---

yaml
---
r: 63228
b: refs/heads/master
c: f17fddc
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 1655fc2e12ed7d208403c043428291b83aa833bb
+refs/heads/master: f17fddc9e266281bbb4d384b031e1521e1f2510e

trunk/drivers/infiniband/hw/ipath/ipath_common.h

@@ -100,8 +100,7 @@ struct infinipath_stats {
 	__u64 sps_hwerrs;
 	/* number of times IB link changed state unexpectedly */
 	__u64 sps_iblink;
-	/* kernel receive interrupts that didn't read intstat */
-	__u64 sps_fastrcvint;
+	__u64 sps_unused; /* was fastrcvint, no longer implemented */
 	/* number of kernel (port0) packets received */
 	__u64 sps_port0pkts;
 	/* number of "ethernet" packets sent by driver */

trunk/drivers/infiniband/hw/ipath/ipath_intr.c

@@ -1002,7 +1002,6 @@ irqreturn_t ipath_intr(int irq, void *data)
 	u32 istat, chk0rcv = 0;
 	ipath_err_t estat = 0;
 	irqreturn_t ret;
-	u32 oldhead, curtail;
 	static unsigned unexpected = 0;
 	static const u32 port0rbits = (1U<<INFINIPATH_I_RCVAVAIL_SHIFT) |
 		 (1U<<INFINIPATH_I_RCVURG_SHIFT);
@@ -1035,36 +1034,6 @@ irqreturn_t ipath_intr(int irq, void *data)
 		goto bail;
 	}
 
-	/*
-	 * We try to avoid reading the interrupt status register, since
-	 * that's a PIO read, and stalls the processor for up to about
-	 * ~0.25 usec. The idea is that if we processed a port0 packet,
-	 * we blindly clear the  port 0 receive interrupt bits, and nothing
-	 * else, then return.  If other interrupts are pending, the chip
-	 * will re-interrupt us as soon as we write the intclear register.
-	 * We then won't process any more kernel packets (if not the 2nd
-	 * time, then the 3rd or 4th) and we'll then handle the other
-	 * interrupts.   We clear the interrupts first so that we don't
-	 * lose intr for later packets that arrive while we are processing.
-	 */
-	oldhead = dd->ipath_port0head;
-	curtail = (u32)le64_to_cpu(*dd->ipath_hdrqtailptr);
-	if (oldhead != curtail) {
-		if (dd->ipath_flags & IPATH_GPIO_INTR) {
-			ipath_write_kreg(dd, dd->ipath_kregs->kr_gpio_clear,
-					 (u64) (1 << IPATH_GPIO_PORT0_BIT));
-			istat = port0rbits | INFINIPATH_I_GPIO;
-		}
-		else
-			istat = port0rbits;
-		ipath_write_kreg(dd, dd->ipath_kregs->kr_intclear, istat);
-		ipath_kreceive(dd);
-		if (oldhead != dd->ipath_port0head) {
-			ipath_stats.sps_fastrcvint++;
-			goto done;
-		}
-	}
-
 	istat = ipath_read_kreg32(dd, dd->ipath_kregs->kr_intstatus);
 
 	if (unlikely(!istat)) {
@@ -1225,7 +1194,6 @@ irqreturn_t ipath_intr(int irq, void *data)
 		handle_layer_pioavail(dd);
 	}
 
-done:
 	ret = IRQ_HANDLED;
 
 bail: