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USB: serial: cast sizeof() to int when comparing with error code

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Negative error code will be larger than sizeof().

Note that none of these bugs prevent errors from being detected, even if
the ir-usb one would cause a less precise debug message to printed.

Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
[ johan: add comment about implications ]
Signed-off-by: Johan Hovold <johan@kernel.org>
This commit is contained in:
Chengguang Xu 2018-06-25 15:35:18 +08:00 committed by Johan Hovold
parent 7daf201d7f
commit 3391ca1dcd
3 changed files with 3 additions and 3 deletions
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2
drivers/usb/serial/ir-usb.c
View File

@ -132,7 +132,7 @@ irda_usb_find_class_desc(struct usb_serial *serial, unsigned int ifnum)
0, ifnum, desc, sizeof(*desc), 1000);
dev_dbg(&serial->dev->dev, "%s - ret=%d\n", __func__, ret);
if (ret < sizeof(*desc)) {
if (ret < (int)sizeof(*desc)) {
dev_dbg(&serial->dev->dev,
"%s - class descriptor read %s (%d)\n", __func__,
(ret < 0) ? "failed" : "too short", ret);

2
drivers/usb/serial/quatech2.c
View File

@ -194,7 +194,7 @@ static inline int qt2_getregister(struct usb_device *dev,
ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
QT_SET_GET_REGISTER, 0xc0, reg,
uart, data, sizeof(*data), QT2_USB_TIMEOUT);
if (ret < sizeof(*data)) {
if (ret < (int)sizeof(*data)) {
if (ret >= 0)
ret = -EIO;
}

2
drivers/usb/serial/ssu100.c
View File

@ -104,7 +104,7 @@ static inline int ssu100_getregister(struct usb_device *dev,
ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
QT_SET_GET_REGISTER, 0xc0, reg,
uart, data, sizeof(*data), 300);
if (ret < sizeof(*data)) {
if (ret < (int)sizeof(*data)) {
if (ret >= 0)
ret = -EIO;
}