diff options
Diffstat (limited to 'drivers/usb/gadget/printer.c')
| -rw-r--r-- | drivers/usb/gadget/printer.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/usb/gadget/printer.c b/drivers/usb/gadget/printer.c index 35bcc83d1e0..6474081dcba 100644 --- a/drivers/usb/gadget/printer.c +++ b/drivers/usb/gadget/printer.c @@ -427,12 +427,17 @@ setup_rx_reqs(struct printer_dev *dev) req->length = USB_BUFSIZE; req->complete = rx_complete; + /* here, we unlock, and only unlock, to avoid deadlock. */ + spin_unlock(&dev->lock); error = usb_ep_queue(dev->out_ep, req, GFP_ATOMIC); + spin_lock(&dev->lock); if (error) { DBG(dev, "rx submit --> %d\n", error); list_add(&req->list, &dev->rx_reqs); break; - } else { + } + /* if the req is empty, then add it into dev->rx_reqs_active. */ + else if (list_empty(&req->list)) { list_add(&req->list, &dev->rx_reqs_active); } } @@ -688,7 +693,7 @@ static int printer_fsync(struct file *fd, loff_t start, loff_t end, int datasync) { struct printer_dev *dev = fd->private_data; - struct inode *inode = fd->f_path.dentry->d_inode; + struct inode *inode = file_inode(fd); unsigned long flags; int tx_list_empty; @@ -1133,6 +1138,7 @@ static int __init printer_bind_config(struct usb_configuration *c) NULL, "g_printer"); if (IS_ERR(dev->pdev)) { ERROR(dev, "Failed to create device: g_printer\n"); + status = PTR_ERR(dev->pdev); goto fail; } @@ -1157,7 +1163,7 @@ static int __init printer_bind_config(struct usb_configuration *c) usb_gadget_set_selfpowered(gadget); - if (gadget->is_otg) { + if (gadget_is_otg(gadget)) { otg_descriptor.bmAttributes |= USB_OTG_HNP; printer_cfg_driver.descriptors = otg_desc; printer_cfg_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP; |