[SCSI] aacraid: Add timeout for events

Received from Mark Salyzyn

Plug and play actions resulting from event sequences shall time out if
they take longer than 30 seconds to complete.
Signed-off-by: Mark Haverkamp <markh@osdl.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/aacraid/aacraid.h

@@ -788,6 +788,7 @@ struct fsa_dev_info {
 	u64		size;
 	u32		type;
 	u32		config_waiting_on;
+	unsigned long	config_waiting_stamp;
 	u16		queue_depth;
 	u8		config_needed;
 	u8		valid;

drivers/scsi/aacraid/commsup.c

@@ -784,6 +784,7 @@ void aac_printf(struct aac_dev *dev, u32 val)
  *	dispatches it to the appropriate routine for handling.
  */
 
+#define AIF_SNIFF_TIMEOUT	(30*HZ)
 static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
 {
 	struct hw_fib * hw_fib = fibptr->hw_fib;
@@ -837,6 +838,7 @@ static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
 				if (device) {
 					dev->fsa_dev[container].config_needed = CHANGE;
 					dev->fsa_dev[container].config_waiting_on = AifEnConfigChange;
+					dev->fsa_dev[container].config_waiting_stamp = jiffies;
 					scsi_device_put(device);
 				}
 			}
@@ -849,13 +851,15 @@ static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
 		if (container != (u32)-1) {
 			if (container >= dev->maximum_num_containers)
 				break;
-			if (dev->fsa_dev[container].config_waiting_on ==
-			    le32_to_cpu(*(u32 *)aifcmd->data))
+			if ((dev->fsa_dev[container].config_waiting_on ==
+			    le32_to_cpu(*(u32 *)aifcmd->data)) &&
+			 time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 				dev->fsa_dev[container].config_waiting_on = 0;
 		} else for (container = 0;
 		    container < dev->maximum_num_containers; ++container) {
-			if (dev->fsa_dev[container].config_waiting_on ==
-			    le32_to_cpu(*(u32 *)aifcmd->data))
+			if ((dev->fsa_dev[container].config_waiting_on ==
+			    le32_to_cpu(*(u32 *)aifcmd->data)) &&
+			 time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 				dev->fsa_dev[container].config_waiting_on = 0;
 		}
 		break;
@@ -872,6 +876,7 @@ static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
 			dev->fsa_dev[container].config_needed = ADD;
 			dev->fsa_dev[container].config_waiting_on =
 				AifEnConfigChange;
+			dev->fsa_dev[container].config_waiting_stamp = jiffies;
 			break;
 
 		/*
@@ -884,6 +889,7 @@ static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
 			dev->fsa_dev[container].config_needed = DELETE;
 			dev->fsa_dev[container].config_waiting_on =
 				AifEnConfigChange;
+			dev->fsa_dev[container].config_waiting_stamp = jiffies;
 			break;
 
 		/*
@@ -894,11 +900,13 @@ static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
 			container = le32_to_cpu(((u32 *)aifcmd->data)[1]);
 			if (container >= dev->maximum_num_containers)
 				break;
-			if (dev->fsa_dev[container].config_waiting_on)
+			if (dev->fsa_dev[container].config_waiting_on &&
+			 time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 				break;
 			dev->fsa_dev[container].config_needed = CHANGE;
 			dev->fsa_dev[container].config_waiting_on =
 				AifEnConfigChange;
+			dev->fsa_dev[container].config_waiting_stamp = jiffies;
 			break;
 
 		case AifEnConfigChange:
@@ -913,13 +921,15 @@ static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
 		if (container != (u32)-1) {
 			if (container >= dev->maximum_num_containers)
 				break;
-			if (dev->fsa_dev[container].config_waiting_on ==
-			    le32_to_cpu(*(u32 *)aifcmd->data))
+			if ((dev->fsa_dev[container].config_waiting_on ==
+			    le32_to_cpu(*(u32 *)aifcmd->data)) &&
+			 time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 				dev->fsa_dev[container].config_waiting_on = 0;
 		} else for (container = 0;
 		    container < dev->maximum_num_containers; ++container) {
-			if (dev->fsa_dev[container].config_waiting_on ==
-			    le32_to_cpu(*(u32 *)aifcmd->data))
+			if ((dev->fsa_dev[container].config_waiting_on ==
+			    le32_to_cpu(*(u32 *)aifcmd->data)) &&
+			 time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT))
 				dev->fsa_dev[container].config_waiting_on = 0;
 		}
 		break;
@@ -946,6 +956,8 @@ static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
 				dev->fsa_dev[container].config_waiting_on =
 					AifEnContainerChange;
 				dev->fsa_dev[container].config_needed = ADD;
+				dev->fsa_dev[container].config_waiting_stamp =
+					jiffies;
 			}
 		}
 		if ((((u32 *)aifcmd->data)[1] == cpu_to_le32(AifJobCtrZero))
@@ -961,6 +973,8 @@ static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
 				dev->fsa_dev[container].config_waiting_on =
 					AifEnContainerChange;
 				dev->fsa_dev[container].config_needed = DELETE;
+				dev->fsa_dev[container].config_waiting_stamp =
+					jiffies;
 			}
 		}
 		break;
@@ -969,8 +983,9 @@ static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
 	device_config_needed = NOTHING;
 	for (container = 0; container < dev->maximum_num_containers;
 	    ++container) {
-		if ((dev->fsa_dev[container].config_waiting_on == 0)
-		 && (dev->fsa_dev[container].config_needed != NOTHING)) {
+		if ((dev->fsa_dev[container].config_waiting_on == 0) &&
+			(dev->fsa_dev[container].config_needed != NOTHING) &&
+			time_before(jiffies, dev->fsa_dev[container].config_waiting_stamp + AIF_SNIFF_TIMEOUT)) {
 			device_config_needed =
 				dev->fsa_dev[container].config_needed;
 			dev->fsa_dev[container].config_needed = NOTHING;