[PATCH] usb: gadget: Add check devm_kasprintf() returned value

[Charles Han]

devm_kasprintf() can return a NULL pointer on failure but this
returned value in ast_vhub_init_dev() is not checked.

Fixes: 7ecca2a4080c ("usb/gadget: Add driver for Aspeed SoC virtual hub")
Signed-off-by: Charles Han <hanchunchao at inspur.com>
---
 drivers/usb/gadget/udc/aspeed-vhub/dev.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/usb/gadget/udc/aspeed-vhub/dev.c b/drivers/usb/gadget/udc/aspeed-vhub/dev.c
index 573109ca5b79..a09f72772e6e 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/dev.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/dev.c
@@ -548,6 +548,9 @@ int ast_vhub_init_dev(struct ast_vhub *vhub, unsigned int idx)
 	d->vhub = vhub;
 	d->index = idx;
 	d->name = devm_kasprintf(parent, GFP_KERNEL, "port%d", idx+1);
+	if (!d->name)
+		return -ENOMEM;
+
 	d->regs = vhub->regs + 0x100 + 0x10 * idx;
 
 	ast_vhub_init_ep0(vhub, &d->ep0, d);
-- 
2.31.1