usb: musb: Balance list entry in musb_gadget_queue

stable inclusion
from stable-5.10.79
commit 1309753b7841db412063bcce3f2a0eddf1443e9d
bugzilla: 185793 https://gitee.com/openeuler/kernel/issues/I4K65C

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=1309753b7841db412063bcce3f2a0eddf1443e9d



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commit 21b5fcdc upstream.

musb_gadget_queue() adds the passed request to musb_ep::req_list. If the
endpoint is idle and it is the first request then it invokes
musb_queue_resume_work(). If the function returns an error then the
error is passed to the caller without any clean-up and the request
remains enqueued on the list. If the caller enqueues the request again
then the list corrupts.

Remove the request from the list on error.

Fixes: ea2f35c0 ("usb: musb: Fix sleeping function called from invalid context for hdrc glue")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Viraj Shah <viraj.shah@linutronix.de>
Link: https://lore.kernel.org/r/20211021093644.4734-1-viraj.shah@linutronix.de


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Chen Jun <chenjun102@huawei.com>
Acked-by: Weilong Chen <chenweilong@huawei.com>

Signed-off-by: Bin Li <huawei.libin@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>