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s390x/css: catch ccw sequence errors

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We must not allow chains of more than 255 ccws without data transfer.

Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Cornelia Huck 2014-09-05 09:33:18 +02:00 • committed by Christian Borntraeger
parent a327c9215d
commit e8601dd5d0
2 changed files with 11 additions and 0 deletions
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hw/s390x/css.h
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@ -78,6 +78,7 @@ struct SubchDev {
bool last_cmd_valid;
bool ccw_fmt_1;
bool thinint_active;
uint8_t ccw_no_data_cnt;
/* transport-provided data: */
int (*ccw_cb) (SubchDev *, CCW1);
SenseId id;