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[S390] zcrypt: fix possible dead lock in AP bus module

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AP bus module uses bus_for_each_dev() in software interrupt context to
poll for completed requests which might cause dead locks. Solution: use
private AP device list for polling in software interrupt context.

Signed-off-by: Ralph Wuerthner <rwuerthn@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Ralph Wuerthner
2007-03-19 13:19:14 +01:00
committed by Martin Schwidefsky
parent fb1c171992
commit cf352ce0b9
2 changed files with 24 additions and 7 deletions
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1
drivers/s390/crypto/ap_bus.h
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@ -106,6 +106,7 @@ struct ap_device {
struct device device;
struct ap_driver *drv; /* Pointer to AP device driver. */
spinlock_t lock; /* Per device lock. */
struct list_head list; /* private list of all AP devices. */
ap_qid_t qid; /* AP queue id. */
int queue_depth; /* AP queue depth.*/