crypto: ccp - Use only the relevant interrupt bits

Each CCP queue can product interrupts for 4 conditions:
operation complete, queue empty, error, and queue stopped.
This driver only works with completion and error events.

Cc: <stable@vger.kernel.org> # 4.9.x+
Signed-off-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/ccp/ccp-dev-v5.c b/drivers/crypto/ccp/ccp-dev-v5.c
index e03d06a..c7972e7 100644 (file)
--- a/drivers/crypto/ccp/ccp-dev-v5.c
+++ b/drivers/crypto/ccp/ccp-dev-v5.c
@@ -801,7 +801,7 @@ static int ccp5_init(struct ccp_device *ccp)
                ioread32(cmd_q->reg_status);
 
                /* Clear the interrupts */
-               iowrite32(ALL_INTERRUPTS, cmd_q->reg_interrupt_status);
+               iowrite32(SUPPORTED_INTERRUPTS, cmd_q->reg_interrupt_status);
        }
 
        dev_dbg(dev, "Requesting an IRQ...\n");
@@ -882,7 +882,7 @@ static int ccp5_init(struct ccp_device *ccp)
        /* Enable interrupts */
        for (i = 0; i < ccp->cmd_q_count; i++) {
                cmd_q = &ccp->cmd_q[i];
-               iowrite32(ALL_INTERRUPTS, cmd_q->reg_int_enable);
+               iowrite32(SUPPORTED_INTERRUPTS, cmd_q->reg_int_enable);
        }
 
        dev_dbg(dev, "Registering device...\n");
@@ -942,7 +942,7 @@ static void ccp5_destroy(struct ccp_device *ccp)
                iowrite32(cmd_q->qcontrol & ~CMD5_Q_RUN, cmd_q->reg_control);
 
                /* Disable the interrupts */
-               iowrite32(ALL_INTERRUPTS, cmd_q->reg_interrupt_status);
+               iowrite32(SUPPORTED_INTERRUPTS, cmd_q->reg_interrupt_status);
 
                /* Clear the interrupt status */
                iowrite32(0x00, cmd_q->reg_int_enable);
@@ -1002,7 +1002,8 @@ static irqreturn_t ccp5_irq_handler(int irq, void *data)
                        cmd_q->int_rcvd = 1;
 
                        /* Acknowledge the interrupt and wake the kthread */
-                       iowrite32(ALL_INTERRUPTS, cmd_q->reg_interrupt_status);
+                       iowrite32(SUPPORTED_INTERRUPTS,
+                                 cmd_q->reg_interrupt_status);
                        wake_up_interruptible(&cmd_q->int_queue);
                }
        }

diff --git a/drivers/crypto/ccp/ccp-dev.h b/drivers/crypto/ccp/ccp-dev.h
index 191274d..2dfec01 100644 (file)
--- a/drivers/crypto/ccp/ccp-dev.h
+++ b/drivers/crypto/ccp/ccp-dev.h
@@ -109,9 +109,8 @@
 #define INT_COMPLETION                 0x1
 #define INT_ERROR                      0x2
 #define INT_QUEUE_STOPPED              0x4
-#define ALL_INTERRUPTS                 (INT_COMPLETION| \
-                                        INT_ERROR| \
-                                        INT_QUEUE_STOPPED)
+#define        INT_EMPTY_QUEUE                 0x8
+#define SUPPORTED_INTERRUPTS           (INT_COMPLETION | INT_ERROR)
 
 #define LSB_REGION_WIDTH               5
 #define MAX_LSB_CNT                    8