linux-kernel - [PATCH v2] usb: typec: Fix fast_role_swap

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Message-ID: <20230607193328.3359487-1-pholla@chromium.org>
Date:   Wed,  7 Jun 2023 19:33:26 +0000
From:   Pavan Holla <pholla@...omium.org>
To:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     bleung@...omium.org, pmalani@...omium.org,
        Pavan Holla <pholla@...omium.org>, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2] usb: typec: Fix fast_role_swap_current show function

The current implementation mistakenly performs a & operation on
the output of sysfs_emit. This patch performs the & operation before
calling sysfs_emit.

Fixes: 662a60102c12 ("usb: typec: Separate USB Power Delivery from USB Type-C")
Reported-by: Benson Leung <bleung@...omium.org>
Signed-off-by: Pavan Holla <pholla@...omium.org>
---
 drivers/usb/typec/pd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/typec/pd.c b/drivers/usb/typec/pd.c
index 0bcde1ff4d39..8cc66e4467c4 100644
--- a/drivers/usb/typec/pd.c
+++ b/drivers/usb/typec/pd.c
@@ -95,7 +95,7 @@ peak_current_show(struct device *dev, struct device_attribute *attr, char *buf)
 static ssize_t
 fast_role_swap_current_show(struct device *dev, struct device_attribute *attr, char *buf)
 {
-	return sysfs_emit(buf, "%u\n", to_pdo(dev)->pdo >> PDO_FIXED_FRS_CURR_SHIFT) & 3;
+	return sysfs_emit(buf, "%u\n", (to_pdo(dev)->pdo >> PDO_FIXED_FRS_CURR_SHIFT) & 3);
 }
 static DEVICE_ATTR_RO(fast_role_swap_current);
 
-- 
2.41.0.rc0.172.g3f132b7071-goog