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From: Dan Carpenter <dan.carpenter@oracle.com>
To: Felipe Balbi <balbi@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	linux-usb@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [PATCH 1/2] usb: phy: ab8500: silence some uninitialized variable warnings
Date: Thu, 18 Oct 2018 08:04:00 +0000	[thread overview]
Message-ID: <20181018080400.2ffpzzyy6svvppzb@kili.mountain> (raw)

Smatch complains that "reg" can be uninitialized if the
abx500_get_register_interruptible() call fails.  It's an interruptable
function, so we should check if the user presses CTRL-C.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 drivers/usb/phy/phy-ab8500-usb.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/phy/phy-ab8500-usb.c b/drivers/usb/phy/phy-ab8500-usb.c
index 66143ab8c043..aaf363f19714 100644
--- a/drivers/usb/phy/phy-ab8500-usb.c
+++ b/drivers/usb/phy/phy-ab8500-usb.c
@@ -505,15 +505,19 @@ static int abx500_usb_link_status_update(struct ab8500_usb *ab)
 	if (is_ab8500(ab->ab8500)) {
 		enum ab8500_usb_link_status lsts;
 
-		abx500_get_register_interruptible(ab->dev,
+		ret = abx500_get_register_interruptible(ab->dev,
 				AB8500_USB, AB8500_USB_LINE_STAT_REG, &reg);
+		if (ret < 0)
+			return ret;
 		lsts = (reg >> 3) & 0x0F;
 		ret = ab8500_usb_link_status_update(ab, lsts);
 	} else if (is_ab8505(ab->ab8500)) {
 		enum ab8505_usb_link_status lsts;
 
-		abx500_get_register_interruptible(ab->dev,
+		ret = abx500_get_register_interruptible(ab->dev,
 				AB8500_USB, AB8505_USB_LINE_STAT_REG, &reg);
+		if (ret < 0)
+			return ret;
 		lsts = (reg >> 3) & 0x1F;
 		ret = ab8505_usb_link_status_update(ab, lsts);
 	}
-- 
2.11.0

WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <dan.carpenter@oracle.com>
To: Felipe Balbi <balbi@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	linux-usb@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [1/2] usb: phy: ab8500: silence some uninitialized variable warnings
Date: Thu, 18 Oct 2018 11:04:00 +0300	[thread overview]
Message-ID: <20181018080400.2ffpzzyy6svvppzb@kili.mountain> (raw)

Smatch complains that "reg" can be uninitialized if the
abx500_get_register_interruptible() call fails.  It's an interruptable
function, so we should check if the user presses CTRL-C.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 drivers/usb/phy/phy-ab8500-usb.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/phy/phy-ab8500-usb.c b/drivers/usb/phy/phy-ab8500-usb.c
index 66143ab8c043..aaf363f19714 100644
--- a/drivers/usb/phy/phy-ab8500-usb.c
+++ b/drivers/usb/phy/phy-ab8500-usb.c
@@ -505,15 +505,19 @@ static int abx500_usb_link_status_update(struct ab8500_usb *ab)
 	if (is_ab8500(ab->ab8500)) {
 		enum ab8500_usb_link_status lsts;
 
-		abx500_get_register_interruptible(ab->dev,
+		ret = abx500_get_register_interruptible(ab->dev,
 				AB8500_USB, AB8500_USB_LINE_STAT_REG, &reg);
+		if (ret < 0)
+			return ret;
 		lsts = (reg >> 3) & 0x0F;
 		ret = ab8500_usb_link_status_update(ab, lsts);
 	} else if (is_ab8505(ab->ab8500)) {
 		enum ab8505_usb_link_status lsts;
 
-		abx500_get_register_interruptible(ab->dev,
+		ret = abx500_get_register_interruptible(ab->dev,
 				AB8500_USB, AB8505_USB_LINE_STAT_REG, &reg);
+		if (ret < 0)
+			return ret;
 		lsts = (reg >> 3) & 0x1F;
 		ret = ab8505_usb_link_status_update(ab, lsts);
 	}

             reply	other threads:[~2018-10-18  8:04 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-18  8:04 Dan Carpenter [this message]
2018-10-18  8:04 ` [1/2] usb: phy: ab8500: silence some uninitialized variable warnings Dan Carpenter

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