linux-kernel - [PATCH 4.19 015/639] soc: aspeed: Fix snoop_file

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Message-Id: <20200124093049.038099969@linuxfoundation.org>
Date:   Fri, 24 Jan 2020 10:23:05 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Luc Van Oostenryck <luc.vanoostenryck@...il.com>,
        Joel Stanley <joel@....id.au>,
        Andrew Jeffery <andrew@...id.au>,
        Olof Johansson <olof@...om.net>
Subject: [PATCH 4.19 015/639] soc: aspeed: Fix snoop_file_poll()s return type

From: Luc Van Oostenryck <luc.vanoostenryck@...il.com>

commit a4e55ccd4392e70f296d12e81b93c6ca96ee21d5 upstream.

snoop_file_poll() is defined as returning 'unsigned int' but the
.poll method is declared as returning '__poll_t', a bitwise type.

Fix this by using the proper return type and using the EPOLL
constants instead of the POLL ones, as required for __poll_t.

Link: https://lore.kernel.org/r/20191121051851.268726-1-joel@jms.id.au
Fixes: 3772e5da4454 ("drivers/misc: Aspeed LPC snoop output using misc chardev")
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@...il.com>
Reviewed-by: Joel Stanley <joel@....id.au>
Reviewed-by: Andrew Jeffery <andrew@...id.au>
Signed-off-by: Joel Stanley <joel@....id.au>
Signed-off-by: Olof Johansson <olof@...om.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/misc/aspeed-lpc-snoop.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/misc/aspeed-lpc-snoop.c
+++ b/drivers/misc/aspeed-lpc-snoop.c
@@ -101,13 +101,13 @@ static ssize_t snoop_file_read(struct fi
 	return ret ? ret : copied;
 }
 
-static unsigned int snoop_file_poll(struct file *file,
+static __poll_t snoop_file_poll(struct file *file,
 				    struct poll_table_struct *pt)
 {
 	struct aspeed_lpc_snoop_channel *chan = snoop_file_to_chan(file);
 
 	poll_wait(file, &chan->wq, pt);
-	return !kfifo_is_empty(&chan->fifo) ? POLLIN : 0;
+	return !kfifo_is_empty(&chan->fifo) ? EPOLLIN : 0;
 }
 
 static const struct file_operations snoop_fops = {