Function of sahara_aes_crypt maybe could be called by function
of crypto_skcipher_encrypt during the rx softirq, so it is not
allowed to use mutex lock.
Signed-off-by: Zhengchao Shao <[email protected]>
---
This patch is not yet tested, compiled only.
---
drivers/crypto/sahara.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/drivers/crypto/sahara.c b/drivers/crypto/sahara.c
index 457084b344c1..b07ae4ba165e 100644
--- a/drivers/crypto/sahara.c
+++ b/drivers/crypto/sahara.c
@@ -26,10 +26,10 @@
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <linux/module.h>
-#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
+#include <linux/spinlock.h>
#define SHA_BUFFER_LEN PAGE_SIZE
#define SAHARA_MAX_SHA_BLOCK_SIZE SHA256_BLOCK_SIZE
@@ -196,7 +196,7 @@ struct sahara_dev {
void __iomem *regs_base;
struct clk *clk_ipg;
struct clk *clk_ahb;
- struct mutex queue_mutex;
+ spinlock_t queue_spinlock;
struct task_struct *kthread;
struct completion dma_completion;
@@ -642,9 +642,9 @@ static int sahara_aes_crypt(struct skcipher_request *req, unsigned long mode)
rctx->mode = mode;
- mutex_lock(&dev->queue_mutex);
+ spin_lock_bh(&dev->queue_spinlock);
err = crypto_enqueue_request(&dev->queue, &req->base);
- mutex_unlock(&dev->queue_mutex);
+ spin_unlock_bh(&dev->queue_spinlock);
wake_up_process(dev->kthread);
@@ -1043,10 +1043,10 @@ static int sahara_queue_manage(void *data)
do {
__set_current_state(TASK_INTERRUPTIBLE);
- mutex_lock(&dev->queue_mutex);
+ spin_lock_bh(&dev->queue_spinlock);
backlog = crypto_get_backlog(&dev->queue);
async_req = crypto_dequeue_request(&dev->queue);
- mutex_unlock(&dev->queue_mutex);
+ spin_unlock_bh(&dev->queue_spinlock);
if (backlog)
backlog->complete(backlog, -EINPROGRESS);
@@ -1092,9 +1092,9 @@ static int sahara_sha_enqueue(struct ahash_request *req, int last)
rctx->first = 1;
}
- mutex_lock(&dev->queue_mutex);
+ spin_lock_bh(&dev->queue_spinlock);
ret = crypto_enqueue_request(&dev->queue, &req->base);
- mutex_unlock(&dev->queue_mutex);
+ spin_unlock_bh(&dev->queue_spinlock);
wake_up_process(dev->kthread);
@@ -1449,7 +1449,7 @@ static int sahara_probe(struct platform_device *pdev)
crypto_init_queue(&dev->queue, SAHARA_QUEUE_LENGTH);
- mutex_init(&dev->queue_mutex);
+ spin_lock_init(&dev->queue_spinlock);
dev_ptr = dev;
--
2.17.1