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s390/ap: add error response code field for ap queue devices

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On AP instruction failures the last response code is now
kept in the struct ap_queue. There is also a new sysfs
attribute showing this field (enabled only on debug kernels).

Also slight rework of the AP_DBF macros to get some more
content into one debug feature message line.

Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Harald Freudenberger
2020-07-02 15:56:15 +02:00
committed by Vasily Gorbik
parent 0b641cbd24
commit 2ea2a6099a
4 changed files with 101 additions and 26 deletions
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drivers/s390/crypto/ap_bus.h
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@@ -190,6 +190,7 @@ struct ap_queue {
struct list_head requestq; /* List of message yet to be sent. */
struct ap_message *reply; /* Per device reply message. */
enum ap_sm_state sm_state; /* ap queue state machine state */
int last_err_rc; /* last error state response code */
};
#define to_ap_queue(x) container_of((x), struct ap_queue, ap_dev.device)