linux-kernel - [PATCH 4/4] um: irq: Restore O

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Date:   Sat,  1 Jan 2022 22:58:10 +0100
From:   Richard Weinberger <richard@....at>
To:     linux-um@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, johannes.berg@...el.com,
        anton.ivanov@...bridgegreys.com,
        Richard Weinberger <richard@....at>
Subject: [PATCH 4/4] um: irq: Restore O_ASYNC upon exit

Just like with O_NONBLOCK, make sure UML clears O_ASYNC
upon exit when it set it.

Signed-off-by: Richard Weinberger <richard@....at>
---
 arch/um/kernel/irq.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c
index a8873d9bc28b..e020bdccfa23 100644
--- a/arch/um/kernel/irq.c
+++ b/arch/um/kernel/irq.c
@@ -342,6 +342,7 @@ static void free_irq_by_irq_and_dev(unsigned int irq, void *dev)
 				continue;
 
 			os_del_epoll_fd(entry->fd);
+			os_clear_fd_async(entry->fd);
 			reg->events = 0;
 			update_or_free_irq_entry(entry);
 			goto out;
@@ -396,8 +397,10 @@ int deactivate_all_fds(void)
 	os_set_ioignore();
 
 	/* we can no longer call kfree() here so just deactivate */
-	list_for_each_entry(entry, &active_fds, list)
+	list_for_each_entry(entry, &active_fds, list) {
 		os_del_epoll_fd(entry->fd);
+		os_clear_fd_async(entry->fd);
+	}
 	os_close_epoll_fd();
 	return 0;
 }
-- 
2.26.2