linux-kernel - [PATCH v3] staging: fieldbus: core: fix ->poll() annotation

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Date:   Tue, 21 May 2019 10:20:09 -0400
From:   Sven Van Asbroeck <thesven73@...il.com>
To:     Oscar Gomez Fuente <oscargomezf@...il.com>
Cc:     Greg KH <gregkh@...uxfoundation.org>, devel@...verdev.osuosl.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH v3] staging: fieldbus: core: fix ->poll() annotation

From: Oscar Gomez Fuente <oscargomezf@...il.com>

->poll() functions should return __poll_t, but the fieldbus
core's poll() does not. This generates a sparse warning.

Fix the ->poll() return value, and use recommended __poll_t
constants (EPOLLxxx).

Signed-off-by: Oscar Gomez Fuente <oscargomezf@...il.com>
---
 drivers/staging/fieldbus/dev_core.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/fieldbus/dev_core.c b/drivers/staging/fieldbus/dev_core.c
index 60b85140675a..f6f5b92ba914 100644
--- a/drivers/staging/fieldbus/dev_core.c
+++ b/drivers/staging/fieldbus/dev_core.c
@@ -211,16 +211,16 @@ static ssize_t fieldbus_write(struct file *filp, const char __user *buf,
 	return fbdev->write_area(fbdev, buf, size, offset);
 }
 
-static unsigned int fieldbus_poll(struct file *filp, poll_table *wait)
+static __poll_t fieldbus_poll(struct file *filp, poll_table *wait)
 {
 	struct fb_open_file *of = filp->private_data;
 	struct fieldbus_dev *fbdev = of->fbdev;
-	unsigned int mask = POLLIN | POLLRDNORM | POLLOUT | POLLWRNORM;
+	__poll_t mask = EPOLLIN | EPOLLRDNORM | EPOLLOUT | EPOLLWRNORM;
 
 	poll_wait(filp, &fbdev->dc_wq, wait);
 	/* data changed ? */
 	if (fbdev->dc_event != of->dc_event)
-		mask |= POLLPRI | POLLERR;
+		mask |= EPOLLPRI | EPOLLERR;
 	return mask;
 }
 
-- 
2.17.1