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lib: sbi: Put event after use in sbi_sse_exit() loop

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Currently, the sbi_sse_exit() gets event in a loop but does not put
it back after use. This results in global events remaining locked
causing hangs on sub-sequent calls to sse_event_get() for global
events.

Fixes: c8cdf01d8f ("lib: sbi: Add support for Supervisor Software Events extension")
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Himanshu Chauhan <hchauhan@ventanamicro.com>
This commit is contained in:
Anup Patel
2024-05-08 17:02:39 +05:30
committed by Anup Patel
parent ea9cf6aa28
commit 533067d182
1 changed files with 7 additions and 2 deletions
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9
lib/sbi/sbi_sse.c
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@@ -1121,13 +1121,18 @@ void sbi_sse_exit(struct sbi_scratch *scratch)
for (i = 0; i < EVENT_COUNT; i++) {
e = sse_event_get(supported_events[i]);
if (!e || e->attrs.hartid != current_hartid())
if (!e)
continue;
if (e->attrs.hartid != current_hartid())
goto skip;
if (sse_event_state(e) > SBI_SSE_STATE_REGISTERED) {
sbi_printf("Event %d in invalid state at exit", i);
sse_event_set_state(e, SBI_SSE_STATE_UNUSED);
}
skip:
sse_event_put(e);
}
}