我正在使用Sierra Aircard调制解调器
在配置拨号端口/ PPP端口时，我正在打开此端口（deb / ttyUSB3）
struct termios tio;
memset(&tio, 0, sizeof(termios));
if ((fdDataPort = open(portName, O_RDWR | O_NOCTTY| O_SYNC | O_NONBLOCK )) != -1)
{
cfmakeraw (&tio);
printf("After OpenDataPort call");
tio.c_iflag = 0;//IGNCR;
tio.c_cflag |= CLOCAL | CREAD;
tcflush(fdDataPort, TCIOFLUSH);
tcsetattr(fdDataPort, TCSANOW, &tio);
tcflush(fdDataPort, TCIOFLUSH);
tcflush(fdDataPort, TCIOFLUSH);
cfsetispeed(&tio, B115200);
cfsetospeed(&tio, B115200);
tcsetattr(fdDataPort, TCSANOW, &tio);
printf("After tcsetattr call");
return true;
}
else
{
return false;
}
此配置在连接建立之前一直运行良好。重新连接等
但是这个方法有一个问题：如果我在此操作正在进行时删除加密狗（仅几毫秒）我无法在物理设备管理器中检测到加密狗删除（此过程会执行设备管理模式切换etc ...）因为没有从内核层接收到msg。如果我删除加密狗也/ dev / ttyUSB3仍然存在（0,1,2被释放）。如果这是打开端口的正确方法或任何其他方法，请告知我们。感谢您的帮助
修改
Below is the ERROR log from dmesg
49.463282] 5864 slab pages
[ 49.463286] 943924 pages shared
[ 49.463291] 0 pages swap cached
[ 49.465229] FAT-fs (sda1): utf8 is not a recommended IO charset for FAT filesystems, filesystem will be case sensitive!
[ 49.511839] FAT-fs (sda1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
[ 51.120554] usb 1-1: USB disconnect, device number 4
[ 51.153175] sierra ttyUSB0: Sierra USB modem converter now disconnected from ttyUSB0
[ 51.153546] sierra 1-1:1.0: device disconnected
[ 51.185779] sierra ttyUSB1: Sierra USB modem converter now disconnected from ttyUSB1
[ 51.186091] sierra 1-1:1.1: device disconnected
[ 51.233531] sierra ttyUSB2: Sierra USB modem converter now disconnected from ttyUSB2
[ 51.233888] sierra 1-1:1.3: device disconnected
[ 51.242018] sierra ttyUSB3: sierra_submit_rx_urbs: submit urb failed: -19
[ 51.242032] sierra ttyUSB3: sierra_submit_rx_urbs: submit urb failed: -19
[ 51.242040] sierra ttyUSB3: sierra_submit_rx_urbs: submit urb failed: -19
[ 51.242047] sierra ttyUSB3: sierra_submit_rx_urbs: submit urb failed: -19
[ 51.242054] sierra ttyUSB3: sierra_submit_rx_urbs: submit urb failed: -19
[ 51.242060] sierra ttyUSB3: sierra_submit_rx_urbs: submit urb failed: -19
[ 51.242066] sierra ttyUSB3: sierra_submit_rx_urbs: submit urb failed: -19
[ 51.242073] sierra ttyUSB3: sierra_submit_rx_urbs: submit urb failed: -19
[ 51.617553] sd 1:0:0:0: [sda] Unhandled error code
[ 51.617569] sd 1:0:0:0: [sda]
[ 51.617575] Result: hostbyte=0x07 driverbyte=0x00
[ 51.617582] sd 1:0:0:0: [sda] CDB:
[ 51.617587] cdb[0]=0x28: 28 00 00 00 0d 27 00 00 01 00
[ 51.617619] end_request: I/O error, dev sda, sector 3367
[ 51.617674] sd 1:0:0:0: [sda] Unhandled error code
[ 51.617682] sd 1:0:0:0: [sda]
[ 51.617687] Result: hostbyte=0x07 driverbyte=0x00
[ 51.617693] sd 1:0:0:0: [sda] CDB:
[ 51.617698] cdb[0]=0x28: 28 00 00 00 0d 28 00 00 01 00
我被困了请求帮助