net/smc: Pass on DMBE bit mask in IRQ handler

Make the DMBE bits, which are passed on individually in ism_move() as
parameter idx, available to the receiver.
Signed-off-by: Stefan Raspl <raspl@linux.ibm.com>
Signed-off-by: Wenjia Zhang < wenjia@linux.ibm.com>
Reviewed-by: Tony Lu <tonylu@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/s390/net/ism_drv.c

@@ -443,6 +443,7 @@ static irqreturn_t ism_handle_irq(int irq, void *data)
 	struct ism_dev *ism = data;
 	unsigned long bit, end;
 	unsigned long *bv;
+	u16 dmbemask;
 
 	bv = (void *) &ism->sba->dmb_bits[ISM_DMB_WORD_OFFSET];
 	end = sizeof(ism->sba->dmb_bits) * BITS_PER_BYTE - ISM_DMB_BIT_OFFSET;
@@ -456,9 +457,10 @@ static irqreturn_t ism_handle_irq(int irq, void *data)
 			break;
 
 		clear_bit_inv(bit, bv);
+		dmbemask = ism->sba->dmbe_mask[bit + ISM_DMB_BIT_OFFSET];
 		ism->sba->dmbe_mask[bit + ISM_DMB_BIT_OFFSET] = 0;
 		barrier();
-		smcd_handle_irq(ism->smcd, bit + ISM_DMB_BIT_OFFSET);
+		smcd_handle_irq(ism->smcd, bit + ISM_DMB_BIT_OFFSET, dmbemask);
 	}
 
 	if (ism->sba->e) {

include/net/smc.h

@@ -101,5 +101,5 @@ int smcd_register_dev(struct smcd_dev *smcd);
 void smcd_unregister_dev(struct smcd_dev *smcd);
 void smcd_free_dev(struct smcd_dev *smcd);
 void smcd_handle_event(struct smcd_dev *dev, struct smcd_event *event);
-void smcd_handle_irq(struct smcd_dev *dev, unsigned int bit);
+void smcd_handle_irq(struct smcd_dev *dev, unsigned int bit, u16 dmbemask);
 #endif	/* _SMC_H */

net/smc/smc_ism.c

@@ -508,13 +508,13 @@ void smcd_handle_event(struct smcd_dev *smcd, struct smcd_event *event)
 EXPORT_SYMBOL_GPL(smcd_handle_event);
 
 /* SMCD Device interrupt handler. Called from ISM device interrupt handler.
- * Parameters are smcd device pointer and DMB number. Find the connection and
- * schedule the tasklet for this connection.
+ * Parameters are smcd device pointer, DMB number, and the DMBE bitmask.
+ * Find the connection and schedule the tasklet for this connection.
  *
  * Context:
  * - Function called in IRQ context from ISM device driver IRQ handler.
  */
-void smcd_handle_irq(struct smcd_dev *smcd, unsigned int dmbno)
+void smcd_handle_irq(struct smcd_dev *smcd, unsigned int dmbno, u16 dmbemask)
 {
 	struct smc_connection *conn = NULL;
 	unsigned long flags;