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crypto: ccp - Perform completion callbacks using a tasklet 

Change from scheduling work to scheduling a tasklet to perform
the callback operations.

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 2014-01-24 16:18:14 -06:00 committed by Herbert Xu
parent bc3854476f
commit 530abd8938
1 changed files with 17 additions and 4 deletions
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21
drivers/crypto/ccp/ccp-dev.c
View File

@ -30,6 +30,11 @@ MODULE_LICENSE("GPL");
MODULE_VERSION("1.0.0");
MODULE_DESCRIPTION("AMD Cryptographic Coprocessor driver");
struct ccp_tasklet_data {
struct completion completion;
struct ccp_cmd *cmd;
};
static struct ccp_device *ccp_dev;
static inline struct ccp_device *ccp_get_device(void)
@ -192,17 +197,23 @@ static struct ccp_cmd *ccp_dequeue_cmd(struct ccp_cmd_queue *cmd_q)
return cmd;
}
static void ccp_do_cmd_complete(struct work_struct *work)
static void ccp_do_cmd_complete(unsigned long data)
{
struct ccp_cmd *cmd = container_of(work, struct ccp_cmd, work);
struct ccp_tasklet_data *tdata = (struct ccp_tasklet_data *)data;
struct ccp_cmd *cmd = tdata->cmd;
cmd->callback(cmd->data, cmd->ret);
complete(&tdata->completion);
}
static int ccp_cmd_queue_thread(void *data)
{
struct ccp_cmd_queue *cmd_q = (struct ccp_cmd_queue *)data;
struct ccp_cmd *cmd;
struct ccp_tasklet_data tdata;
struct tasklet_struct tasklet;
tasklet_init(&tasklet, ccp_do_cmd_complete, (unsigned long)&tdata);
set_current_state(TASK_INTERRUPTIBLE);
while (!kthread_should_stop()) {
@ -220,8 +231,10 @@ static int ccp_cmd_queue_thread(void *data)
cmd->ret = ccp_run_cmd(cmd_q, cmd);
/* Schedule the completion callback */
INIT_WORK(&cmd->work, ccp_do_cmd_complete);
schedule_work(&cmd->work);
tdata.cmd = cmd;
init_completion(&tdata.completion);
tasklet_schedule(&tasklet);
wait_for_completion(&tdata.completion);
}
__set_current_state(TASK_RUNNING);