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tty: hvc_console: Call hvc_kick in hvc_write unconditionally

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commit cfd956dcb101aa3d25bac321fae923323a47c607 upstream.

After hvc_write completes, call hvc_kick also in the case the output
buffer has been drained, to ensure tty_wakeup gets called.

This fixes that functions which wait for a drained buffer got stuck
occasionally.

Cc: stable <stable@kernel.org>
Closes: https://bugzilla.opensuse.org/show_bug.cgi?id=1230062
Signed-off-by: Fabian Vogt <fvogt@suse.de>
Link: https://lore.kernel.org/r/2011735.PYKUYFuaPT@fvogt-thinkpad
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Fabian Vogt 2025-08-15 13:33:28 +02:00 • committed by Greg Kroah-Hartman
commit 931ee32721
1 changed files with 3 additions and 3 deletions
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6
drivers/tty/hvc/hvc_console.c
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@ -543,10 +543,10 @@ static int hvc_write(struct tty_struct *tty, const unsigned char *buf, int count
}
/*
* Racy, but harmless, kick thread if there is still pending data.
* Kick thread to flush if there's still pending data
* or to wakeup the write queue.
*/
if (hp->n_outbuf)
hvc_kick();
hvc_kick();
return written;
}