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[IA64] mca_drv: Add minstate validation 

MCA driver can cause panic if kernel gets a state info with no minstate.
This patch adds minstate validation before handling it.

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Hidetoshi Seto 2006-02-09 14:42:55 -08:00 committed by Tony Luck
parent 1ff0be1534
commit a947464617
1 changed files with 3 additions and 0 deletions
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3
arch/ia64/kernel/mca_drv.c
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@ -437,6 +437,9 @@ recover_from_read_error(slidx_table_t *slidx,
* the process not have any locks of kernel.
*/
/* Is minstate valid? */
if (!peidx_bottom(peidx) || !(peidx_bottom(peidx)->valid.minstate))
return 0;
psr1 =(struct ia64_psr *)&(peidx_minstate_area(peidx)->pmsa_ipsr);
/*