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usb: misc: uss720: fix uninitialized variable rlen 

Smatch reports the following error: uninitialized symbol 'rlen'

drivers/usb/misc/uss720.c:514 parport_uss720_epp_write_data() error
drivers/usb/misc/uss720.c:575 parport_uss720_ecp_write_data() error
drivers/usb/misc/uss720.c:593 parport_uss720_ecp_read_data() error
drivers/usb/misc/uss720.c:626 parport_uss720_write_compat() error

The root cause is, the failure of usb_bulk_msg leads to the
uninitialized variable rlen in printk function.

Fix this by initializing rlen with zero.

Signed-off-by: Dongliang Mu <mudongliangabcd@gmail.com>
Link: https://lore.kernel.org/r/20220903100004.2874741-1-dzm91@hust.edu.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dongliang Mu 2022-09-03 18:00:01 +08:00 committed by Greg Kroah-Hartman
parent f57004b9d9
commit a8113da51c
1 changed files with 4 additions and 4 deletions
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8
drivers/usb/misc/uss720.c
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@ -502,7 +502,7 @@ static size_t parport_uss720_epp_write_data(struct parport *pp, const void *buf,
#else
struct parport_uss720_private *priv = pp->private_data;
struct usb_device *usbdev = priv->usbdev;
int rlen;
int rlen = 0;
int i;
if (!usbdev)
@ -563,7 +563,7 @@ static size_t parport_uss720_ecp_write_data(struct parport *pp, const void *buff
{
struct parport_uss720_private *priv = pp->private_data;
struct usb_device *usbdev = priv->usbdev;
int rlen;
int rlen = 0;
int i;
if (!usbdev)
@ -581,7 +581,7 @@ static size_t parport_uss720_ecp_read_data(struct parport *pp, void *buffer, siz
{
struct parport_uss720_private *priv = pp->private_data;
struct usb_device *usbdev = priv->usbdev;
int rlen;
int rlen = 0;
int i;
if (!usbdev)
@ -614,7 +614,7 @@ static size_t parport_uss720_write_compat(struct parport *pp, const void *buffer
{
struct parport_uss720_private *priv = pp->private_data;
struct usb_device *usbdev = priv->usbdev;
int rlen;
int rlen = 0;
int i;
if (!usbdev)