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23 October 2021, 00:29:24 UTC
Revision 299c56966a72b9109d47c71a6db52097098703dd authored by Don Zickus on 08 February 2011, 04:25:00 UTC, committed by Ingo Molnar on 28 February 2011, 15:22:18 UTC 
x86: Use u32 instead of long to set reset vector back to 0
 
A customer of ours, complained that when setting the reset
vector back to 0, it trashed other data and hung their box.
They noticed when only 4 bytes were set to 0 instead of 8,
everything worked correctly.

Mathew pointed out:

 |
 | We're supposed to be resetting trampoline_phys_low and
 | trampoline_phys_high here, which are two 16-bit values.
 | Writing 64 bits is definitely going to overwrite space
 | that we're not supposed to be touching.
 |

So limit the area modified to u32.

Signed-off-by: Don Zickus <dzickus@redhat.com>
Acked-by: Matthew Garrett <mjg@redhat.com>
Cc: <stable@kernel.org>
LKML-Reference: <1297139100-424-1-git-send-email-dzickus@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
1 parent 493f335
History
Tip revision: 299c56966a72b9109d47c71a6db52097098703dd authored by Don Zickus on 08 February 2011, 04:25:00 UTC
x86: Use u32 instead of long to set reset vector back to 0
Tip revision: 299c569
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