usb: gadget: udc: atmel: remove memory leak

[ Upstream commit 32856eea7bf75dfb99b955ada6e147f553a11366 ]

Commit bbe097f092b0 ("usb: gadget: udc: atmel: fix endpoint name")
introduced a memory leak when unbinding the driver. The endpoint names
would not be freed. Solve that by including the name as a string in struct
usba_ep so it is freed when the endpoint is.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2 files changed, 3 insertions, 1 deletions

diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c
index 45bc997d0711..a95b3e75f750 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.c
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.c
@@ -1978,7 +1978,8 @@ static struct usba_ep * atmel_udc_of_init(struct platform_device *pdev,
                         dev_err(&pdev->dev, "of_probe: name error(%d)\n", ret);
                         goto err;
                 }
-                ep->ep.name = kasprintf(GFP_KERNEL, "ep%d", ep->index);
+                sprintf(ep->name, "ep%d", ep->index);
+                ep->ep.name = ep->name;
 
                 ep->ep_regs = udc->regs + USBA_EPT_BASE(i);
                 ep->dma_regs = udc->regs + USBA_DMA_BASE(i);
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.h b/drivers/usb/gadget/udc/atmel_usba_udc.h
index 3e1c9d589dfa..b03b2ebfc53a 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.h
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.h
@@ -280,6 +280,7 @@ struct usba_ep {
         void __iomem                            *ep_regs;
         void __iomem                            *dma_regs;
         void __iomem                            *fifo;
+        char                                    name[8];
         struct usb_ep                           ep;
         struct usba_udc                         *udc;