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usb: gadget: remove leaked entry from udc driver list 

The usb_add_gadget_udc will add a new gadget to the udc class
driver list. Not calling usb_del_gadget_udc in error branch
will result in residual gadget entry in the udc driver list.
We fix it by calling usb_del_gadget_udc to clean it when error
return.

Fixes: 48ba02b2e2 ("usb: gadget: add udc driver for max3420")
Acked-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
Link: https://lore.kernel.org/r/20210727073142.84666-1-zhangqilong3@huawei.com
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Zhang Qilong 2021-07-27 15:31:42 +08:00 committed by Greg Kroah-Hartman
parent 30fad76ce4
commit fa4a8dcfd5
1 changed files with 10 additions and 4 deletions
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14
drivers/usb/gadget/udc/max3420_udc.c
View File

@ -1255,12 +1255,14 @@ static int max3420_probe(struct spi_device *spi)
err = devm_request_irq(&spi->dev, irq, max3420_irq_handler, 0,
"max3420", udc);
if (err < 0)
return err;
goto del_gadget;
udc->thread_task = kthread_create(max3420_thread, udc,
"max3420-thread");
if (IS_ERR(udc->thread_task))
return PTR_ERR(udc->thread_task);
if (IS_ERR(udc->thread_task)) {
err = PTR_ERR(udc->thread_task);
goto del_gadget;
}
irq = of_irq_get_byname(spi->dev.of_node, "vbus");
if (irq <= 0) { /* no vbus irq implies self-powered design */
@ -1280,10 +1282,14 @@ static int max3420_probe(struct spi_device *spi)
err = devm_request_irq(&spi->dev, irq,
max3420_vbus_handler, 0, "vbus", udc);
if (err < 0)
return err;
goto del_gadget;
}
return 0;
del_gadget:
usb_del_gadget_udc(&udc->gadget);
return err;
}
static int max3420_remove(struct spi_device *spi)