usb: isp1760: Use kasprintf

Use kasprintf instead of combination of kmalloc and sprintf and
therefore avoid unnecessary computation of string length.
Also, remove the useless local variable.

Signed-off-by: Himanshu Jha <himanshujha199640@gmail.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 1 insertions, 5 deletions

diff --git a/drivers/usb/isp1760/isp1760-udc.c b/drivers/usb/isp1760/isp1760-udc.c
index bac4ef5d9512..1714b2258b54 100644
--- a/drivers/usb/isp1760/isp1760-udc.c
+++ b/drivers/usb/isp1760/isp1760-udc.c
@@ -1441,7 +1441,6 @@ int isp1760_udc_register(struct isp1760_device *isp, int irq,
                          unsigned long irqflags)
 {
         struct isp1760_udc *udc = &isp->udc;
-        const char *devname;
         int ret;
 
         udc->irq = -1;
@@ -1455,13 +1454,10 @@ int isp1760_udc_register(struct isp1760_device *isp, int irq,
         if (ret < 0)
                 return ret;
 
-        devname = dev_name(isp->dev);
-        udc->irqname = kmalloc(strlen(devname) + 7, GFP_KERNEL);
+        udc->irqname = kasprintf(GFP_KERNEL, "%s (udc)", dev_name(isp->dev));
         if (!udc->irqname)
                 return -ENOMEM;
 
-        sprintf(udc->irqname, "%s (udc)", devname);
-
         ret = request_irq(irq, isp1760_udc_irq, IRQF_SHARED | irqflags,
                           udc->irqname, udc);
         if (ret < 0)