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arch_cpu_read_write_register: error return fix.

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Fixed an issue where errors generated in arch_cpu_read_write_register()
are not transmitted to the caller.

Change-Id: I05d7d872eab834918220cf18f628aee37208a156
Fujitsu: POSTK_DEBUG_TEMP_FIX_94
This commit is contained in:
Shiratori, Takehiro
2018-10-16 20:09:47 +09:00
committed by Dominique Martinet
parent 583cb94667
commit 190039f5d9
1 changed files with 9 additions and 0 deletions
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9
executer/kernel/mcctrl/control.c
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@@ -3284,6 +3284,7 @@ long __mcctrl_control(ihk_os_t os, unsigned int req, unsigned long arg,
struct mcctrl_os_cpu_response {
int done;
unsigned long val;
int err;
wait_queue_head_t wq;
};
@@ -3362,6 +3363,7 @@ void mcctrl_os_read_write_cpu_response(ihk_os_t os,
resp->val = pisp->desc.val;
resp->done = 1;
resp->err = pisp->err;
wake_up_interruptible(&resp->wq);
}
@@ -3380,6 +3382,7 @@ int __mcctrl_os_read_write_cpu_register(ihk_os_t os, int cpu,
isp.resp = &resp;
resp.done = 0;
resp.err = 0;
init_waitqueue_head(&resp.wq);
mb();
@@ -3396,6 +3399,12 @@ int __mcctrl_os_read_write_cpu_register(ihk_os_t os, int cpu,
goto out;
}
ret = resp.err;
if (ret != 0) {
printk("%s: ERROR receive: %d\n", __FUNCTION__, resp.err);
goto out;
}
/* Update if read */
if (ret == 0 && op == MCCTRL_OS_CPU_READ_REGISTER) {
desc->val = resp.val;