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s390/ap: fix status returned by ap_aqic() 

There function ap_aqic() tries to grab the status from the
wrong part of the register. Thus we always end up with
zeros. Which is wrong, among others, because we detect
failures via status.response_code.

Signed-off-by: Halil Pasic <pasic@linux.ibm.com>
Reported-by: Janosch Frank <frankja@linux.ibm.com>
Fixes: 159491f3b5 ("s390/ap: rework assembler functions to use unions for in/out register variables")
Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Halil Pasic 2023-02-09 00:00:23 +01:00 committed by Heiko Carstens
parent a64a6d2387
commit 394740d764
1 changed files with 5 additions and 2 deletions
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7
arch/s390/include/asm/ap.h
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@ -239,7 +239,10 @@ static inline struct ap_queue_status ap_aqic(ap_qid_t qid,
union {
unsigned long value;
struct ap_qirq_ctrl qirqctrl;
struct ap_queue_status status;
struct {
u32 _pad;
struct ap_queue_status status;
};
} reg1;
unsigned long reg2 = pa_ind;
@ -253,7 +256,7 @@ static inline struct ap_queue_status ap_aqic(ap_qid_t qid,
" lgr %[reg1],1\n" /* gr1 (status) into reg1 */
: [reg1] "+&d" (reg1)
: [reg0] "d" (reg0), [reg2] "d" (reg2)
: "cc", "0", "1", "2");
: "cc", "memory", "0", "1", "2");
return reg1.status;
}