Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

Pull crypto fixes from Herbert Xu:
 "This fixes the following issues:

   - a bogus BUG_ON in ixp4xx that can be triggered by a dst buffer that
     is an SG list.

   - the error handling in hwrngd may cause a crash in case of an error.

   - fix a race condition in qat registration when multiple devices are
     present"

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  hwrng: core - correct error check of kthread_run call
  crypto: ixp4xx - Remove bogus BUG_ON on scattered dst buffer
  crypto: qat - Fix invalid synchronization between register/unregister sym algs

diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c
index da8faf78536a3ae01827a2ee9480c486a04297a5..5643b65cee204d950d842529e0a12123f57e92c0 100644 (file)
--- a/drivers/char/hw_random/core.c
+++ b/drivers/char/hw_random/core.c
@@ -429,7 +429,7 @@ static int hwrng_fillfn(void *unused)
 static void start_khwrngd(void)
 {
        hwrng_fill = kthread_run(hwrng_fillfn, NULL, "hwrng");
-       if (hwrng_fill == ERR_PTR(-ENOMEM)) {
+       if (IS_ERR(hwrng_fill)) {
                pr_err("hwrng_fill thread creation failed");
                hwrng_fill = NULL;
        }

diff --git a/drivers/crypto/ixp4xx_crypto.c b/drivers/crypto/ixp4xx_crypto.c
index 7ba495f7537042f898ef1cd7cdba7a6263f2059b..402631a19a112770af83f0f4228176703e1c0b44 100644 (file)
--- a/drivers/crypto/ixp4xx_crypto.c
+++ b/drivers/crypto/ixp4xx_crypto.c
@@ -905,7 +905,6 @@ static int ablk_perform(struct ablkcipher_request *req, int encrypt)
                crypt->mode |= NPE_OP_NOT_IN_PLACE;
                /* This was never tested by Intel
                 * for more than one dst buffer, I think. */
-               BUG_ON(req->dst->length < nbytes);
                req_ctx->dst = NULL;
                if (!chainup_buffers(dev, req->dst, nbytes, &dst_hook,
                                        flags, DMA_FROM_DEVICE))

diff --git a/drivers/crypto/qat/qat_common/qat_algs.c b/drivers/crypto/qat/qat_common/qat_algs.c
index 067402c7c2a93fdc02ca3242f918deba460dae91..df427c0e9e7b2c99c8ee6cbe0c91b98c1ff47c43 100644 (file)
--- a/drivers/crypto/qat/qat_common/qat_algs.c
+++ b/drivers/crypto/qat/qat_common/qat_algs.c
@@ -73,7 +73,8 @@
                                       ICP_QAT_HW_CIPHER_KEY_CONVERT, \
                                       ICP_QAT_HW_CIPHER_DECRYPT)
 
-static atomic_t active_dev;
+static DEFINE_MUTEX(algs_lock);
+static unsigned int active_devs;
 
 struct qat_alg_buf {
        uint32_t len;
@@ -1280,7 +1281,10 @@ static struct crypto_alg qat_algs[] = { {
 
 int qat_algs_register(void)
 {
-       if (atomic_add_return(1, &active_dev) == 1) {
+       int ret = 0;
+
+       mutex_lock(&algs_lock);
+       if (++active_devs == 1) {
                int i;
 
                for (i = 0; i < ARRAY_SIZE(qat_algs); i++)
@@ -1289,21 +1293,25 @@ int qat_algs_register(void)
                                CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC :
                                CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC;
 
-               return crypto_register_algs(qat_algs, ARRAY_SIZE(qat_algs));
+               ret = crypto_register_algs(qat_algs, ARRAY_SIZE(qat_algs));
        }
-       return 0;
+       mutex_unlock(&algs_lock);
+       return ret;
 }
 
 int qat_algs_unregister(void)
 {
-       if (atomic_sub_return(1, &active_dev) == 0)
-               return crypto_unregister_algs(qat_algs, ARRAY_SIZE(qat_algs));
-       return 0;
+       int ret = 0;
+
+       mutex_lock(&algs_lock);
+       if (--active_devs == 0)
+               ret = crypto_unregister_algs(qat_algs, ARRAY_SIZE(qat_algs));
+       mutex_unlock(&algs_lock);
+       return ret;
 }
 
 int qat_algs_init(void)
 {
-       atomic_set(&active_dev, 0);
        crypto_get_default_rng();
        return 0;
 }