablkcipher;