[PATCH] I2O: fix possible race condition and minor improvements

- I2O Block OSM contained a possible race condition (by Wolfram Joost)
- In pci.c the memory area which will be synced was wrong (original from
   Wolfram Joost)
- number of OSM's which could be loaded is increased from 4 to 8
Signed-off-by: Markus Lidel <Markus.Lidel@shadowconnect.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/message/i2o/i2o_block.c

@@ -877,11 +877,11 @@ static int i2o_block_transfer(struct request *req)
 		 (unsigned long)&msg->u.head[0]) >> 2) | SGL_OFFSET_8,
 	       &msg->u.head[0]);
 
-	i2o_msg_post(c, m);
-
 	list_add_tail(&ireq->queue, &dev->open_queue);
 	dev->open_queue_depth++;
 
+	i2o_msg_post(c, m);
+
 	return 0;
 
       context_remove:

drivers/message/i2o/pci.c

@@ -303,7 +303,7 @@ static irqreturn_t i2o_pci_interrupt(int irq, void *dev_id, struct pt_regs *r)
 		 *      Ensure this message is seen coherently but cachably by
 		 *      the processor
 		 */
-		dma_sync_single_for_cpu(dev, c->out_queue.phys, MSG_FRAME_SIZE,
+		dma_sync_single_for_cpu(dev, mv, MSG_FRAME_SIZE * 4,
 					PCI_DMA_FROMDEVICE);
 
 		/* dispatch it */

include/linux/i2o.h

@@ -23,7 +23,7 @@
 #include <linux/i2o-dev.h>
 
 /* How many different OSM's are we allowing */
-#define I2O_MAX_DRIVERS		4
+#define I2O_MAX_DRIVERS		8
 
 #include <asm/io.h>
 #include <asm/semaphore.h>	/* Needed for MUTEX init macros */