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crypto: ccp - Account for CCP backlog processing 

When the crypto layer is able to queue up a command for processing
by the CCP on the initial call to ccp_crypto_enqueue_request and
the CCP returns -EBUSY, then if the backlog flag is not set the
command needs to be freed and not added to the active command list.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Tom Lendacky 2014-02-24 08:42:14 -06:00 committed by Herbert Xu
parent 950b10bae6
commit c65a52f836
1 changed files with 11 additions and 7 deletions
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18
drivers/crypto/ccp/ccp-crypto-main.c
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@ -205,6 +205,7 @@ static int ccp_crypto_enqueue_cmd(struct ccp_crypto_cmd *crypto_cmd)
{
struct ccp_crypto_cmd *active = NULL, *tmp;
unsigned long flags;
bool free_cmd = true;
int ret;
spin_lock_irqsave(&req_queue_lock, flags);
@ -231,7 +232,10 @@ static int ccp_crypto_enqueue_cmd(struct ccp_crypto_cmd *crypto_cmd)
if (!active) {
ret = ccp_enqueue_cmd(crypto_cmd->cmd);
if (!ccp_crypto_success(ret))
goto e_lock;
goto e_lock; /* Error, don't queue it */
if ((ret == -EBUSY) &&
!(crypto_cmd->cmd->flags & CCP_CMD_MAY_BACKLOG))
goto e_lock; /* Not backlogging, don't queue it */
}
if (req_queue.cmd_count >= CCP_CRYPTO_MAX_QLEN) {
@ -244,9 +248,14 @@ static int ccp_crypto_enqueue_cmd(struct ccp_crypto_cmd *crypto_cmd)
req_queue.cmd_count++;
list_add_tail(&crypto_cmd->entry, &req_queue.cmds);
free_cmd = false;
e_lock:
spin_unlock_irqrestore(&req_queue_lock, flags);
if (free_cmd)
kfree(crypto_cmd);
return ret;
}
@ -262,7 +271,6 @@ int ccp_crypto_enqueue_request(struct crypto_async_request *req,
{
struct ccp_crypto_cmd *crypto_cmd;
gfp_t gfp;
int ret;
gfp = req->flags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL : GFP_ATOMIC;
@ -287,11 +295,7 @@ int ccp_crypto_enqueue_request(struct crypto_async_request *req,
else
cmd->flags &= ~CCP_CMD_MAY_BACKLOG;
ret = ccp_crypto_enqueue_cmd(crypto_cmd);
if (!ccp_crypto_success(ret))
kfree(crypto_cmd);
return ret;
return ccp_crypto_enqueue_cmd(crypto_cmd);
}
struct scatterlist *ccp_crypto_sg_table_add(struct sg_table *table,