The patch titled
ibmphp: read the length of ebda and map entire ebda region
has been added to the -mm tree. Its filename is
ibmphp-read-the-length-of-ebda-and-map-entire-ebda-region.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: ibmphp: read the length of ebda and map entire ebda region
From: Chandru <chandru@xxxxxxxxxx>
ibmphp driver currently maps only 1KB of ebda memory area into kernel
address space during driver initialization. This causes kernel oops when
the driver is modprobe'd and it accesses memory area beyond 1KB within
ebda segment. The first byte of ebda segment actually stores the length
of the ebda region in Kilobytes. Hence make use of the length parameter
and map the entire ebda region.
Signed-off-by: Chandru Siddalingappa <chandru@xxxxxxxxxxxxxxxxxx>
Cc: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/pci/hotplug/ibmphp_ebda.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff -puN drivers/pci/hotplug/ibmphp_ebda.c~ibmphp-read-the-length-of-ebda-and-map-entire-ebda-region drivers/pci/hotplug/ibmphp_ebda.c
--- a/drivers/pci/hotplug/ibmphp_ebda.c~ibmphp-read-the-length-of-ebda-and-map-entire-ebda-region
+++ a/drivers/pci/hotplug/ibmphp_ebda.c
@@ -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;
_
Patches currently in -mm which might be from chandru@xxxxxxxxxx are
ibmphp-read-the-length-of-ebda-and-map-entire-ebda-region.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
