| Message ID | 20180625073518.6916-1-cgxu519@gmx.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Mon, Jun 25, 2018 at 03:35:18PM +0800, Chengguang Xu wrote:
> Negative error code will be larger than sizeof().
Good catch!
I was gonna ask you to submit this as three separate patches to
facilitate stable backports, but fortunately it appears none of these
have any bad implications (besides possibly the ir-usb one printing a
less descriptive debug message).
So I'll queue this one of up for -next.
Thanks,
Johan
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diff --git a/drivers/usb/serial/ir-usb.c b/drivers/usb/serial/ir-usb.c index 24b06c7e5e2d..7643716b5299 100644 --- a/drivers/usb/serial/ir-usb.c +++ b/drivers/usb/serial/ir-usb.c @@ -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); diff --git a/drivers/usb/serial/quatech2.c b/drivers/usb/serial/quatech2.c index 958e12e1e7c7..ff2322ea5e14 100644 --- a/drivers/usb/serial/quatech2.c +++ b/drivers/usb/serial/quatech2.c @@ -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; } diff --git a/drivers/usb/serial/ssu100.c b/drivers/usb/serial/ssu100.c index 2083c267787b..0900b47b5f57 100644 --- a/drivers/usb/serial/ssu100.c +++ b/drivers/usb/serial/ssu100.c @@ -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; }
Negative error code will be larger than sizeof(). Signed-off-by: Chengguang Xu <cgxu519@gmx.com> --- drivers/usb/serial/ir-usb.c | 2 +- drivers/usb/serial/quatech2.c | 2 +- drivers/usb/serial/ssu100.c | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-)