ibmphp : read the length of ebda and map entire ebda region

Commit Message

Chandru Jan. 11, 2010, 6:19 a.m. UTC

None

Patch

--- linux-2.6.33-rc2/drivers/pci/hotplug/ibmphp_ebda.c.orig	2010-01-09 15:23:54.000000000 +0530
+++ linux-2.6.33-rc2/drivers/pci/hotplug/ibmphp_ebda.c	2010-01-09 17:01:06.000000000 +0530
@@ -245,7 +245,7 @@  static void __init print_ebda_hpc (void)
 
 int __init ibmphp_access_ebda (void)
 {
-	u8 format, num_ctlrs, rio_complete, hs_complete;
+	u8 format, num_ctlrs, rio_complete, hs_complete, ebda_sz;
 	u16 ebda_seg, num_entries, next_offset, offset, blk_id, sub_addr, re, rc_id, re_id, base;
 	int rc = 0;
 
@@ -260,7 +260,14 @@  int __init ibmphp_access_ebda (void)
 	iounmap (io_mem);
 	debug ("returned ebda segment: %x\n", ebda_seg);
 	
-	io_mem = ioremap(ebda_seg<<4, 1024);
+	io_mem = ioremap(ebda_seg<<4, 1);
+	ebda_sz = readb(io_mem);
+	iounmap(io_mem);
+	debug("ebda size: %d(KiB)\n", ebda_sz);
+	if (ebda_sz == 0)
+		return -ENOMEM;
+
+	io_mem = ioremap(ebda_seg<<4, (ebda_sz * 1024));
 	if (!io_mem )
 		return -ENOMEM;
 	next_offset = 0x180;