Merge branch 'stable/for-jens-3.4-bugfixes' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen into for-3.4/drivers

Konrad writes:

I've two small fixes for the xen-blkback - and I think one more will show up
eventually (a partial revert), but not sure when. So in the spirit of keeping
the patches flowing, please git pull the following branch.

drivers/block/mtip32xx/mtip32xx.c

diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index 8eb81c9..04f69e6da 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -422,6 +422,10 @@
 	/* Clear any pending interrupts for this port */
 	writel(readl(port->mmio + PORT_IRQ_STAT), port->mmio + PORT_IRQ_STAT);
 
+	/* Clear any pending interrupts on the HBA. */
+	writel(readl(port->dd->mmio + HOST_IRQ_STAT),
+					port->dd->mmio + HOST_IRQ_STAT);
+
 	/* Enable port interrupts */
 	writel(DEF_PORT_IRQ, port->mmio + PORT_IRQ_MASK);
 }
@@ -490,11 +494,9 @@
 		dev_warn(&port->dd->pdev->dev,
 			"COM reset failed\n");
 
-	/* Clear SError, the PxSERR.DIAG.x should be set so clear it */
-	writel(readl(port->mmio + PORT_SCR_ERR), port->mmio + PORT_SCR_ERR);
+	mtip_init_port(port);
+	mtip_start_port(port);
 
-	/* Enable the DMA engine */
-	mtip_enable_engine(port, 1);
 }
 
 /*
@@ -3359,9 +3361,6 @@
 		return -ENOMEM;
 	}
 
-	/* Set the atomic variable as 1 in case of SRSI */
-	atomic_set(&dd->drv_cleanup_done, true);
-
 	atomic_set(&dd->resumeflag, false);
 
 	/* Attach the private data to this PCI device.  */
@@ -3434,8 +3433,8 @@
 	pci_set_drvdata(pdev, NULL);
 	return rv;
 done:
-	/* Set the atomic variable as 0 in case of SRSI */
-	atomic_set(&dd->drv_cleanup_done, true);
+	/* Set the atomic variable as 0 */
+	atomic_set(&dd->drv_cleanup_done, false);
 
 	return rv;
 }
@@ -3463,8 +3462,6 @@
 			}
 		}
 	}
-	/* Set the atomic variable as 1 in case of SRSI */
-	atomic_set(&dd->drv_cleanup_done, true);
 
 	/* Clean up the block layer. */
 	mtip_block_remove(dd);