回复: [PATCH] usb: gadget: function: fix missing spinlock in f_uac1_legacy

[Zhang, Qiang]

________________________________________
发件人: linux-kernel-ow...@vger.kernel.org <linux-kernel-ow...@vger.kernel.org> 代表 
qiang.zh...@windriver.com <qiang.zh...@windriver.com>
发送时间: 2020年7月5日 9:59
收件人: ba...@kernel.org
抄送: gre...@linuxfoundation.org; colin.k...@canonical.com; 
linux-...@vger.kernel.org; linux-kernel@vger.kernel.org
主题: [PATCH] usb: gadget: function: fix missing spinlock in f_uac1_legacy

From: Zhang Qiang <qiang.zh...@windriver.com>

Signed-off-by: Zhang Qiang <qiang.zh...@windriver.com>
---
 drivers/usb/gadget/function/f_uac1_legacy.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/gadget/function/f_uac1_legacy.c 
b/drivers/usb/gadget/function/f_uac1_legacy.c
index 349deae7cabd..e2d7f69128a0 100644
--- a/drivers/usb/gadget/function/f_uac1_legacy.c
+++ b/drivers/usb/gadget/function/f_uac1_legacy.c
@@ -336,7 +336,9 @@ static int f_audio_out_ep_complete(struct usb_ep *ep, 
struct usb_request *req)

        /* Copy buffer is full, add it to the play_queue */
        if (audio_buf_size - copy_buf->actual < req->actual) {
+               spin_lock_irq(&audio->lock);
                list_add_tail(&copy_buf->list, &audio->play_queue);
+               spin_unlock_irq(&audio->lock);
                schedule_work(&audio->playback_work);
                copy_buf = f_audio_buffer_alloc(audio_buf_size);
                if (IS_ERR(copy_buf))
--
2.24.1