[PATCH] 1394 updates

- New irq handler prototypes.
- Lots of un-enumurated locking fixes/cleanups (thanks in large part to
  spinlock debug compile options in the kernel).
- Other various trivial fixes.

drivers/ieee1394/dv1394-private.h

@@ -455,6 +455,10 @@ struct video_card {
 	 */
 	spinlock_t spinlock;
 
+	/* flag to prevent spurious interrupts (which OHCI seems to
+	   generate a lot :) from accessing the struct */
+	int dma_running;
+	
 	/*
 	  3) the sleeping semaphore 'sem' - this is used from process context only,
 	  to serialize various operations on the video_card. Even though only one
@@ -568,7 +572,7 @@ static inline int video_card_initialized(struct video_card *v)
 
 static int do_dv1394_init(struct video_card *video, struct dv1394_init *init);
 static int do_dv1394_init_default(struct video_card *video);
-static int do_dv1394_shutdown(struct video_card *video, int free_user_buf);
+static void do_dv1394_shutdown(struct video_card *video, int free_user_buf);
 
 
 /* NTSC empty packet rate accurate to within 0.01%, 

drivers/ieee1394/dv1394.c

@@ -689,7 +689,7 @@ static void frame_prepare(struct video_card *video, unsigned int this_frame)
 		wmb();
 #endif
 
-		
+		video->dma_running = 1;
 
 		/* set the 'run' bit */
 		reg_write(video->ohci, video->ohci_IsoXmitContextControlSet, 0x8000);
@@ -812,6 +812,8 @@ static void start_dma_receive(struct video_card *video)
 			  video->frames[0]->descriptor_pool_dma | 1); /* Z=1 */
 		wmb();
 
+		video->dma_running = 1;
+
 		/* run */
 		reg_write(video->ohci, video->ohci_IsoRcvContextControlSet, 0x8000);
 		flush_pci_write(video->ohci);
@@ -912,16 +914,16 @@ static int do_dv1394_init(struct video_card *video, struct dv1394_init *init)
 	u64 chan_mask;
 	int retval = -EINVAL;
 
-	debug_printk( "dv1394: initialising %d\n", video->id );
+	debug_printk("dv1394: initialising %d\n", video->id);
 	if(init->api_version != DV1394_API_VERSION)
-		goto err;
+		return -EINVAL;
 	
 	/* first sanitize all the parameters */
 	if( (init->n_frames < 2) || (init->n_frames > DV1394_MAX_FRAMES) )
-		goto err;
+		return -EINVAL;
 
 	if( (init->format != DV1394_NTSC) && (init->format != DV1394_PAL) )
-		goto err;
+		return -EINVAL;
 
 	if( (init->syt_offset == 0) || (init->syt_offset > 50) )
 		/* default SYT offset is 3 cycles */
@@ -942,15 +944,15 @@ static int do_dv1394_init(struct video_card *video, struct dv1394_init *init)
 	if(new_buf_size % PAGE_SIZE) new_buf_size += PAGE_SIZE - (new_buf_size % PAGE_SIZE);
 
 	/* don't allow the user to allocate the DMA buffer more than once */
-	if(video->dv_buf.kvirt && video->dv_buf_size != new_buf_size)
-		goto err;
+	if(video->dv_buf.kvirt && video->dv_buf_size != new_buf_size) {
+		printk("dv1394: re-sizing the DMA buffer is not allowed\n");
+		return -EINVAL;
+	}
 
 	/* shutdown the card if it's currently active */
 	/* (the card should not be reset if the parameters are screwy) */
-	if( video_card_initialized(video) )
-		do_dv1394_shutdown(video, 0);
-
 
+	do_dv1394_shutdown(video, 0);
 	
 	/* try to claim the ISO channel */
 	spin_lock_irqsave(&video->ohci->IR_channel_lock, flags);
@@ -968,7 +970,6 @@ static int do_dv1394_init(struct video_card *video, struct dv1394_init *init)
 	video->n_frames = init->n_frames;
 	video->pal_or_ntsc = init->format;
 
-
 	video->cip_accum = 0;
 	video->continuity_counter = 0;
 
@@ -983,7 +984,6 @@ static int do_dv1394_init(struct video_card *video, struct dv1394_init *init)
 	video->current_packet = -1;
 	video->first_frame = 0;
 
-
 	if(video->pal_or_ntsc == DV1394_NTSC) {
 		video->cip_n = init->cip_n != 0 ? init->cip_n : CIP_N_NTSC;
 		video->cip_d = init->cip_d != 0 ? init->cip_d : CIP_D_NTSC;
@@ -996,14 +996,8 @@ static int do_dv1394_init(struct video_card *video, struct dv1394_init *init)
 
 	video->syt_offset = init->syt_offset;
 	
-	
 	/* find and claim DMA contexts on the OHCI card */
 
-	/* XXX this should be the last step of initialization, since the interrupt
-	   handler uses ohci_i*_ctx to indicate whether or not it is safe to touch
-	   frames. I'm not making this change quite yet, since it would be better
-	   to clean up the init/shutdown process first.*/
-
 	if(video->ohci_it_ctx == -1) {
 		ohci1394_init_iso_tasklet(&video->it_tasklet, OHCI_ISO_TRANSMIT,
 					  it_tasklet_func, (unsigned long) video);
@@ -1011,14 +1005,12 @@ static int do_dv1394_init(struct video_card *video, struct dv1394_init *init)
 		if (ohci1394_register_iso_tasklet(video->ohci, &video->it_tasklet) < 0) {	
 			printk(KERN_ERR "dv1394: could not find an available IT DMA context\n");
 			retval = -EBUSY;
-			goto err_ctx;
+			goto err;
 		}
-		else {
+		
 		video->ohci_it_ctx = video->it_tasklet.context;
 		debug_printk("dv1394: claimed IT DMA context %d\n", video->ohci_it_ctx);
 	}
-	}
-	
 
 	if(video->ohci_ir_ctx == -1) {
 		ohci1394_init_iso_tasklet(&video->ir_tasklet, OHCI_ISO_RECEIVE,
@@ -1027,14 +1019,11 @@ static int do_dv1394_init(struct video_card *video, struct dv1394_init *init)
 		if (ohci1394_register_iso_tasklet(video->ohci, &video->ir_tasklet) < 0) {
 			printk(KERN_ERR "dv1394: could not find an available IR DMA context\n");
 			retval = -EBUSY;
-			goto err_ctx;
+			goto err;
 		}
-		else {
 		video->ohci_ir_ctx = video->ir_tasklet.context;
 		debug_printk("dv1394: claimed IR DMA context %d\n", video->ohci_ir_ctx);
 	}
-	}
-
 	
 	/* allocate struct frames */
 	for(i = 0; i < init->n_frames; i++) {
@@ -1043,7 +1032,7 @@ static int do_dv1394_init(struct video_card *video, struct dv1394_init *init)
 		if(!video->frames[i]) {
 			printk(KERN_ERR "dv1394: Cannot allocate frame structs\n");
 			retval = -ENOMEM;
-			goto err_frames;
+			goto err;
 		}
 	}
 
@@ -1051,7 +1040,7 @@ static int do_dv1394_init(struct video_card *video, struct dv1394_init *init)
 		/* allocate the ringbuffer */
 		retval = dma_region_alloc(&video->dv_buf, new_buf_size, video->ohci->dev, PCI_DMA_TODEVICE);
 		if(retval)
-			goto err_frames;
+			goto err;
 					  
 		video->dv_buf_size = new_buf_size;
 
@@ -1073,7 +1062,7 @@ static int do_dv1394_init(struct video_card *video, struct dv1394_init *init)
 		retval = dma_region_alloc(&video->packet_buf, video->packet_buf_size,
 					  video->ohci->dev, PCI_DMA_FROMDEVICE);
 		if(retval)
-			goto err_dv_buf;
+			goto err;
 		
 		debug_printk("dv1394: Allocated %d packets in buffer, total %u pages (%u DMA pages), %lu bytes\n", 
 				 video->n_frames*MAX_PACKETS, video->packet_buf.n_pages,
@@ -1103,30 +1092,8 @@ static int do_dv1394_init(struct video_card *video, struct dv1394_init *init)
 	
 	return 0;
 
- err_dv_buf:
-	dma_region_free(&video->dv_buf);
-	
- err_frames:
-	for(i = 0; i < DV1394_MAX_FRAMES; i++) {
-		if(video->frames[i])
-			frame_delete(video->frames[i]);
-	}	
-	video->n_frames = 0;
-
- err_ctx:
-	if(video->ohci_it_ctx != -1) {
-		ohci1394_unregister_iso_tasklet(video->ohci, &video->it_tasklet);
-		video->ohci_it_ctx = -1;
-	}
-	if(video->ohci_ir_ctx != -1) {
-		ohci1394_unregister_iso_tasklet(video->ohci, &video->ir_tasklet);
-		video->ohci_ir_ctx = -1;
-	}
-	
-	spin_lock_irqsave(&video->ohci->IR_channel_lock, flags);
-	video->ohci->ISO_channel_usage &= ~chan_mask;
-	spin_unlock_irqrestore(&video->ohci->IR_channel_lock, flags);
- err:
+err:
+	do_dv1394_shutdown(video, 1);
 	return retval;
 }
 
@@ -1158,6 +1125,11 @@ static void stop_dma(struct video_card *video)
 	/* no interrupts */
 	spin_lock_irqsave(&video->spinlock, flags);
 
+	video->dma_running = 0;
+
+	if( (video->ohci_it_ctx == -1) && (video->ohci_ir_ctx == -1) )
+		goto out;
+
 	/* stop DMA if in progress */
 	if( (video->active_frame != -1) ||
 	    (reg_read(video->ohci, video->ohci_IsoXmitContextControlClear) & (1 << 10)) ||
@@ -1198,23 +1170,21 @@ static void stop_dma(struct video_card *video)
 	else
 		debug_printk("dv1394: stop_dma: already stopped.\n");
 
+out:
 	spin_unlock_irqrestore(&video->spinlock, flags);
 }
 
 
 
-static int do_dv1394_shutdown(struct video_card *video, int free_dv_buf)
+static void do_dv1394_shutdown(struct video_card *video, int free_dv_buf)
 {
 	int i;
-	unsigned long flags;
 	
 	debug_printk("dv1394: shutdown...\n");
 
 	/* stop DMA if in progress */
 	stop_dma(video);
 	
-	spin_lock_irqsave(&video->spinlock, flags);
-
 	/* release the DMA contexts */
 	if(video->ohci_it_ctx != -1) {
 		video->ohci_IsoXmitContextControlSet = 0;
@@ -1245,8 +1215,6 @@ static int do_dv1394_shutdown(struct video_card *video, int free_dv_buf)
 		video->ohci_ir_ctx = -1;
 	}
 
-	spin_unlock_irqrestore(&video->spinlock, flags);
-
 	/* release the ISO channel */
 	if(video->channel != -1) {
 		u64 chan_mask;
@@ -1282,9 +1250,7 @@ static int do_dv1394_shutdown(struct video_card *video, int free_dv_buf)
 	dma_region_free(&video->packet_buf);
 	video->packet_buf_size = 0;
 
-	debug_printk("dv1394: shutdown complete\n");
-
-	return 0;
+	debug_printk("dv1394: shutdown OK\n");
 }
 
 /*
@@ -1770,7 +1736,8 @@ static int dv1394_ioctl(struct inode *inode, struct file *file,
 	}
 
 	case DV1394_IOC_SHUTDOWN:
-		ret = do_dv1394_shutdown(video, 0);
+		do_dv1394_shutdown(video, 0);
+		ret = 0;
 		break;
 
 
@@ -2140,6 +2107,9 @@ static void it_tasklet_func(unsigned long data)
 
 	spin_lock(&video->spinlock);
 
+	if(!video->dma_running)
+		goto out;
+
 	irq_printk("ContextControl = %08x, CommandPtr = %08x\n", 
 	       reg_read(video->ohci, video->ohci_IsoXmitContextControlSet),
 	       reg_read(video->ohci, video->ohci_IsoXmitCommandPtr)
@@ -2266,14 +2236,15 @@ static void it_tasklet_func(unsigned long data)
 		} /* for(each frame) */
 	}
 
-	spin_unlock(&video->spinlock);
-
 	if(wake) {
 		kill_fasync(&video->fasync, SIGIO, POLL_OUT);
 		
 		/* wake readers/writers/ioctl'ers */
 		wake_up_interruptible(&video->waitq);
 	}
+
+out:
+	spin_unlock(&video->spinlock);
 }
 
 static void ir_tasklet_func(unsigned long data)
@@ -2283,8 +2254,11 @@ static void ir_tasklet_func(unsigned long data)
 
 	spin_lock(&video->spinlock);
 
-	if( (video->ohci_ir_ctx != -1) 
-	    && (reg_read(video->ohci, video->ohci_IsoRcvContextControlSet) & (1 << 10)) ) 
+	if(!video->dma_running)
+		goto out;
+	
+	if( (video->ohci_ir_ctx != -1) &&
+	    (reg_read(video->ohci, video->ohci_IsoRcvContextControlSet) & (1 << 10)) )
 	{ 
 
 		int sof=0; /* start-of-frame flag */
@@ -2424,14 +2398,15 @@ static void ir_tasklet_func(unsigned long data)
 		
 	} /* receive interrupt */
 	
-	spin_unlock(&video->spinlock);
-	
 	if(wake) {
 		kill_fasync(&video->fasync, SIGIO, POLL_IN);
 
 		/* wake readers/writers/ioctl'ers */
 		wake_up_interruptible(&video->waitq);
 	}
+	
+out:
+	spin_unlock(&video->spinlock);
 }
 
 static struct file_operations dv1394_fops=
@@ -2554,6 +2529,7 @@ static int dv1394_init(struct ti_ohci *ohci, enum pal_or_ntsc format, enum modes
 
 	clear_bit(0, &video->open);
 	spin_lock_init(&video->spinlock);
+	video->dma_running = 0;
 	init_MUTEX(&video->sem);
 	init_waitqueue_head(&video->waitq);
 	video->fasync = NULL;
@@ -2718,6 +2694,9 @@ static void dv1394_host_reset(struct hpsb_host *host)
 	
 	spin_lock_irqsave(&video->spinlock, flags);
 
+	if(!video->dma_running)
+		goto out;
+
 	/* check IT context */
 	if(video->ohci_it_ctx != -1) {
 		u32 ctx;
@@ -2791,6 +2770,7 @@ static void dv1394_host_reset(struct hpsb_host *host)
 		}
 	}
 
+out:
 	spin_unlock_irqrestore(&video->spinlock, flags);
 	
 	/* wake readers/writers/ioctl'ers */

drivers/ieee1394/eth1394.c

@@ -78,7 +78,7 @@
 	printk(KERN_ERR fmt, ## args)
 
 static char version[] __devinitdata =
-	"$Rev: 886 $ Ben Collins <bcollins@debian.org>";
+	"$Rev: 895 $ Ben Collins <bcollins@debian.org>";
 
 /* Our ieee1394 highlevel driver */
 #define ETHER1394_DRIVER_NAME "ether1394"
@@ -340,6 +340,7 @@ static void ether1394_add_host (struct hpsb_host *host, struct hpsb_highlevel *h
 	priv = (struct eth1394_priv *)dev->priv;
 
 	priv->host = host;
+	spin_lock_init(&priv->lock);
 
 	hi = hpsb_create_hostinfo(hl, host, sizeof(*hi));
 

drivers/ieee1394/highlevel.c

@@ -38,7 +38,7 @@ struct hl_host_info {
 
 
 static LIST_HEAD(hl_drivers);
-static DECLARE_MUTEX(hl_drivers_lock);
+static rwlock_t hl_drivers_lock = RW_LOCK_UNLOCKED;
 
 static LIST_HEAD(addr_space);
 static rwlock_t addr_space_lock = RW_LOCK_UNLOCKED;
@@ -48,20 +48,22 @@ static struct hpsb_address_ops dummy_ops = { NULL, NULL, NULL, NULL };
 static struct hpsb_address_serve dummy_zero_addr, dummy_max_addr;
 
 
-/* Internal usage. Must be called with hl_drivers_lock held */
 static struct hl_host_info *hl_get_hostinfo(struct hpsb_highlevel *hl,
 					      struct hpsb_host *host)
 {
-	struct hl_host_info *hi;
+	struct hl_host_info *hi = NULL;
 	struct list_head *lh;
 
+	read_lock(&hl->host_info_lock);
 	list_for_each (lh, &hl->host_info_list) {
 		hi = list_entry(lh, struct hl_host_info, list);
 		if (hi->host == host)
-			return hi;
+			break;
+		hi = NULL;
 	}
+	read_unlock(&hl->host_info_lock);
 
-	return NULL;
+	return hi;
 }
 
 
@@ -69,16 +71,12 @@ static struct hl_host_info *hl_get_hostinfo(struct hpsb_highlevel *hl,
  * hpsb_create_hostinfo. */
 void *hpsb_get_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host)
 {
-	struct hl_host_info *hi;
-	void *data = NULL;
+	struct hl_host_info *hi = hl_get_hostinfo(hl, host);
 
-	read_lock(&hl_drivers_lock);
-	hi = hl_get_hostinfo(hl, host);
 	if (hi)
-		data = hi->data;
-	read_unlock(&hl_drivers_lock);
+		return hi->data;
 
-	return data;
+	return NULL;
 }
 
 
@@ -88,10 +86,9 @@ void *hpsb_create_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host,
 {
 	struct hl_host_info *hi;
 	void *data;
+	unsigned long flags;
 
-	read_lock(&hl_drivers_lock);
 	hi = hl_get_hostinfo(hl, host);
-	read_unlock(&hl_drivers_lock);
 	if (hi) {
 		HPSB_ERR("%s called hpsb_create_hostinfo when hostinfo already exists",
 			 hl->name);
@@ -112,9 +109,9 @@ void *hpsb_create_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host,
 
 	hi->host = host;
 
-	write_lock_irq(&hl_drivers_lock);
+	write_lock_irqsave(&hl->host_info_lock, flags);
 	list_add_tail(&hi->list, &hl->host_info_list);
-	write_unlock_irq(&hl_drivers_lock);
+	write_unlock_irqrestore(&hl->host_info_lock, flags);
 
 	return data;
 }
@@ -124,23 +121,20 @@ int hpsb_set_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host,
 		      void *data)
 {
 	struct hl_host_info *hi;
-	int ret = -EINVAL;
 
-	write_lock_irq(&hl_drivers_lock);
 	hi = hl_get_hostinfo(hl, host);
 	if (hi) {
 		if (!hi->size && !hi->data) {
 			hi->data = data;
-			ret = 0;
+			return 0;
 		} else
 			HPSB_ERR("%s called hpsb_set_hostinfo when hostinfo already has data",
 				 hl->name);
 	} else
 		HPSB_ERR("%s called hpsb_set_hostinfo when no hostinfo exists",
 			 hl->name);
-	write_unlock_irq(&hl_drivers_lock);
 
-	return ret;
+	return -EINVAL;
 }
 
 
@@ -148,13 +142,14 @@ void hpsb_destroy_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host)
 {
 	struct hl_host_info *hi;
 
-	write_lock_irq(&hl_drivers_lock);
 	hi = hl_get_hostinfo(hl, host);
 	if (hi) {
+		unsigned long flags;
+		write_lock_irqsave(&hl->host_info_lock, flags);
 		list_del(&hi->list);
+		write_unlock_irqrestore(&hl->host_info_lock, flags);
 		kfree(hi);
 	}
-	write_unlock_irq(&hl_drivers_lock);
 
 	return;
 }
@@ -164,11 +159,9 @@ void hpsb_set_hostinfo_key(struct hpsb_highlevel *hl, struct hpsb_host *host, un
 {
 	struct hl_host_info *hi;
 
-	write_lock(&hl_drivers_lock);
 	hi = hl_get_hostinfo(hl, host);
 	if (hi)
 		hi->key = key;
-	write_unlock(&hl_drivers_lock);
 
 	return;
 }
@@ -177,15 +170,12 @@ void hpsb_set_hostinfo_key(struct hpsb_highlevel *hl, struct hpsb_host *host, un
 unsigned long hpsb_get_hostinfo_key(struct hpsb_highlevel *hl, struct hpsb_host *host)
 {
 	struct hl_host_info *hi;
-	unsigned long key = 0;
 
-	read_lock(&hl_drivers_lock);
 	hi = hl_get_hostinfo(hl, host);
 	if (hi)
-		key = hi->key;
-	read_unlock(&hl_drivers_lock);
+		return hi->key;
 
-	return key;
+	return 0;
 }
 
 
@@ -195,7 +185,7 @@ void *hpsb_get_hostinfo_bykey(struct hpsb_highlevel *hl, unsigned long key)
 	struct hl_host_info *hi;
 	void *data = NULL;
 
-	read_lock(&hl_drivers_lock);
+	read_lock(&hl->host_info_lock);
 	list_for_each (lh, &hl->host_info_list) {
 		hi = list_entry(lh, struct hl_host_info, list);
 		if (hi->key == key) {
@@ -203,7 +193,7 @@ void *hpsb_get_hostinfo_bykey(struct hpsb_highlevel *hl, unsigned long key)
 			break;
 		}
 	}
-	read_unlock(&hl_drivers_lock);
+	read_unlock(&hl->host_info_lock);
 
 	return data;
 }
@@ -214,6 +204,7 @@ struct hpsb_highlevel *hpsb_register_highlevel(const char *name,
 {
         struct hpsb_highlevel *hl;
 	struct list_head *lh;
+	unsigned long flags;
 
         hl = (struct hpsb_highlevel *)kmalloc(sizeof(struct hpsb_highlevel),
                                               GFP_KERNEL);
@@ -225,12 +216,14 @@ struct hpsb_highlevel *hpsb_register_highlevel(const char *name,
         INIT_LIST_HEAD(&hl->addr_list);
 	INIT_LIST_HEAD(&hl->host_info_list);
 
+	rwlock_init(&hl->host_info_lock);
+
         hl->name = name;
         hl->op = ops;
 
-	down(&hl_drivers_lock);
+	write_lock_irqsave(&hl_drivers_lock, flags);
         list_add_tail(&hl->hl_list, &hl_drivers);
-	up(&hl_drivers_lock);
+	write_unlock_irqrestore(&hl_drivers_lock, flags);
 
 	if (hl->op->add_host) {
 		down(&hpsb_hosts_lock);
@@ -248,22 +241,23 @@ void hpsb_unregister_highlevel(struct hpsb_highlevel *hl)
 {
         struct list_head *lh, *next;
         struct hpsb_address_serve *as;
+	unsigned long flags;
 
         if (hl == NULL) {
                 return;
         }
 
-        write_lock_irq(&addr_space_lock);
+	write_lock_irqsave(&addr_space_lock, flags);
 	list_for_each_safe (lh, next, &hl->addr_list) {
                 as = list_entry(lh, struct hpsb_address_serve, addr_list);
                 list_del(&as->as_list);
                 kfree(as);
         }
-        write_unlock_irq(&addr_space_lock);
+	write_unlock_irqrestore(&addr_space_lock, flags);
 
-	down(&hl_drivers_lock);
+	write_lock_irqsave(&hl_drivers_lock, flags);
         list_del(&hl->hl_list);
-	up(&hl_drivers_lock);
+	write_unlock_irqrestore(&hl_drivers_lock, flags);
 
         if (hl->op->remove_host) {
 		down(&hpsb_hosts_lock);
@@ -307,8 +301,10 @@ int hpsb_register_addrspace(struct hpsb_highlevel *hl,
         write_lock_irqsave(&addr_space_lock, flags);
         entry = addr_space.next;
 
-        while (list_entry(entry, struct hpsb_address_serve, as_list)->end <= start) {
-                if (list_entry(entry->next, struct hpsb_address_serve, as_list)->start >= end) {
+        while (list_entry(entry, struct hpsb_address_serve, as_list)->end
+               <= start) {
+                if (list_entry(entry->next, struct hpsb_address_serve, as_list)
+                    ->start >= end) {
                         list_add(&as->as_list, entry);
                         list_add_tail(&as->addr_list, &hl->addr_list);
                         retval = 1;
@@ -387,14 +383,13 @@ void highlevel_add_host(struct hpsb_host *host)
         struct list_head *entry;
         struct hpsb_highlevel *hl;
 
-	down(&hl_drivers_lock);
+        read_lock(&hl_drivers_lock);
         list_for_each(entry, &hl_drivers) {
                 hl = list_entry(entry, struct hpsb_highlevel, hl_list);
-
 		if (hl->op->add_host)
 			hl->op->add_host(host, hl);
         }
-        up(&hl_drivers_lock);
+        read_unlock(&hl_drivers_lock);
 }
 
 void highlevel_remove_host(struct hpsb_host *host)
@@ -402,7 +397,7 @@ void highlevel_remove_host(struct hpsb_host *host)
         struct list_head *entry;
         struct hpsb_highlevel *hl;
 
-        down(&hl_drivers_lock);
+	read_lock(&hl_drivers_lock);
 	list_for_each(entry, &hl_drivers) {
                 hl = list_entry(entry, struct hpsb_highlevel, hl_list);
 
@@ -411,7 +406,7 @@ void highlevel_remove_host(struct hpsb_host *host)
 			hpsb_destroy_hostinfo(hl, host);
 		}
         }
-        up(&hl_drivers_lock);
+	read_unlock(&hl_drivers_lock);
 }
 
 void highlevel_host_reset(struct hpsb_host *host)
@@ -419,14 +414,14 @@ void highlevel_host_reset(struct hpsb_host *host)
         struct list_head *entry;
         struct hpsb_highlevel *hl;
 
-	down(&hl_drivers_lock);
+	read_lock(&hl_drivers_lock);
 	list_for_each(entry, &hl_drivers) {
                 hl = list_entry(entry, struct hpsb_highlevel, hl_list);
 
                 if (hl->op->host_reset)
                         hl->op->host_reset(host);
         }
-	up(&hl_drivers_lock);
+	read_unlock(&hl_drivers_lock);
 }
 
 void highlevel_iso_receive(struct hpsb_host *host, void *data,
@@ -436,14 +431,17 @@ void highlevel_iso_receive(struct hpsb_host *host, void *data,
         struct hpsb_highlevel *hl;
         int channel = (((quadlet_t *)data)[0] >> 8) & 0x3f;
 
-        down(&hl_drivers_lock);
-	list_for_each(entry, &hl_drivers) {
-                hl = list_entry(entry, struct hpsb_highlevel, hl_list);
+        read_lock(&hl_drivers_lock);
+        entry = hl_drivers.next;
 
-                if (hl->op->iso_receive)
+        while (entry != &hl_drivers) {
+                hl = list_entry(entry, struct hpsb_highlevel, hl_list);
+                if (hl->op->iso_receive) {
                         hl->op->iso_receive(host, channel, data, length);
                 }
-        up(&hl_drivers_lock);
+                entry = entry->next;
+        }
+        read_unlock(&hl_drivers_lock);
 }
 
 void highlevel_fcp_request(struct hpsb_host *host, int nodeid, int direction,
@@ -453,13 +451,18 @@ void highlevel_fcp_request(struct hpsb_host *host, int nodeid, int direction,
         struct hpsb_highlevel *hl;
         int cts = ((quadlet_t *)data)[0] >> 4;
 
-        down(&hl_drivers_lock);
-	list_for_each(entry, &hl_drivers) {
+        read_lock(&hl_drivers_lock);
+        entry = hl_drivers.next;
+
+        while (entry != &hl_drivers) {
                 hl = list_entry(entry, struct hpsb_highlevel, hl_list);
-                if (hl->op->fcp_request)
-                        hl->op->fcp_request(host, nodeid, direction, cts, data, length);
+                if (hl->op->fcp_request) {
+                        hl->op->fcp_request(host, nodeid, direction, cts, data,
+                                            length);
                 }
-        up(&hl_drivers_lock);
+                entry = entry->next;
+        }
+        read_unlock(&hl_drivers_lock);
 }
 
 int highlevel_read(struct hpsb_host *host, int nodeid, void *data,

drivers/ieee1394/highlevel.h

@@ -14,6 +14,7 @@ struct hpsb_highlevel {
 
 	/* Used by the highlevel drivers to store data per host */
 	struct list_head host_info_list;
+	rwlock_t host_info_lock;
 };
 
 
@@ -176,5 +177,4 @@ void *hpsb_get_hostinfo_bykey(struct hpsb_highlevel *hl, unsigned long key);
  * hpsb_create_hostinfo, where the size is 0. */
 int hpsb_set_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host, void *data);
 
-
 #endif /* IEEE1394_HIGHLEVEL_H */

drivers/ieee1394/ieee1394_core.c

@@ -1295,7 +1295,6 @@ EXPORT_SYMBOL(highlevel_host_reset);
 /** nodemgr.c **/
 EXPORT_SYMBOL(hpsb_guid_get_entry);
 EXPORT_SYMBOL(hpsb_nodeid_get_entry);
-EXPORT_SYMBOL(hpsb_check_nodeid);
 EXPORT_SYMBOL(hpsb_node_fill_packet);
 EXPORT_SYMBOL(hpsb_node_read);
 EXPORT_SYMBOL(hpsb_node_write);

drivers/ieee1394/iso.c

@@ -47,8 +47,11 @@ static struct hpsb_iso* hpsb_iso_common_init(struct hpsb_host *host, enum hpsb_i
 	int dma_direction;
 
 	/* make sure driver supports the ISO API */
-	if(!host->driver->isoctl)
+	if(!host->driver->isoctl) {
+		printk(KERN_INFO "ieee1394: host driver '%s' does not support the rawiso API\n",
+		       host->driver->name);
 		return NULL;
+	}
 
 	/* sanitize parameters */
 

drivers/ieee1394/nodemgr.c

@@ -1616,18 +1616,6 @@ struct node_entry *hpsb_nodeid_get_entry(struct hpsb_host *host, nodeid_t nodeid
 	return ne;
 }
 
-struct node_entry *hpsb_check_nodeid(struct hpsb_host *host, nodeid_t nodeid)
-{
-	struct node_entry *ne;
-
-	if (down_trylock(&nodemgr_serialize))
-		return NULL;
-	ne = find_entry_by_nodeid(host, nodeid);
-	up(&nodemgr_serialize);
-
-	return ne;
-}
-
 /* The following four convenience functions use a struct node_entry
  * for addressing a node on the bus.  They are intended for use by any
  * process context, not just the nodemgr thread, so we need to be a

drivers/ieee1394/nodemgr.h

@@ -163,10 +163,6 @@ struct node_entry *hpsb_guid_get_entry(u64 guid);
  * fool-proof by itself, since the nodeid can change.  */
 struct node_entry *hpsb_nodeid_get_entry(struct hpsb_host *host, nodeid_t nodeid);
 
-/* Same as above except that it will not block waiting for the nodemgr
- * serialize semaphore.  */
-struct node_entry *hpsb_check_nodeid(struct hpsb_host *host, nodeid_t nodeid);
-
 /*
  * If the entry refers to a local host, this function will return the pointer
  * to the hpsb_host structure.  It will return NULL otherwise.  Once you have

drivers/ieee1394/ohci1394.c

@@ -165,7 +165,7 @@ printk(level "%s: " fmt "\n" , OHCI1394_DRIVER_NAME , ## args)
 printk(level "%s_%d: " fmt "\n" , OHCI1394_DRIVER_NAME, card , ## args)
 
 static char version[] __devinitdata =
-	"$Rev: 866 $ Ben Collins <bcollins@debian.org>";
+	"$Rev: 897 $ Ben Collins <bcollins@debian.org>";
 
 /* Module Parameters */
 static int phys_dma = 1;

drivers/ieee1394/pcilynx.c

@@ -1163,7 +1163,7 @@ static ssize_t mem_write(struct file *file, const char *buffer, size_t count,
  ********************************************************/
 
 
-static void lynx_irq_handler(int irq, void *dev_id,
+static irqreturn_t lynx_irq_handler(int irq, void *dev_id,
                              struct pt_regs *regs_are_unused)
 {
         struct ti_lynx *lynx = (struct ti_lynx *)dev_id;
@@ -1174,7 +1174,8 @@ static void lynx_irq_handler(int irq, void *dev_id,
         linkint = reg_read(lynx, LINK_INT_STATUS);
         intmask = reg_read(lynx, PCI_INT_STATUS);
 
-        if (!(intmask & PCI_INT_INT_PEND)) return;
+        if (!(intmask & PCI_INT_INT_PEND))
+		return IRQ_HANDLED;
 
         PRINTD(KERN_DEBUG, lynx->id, "interrupt: 0x%08x / 0x%08x", intmask,
                linkint);
@@ -1390,6 +1391,8 @@ static void lynx_irq_handler(int irq, void *dev_id,
 
                 run_pcl(lynx, lynx->rcv_pcl_start, CHANNEL_ASYNC_RCV);
         }
+
+	return IRQ_HANDLED;
 }
 
 
@@ -1893,7 +1896,7 @@ static struct pci_driver lynx_pci_driver = {
         .name =     PCILYNX_DRIVER_NAME,
         .id_table = pci_table,
         .probe =    add_card,
-        .remove =   __devexit_p(remove_card),
+        .remove =   remove_card,
 };
 
 static struct hpsb_host_driver lynx_driver = {

drivers/ieee1394/sbp2.c

@@ -298,7 +298,7 @@
 #include "sbp2.h"
 
 static char version[] __devinitdata =
-	"$Rev: 884 $ James Goodwin <jamesg@filanet.com>";
+	"$Rev: 896 $ James Goodwin <jamesg@filanet.com>";
 
 /*
  * Module load parameter definitions

drivers/ieee1394/video1394.c

@@ -67,14 +67,6 @@
 #define vmalloc_32(x) vmalloc(x)
 #endif
 
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,3))
-#define remap_page_range_1394(vma, start, addr, size, prot) \
-	remap_page_range(start, addr, size, prot)
-#else
-#define remap_page_range_1394(vma, start, addr, size, prot) \
-	remap_page_range(vma, start, addr, size, prot)
-#endif
-
 struct it_dma_prg {
 	struct dma_cmd begin;
 	quadlet_t data[4];
@@ -496,11 +488,7 @@ void wakeup_dma_ir_ctx(unsigned long l)
 		if (d->ir_prg[i][d->nb_cmd-1].status & cpu_to_le32(0xFFFF0000)) {
 			reset_ir_status(d, i);
 			d->buffer_status[i] = VIDEO1394_BUFFER_READY;
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,18)
-			get_fast_time(&d->buffer_time[i]);
-#else
 			do_gettimeofday(&d->buffer_time[i]);
-#endif
 		}
 	}