[S390] sclp: clean up send/receive naming scheme

Make state change events adjust the correct mask by cleaning up
naming inconsistencies. Also remove chance for lockup by removing
unnecessary mask related check before reading events.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 6 insertions, 6 deletions

diff --git a/drivers/s390/char/sclp.c b/drivers/s390/char/sclp.c
index 25629b92dec..2c7a1ee6b04 100644
--- a/drivers/s390/char/sclp.c
+++ b/drivers/s390/char/sclp.c
@@ -29,10 +29,10 @@ static ext_int_info_t ext_int_info_hwc;
 /* Lock to protect internal data consistency. */
 static DEFINE_SPINLOCK(sclp_lock);
 
-/* Mask of events that we can receive from the sclp interface. */
+/* Mask of events that we can send to the sclp interface. */
 static sccb_mask_t sclp_receive_mask;
 
-/* Mask of events that we can send to the sclp interface. */
+/* Mask of events that we can receive from the sclp interface. */
 static sccb_mask_t sclp_send_mask;
 
 /* List of registered event listeners and senders. */
@@ -380,7 +380,7 @@ sclp_interrupt_handler(__u16 code)
                 }
                 sclp_running_state = sclp_running_state_idle;
         }
-        if (evbuf_pending && sclp_receive_mask != 0 &&
+        if (evbuf_pending &&
             sclp_activation_state == sclp_activation_state_active)
                 __sclp_queue_read_req();
         spin_unlock(&sclp_lock);
@@ -459,8 +459,8 @@ sclp_dispatch_state_change(void)
                 reg = NULL;
                 list_for_each(l, &sclp_reg_list) {
                         reg = list_entry(l, struct sclp_register, list);
-                        receive_mask = reg->receive_mask & sclp_receive_mask;
-                        send_mask = reg->send_mask & sclp_send_mask;
+                        receive_mask = reg->send_mask & sclp_receive_mask;
+                        send_mask = reg->receive_mask & sclp_send_mask;
                         if (reg->sclp_receive_mask != receive_mask ||
                             reg->sclp_send_mask != send_mask) {
                                 reg->sclp_receive_mask = receive_mask;
@@ -615,8 +615,8 @@ struct init_sccb {
         u16 mask_length;
         sccb_mask_t receive_mask;
         sccb_mask_t send_mask;
-        sccb_mask_t sclp_send_mask;
         sccb_mask_t sclp_receive_mask;
+        sccb_mask_t sclp_send_mask;
 } __attribute__((packed));
 
 /* Prepare init mask request. Called while sclp_lock is locked. */