qdio: support forced signal adapter indications

This patch ensures that signal adapter commands are issued if they are
indicated to be required.

Signed-off-by: Einar Lueck <elelueck@de.ibm.com>
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 1 insertions, 13 deletions

diff --git a/drivers/s390/cio/qdio.h b/drivers/s390/cio/qdio.h
index 2b21f65a895..3dd86441da3 100644
--- a/drivers/s390/cio/qdio.h
+++ b/drivers/s390/cio/qdio.h
@@ -87,15 +87,6 @@ enum qdio_irq_states {
 #define CHSC_FLAG_QDIO_CAPABILITY       0x80
 #define CHSC_FLAG_VALIDITY              0x40
 
-/* qdio adapter-characteristics-1 flag */
-#define AC1_SIGA_INPUT_NEEDED           0x40    /* process input queues */
-#define AC1_SIGA_OUTPUT_NEEDED          0x20    /* process output queues */
-#define AC1_SIGA_SYNC_NEEDED            0x10    /* ask hypervisor to sync */
-#define AC1_AUTOMATIC_SYNC_ON_THININT   0x08    /* set by hypervisor */
-#define AC1_AUTOMATIC_SYNC_ON_OUT_PCI   0x04    /* set by hypervisor */
-#define AC1_SC_QEBSM_AVAILABLE          0x02    /* available for subchannel */
-#define AC1_SC_QEBSM_ENABLED            0x01    /* enabled for subchannel */
-
 /* SIGA flags */
 #define QDIO_SIGA_WRITE         0x00
 #define QDIO_SIGA_READ          0x01
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index a7153f2f3af..9a122280246 100644
--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -1592,12 +1592,9 @@ set:
         used = atomic_add_return(count, &q->nr_buf_used) - count;
         BUG_ON(used + count > QDIO_MAX_BUFFERS_PER_Q);
 
-        /* no need to signal as long as the adapter had free buffers */
-        if (used)
-                return 0;
-
         if (need_siga_in(q))
                 return qdio_siga_input(q);
+
         return 0;
 }