MYD-AM335X_J使用3g拨号模块（龙尚u6300v）的报内核信息出错

————[ cut here ]————
WARNING: at drivers/tty/tty_io.c:1358 tty_open+0x4a0/0x4e8()
Modules linked in: ti_tsc
Backtrace:
[<c0017dbc>] (dump_backtrace+0x0/0x10c) from [<c047b5dc>] (dump_stack+0x18/0x1c)
r6:c0225398 r5:00000009 r4:00000000 r3:c067180c
[<c047b5c4>] (dump_stack+0x0/0x1c) from [<c003cec8>] (warn_slowpath_common+0x54/0x6c)
[<c003ce74>] (warn_slowpath_common+0x0/0x6c) from [<c003cf04>] (warn_slowpath_null+0x24/0x2c)
r8:cf5b3c18 r7:00000000 r6:c068d5fc r5:cf4ebbc0 r4:0bc00002
r3:00000009
[<c003cee0>] (warn_slowpath_null+0x0/0x2c) from [<c0225398>] (tty_open+0x4a0/0x4e8)
[<c0224ef8>] (tty_open+0x0/0x4e8) from [<c00a7be4>] (chrdev_open+0x98/0x16c)
[<c00a7b4c>] (chrdev_open+0x0/0x16c) from [<c00a29a0>] (__dentry_open+0x214/0x2cc)
r7:cf010e00 r6:ce81ac18 r5:00000000 r4:00000000
[<c00a278c>] (__dentry_open+0x0/0x2cc) from [<c00a38e0>] (nameidata_to_filp+0x68/0x70)
[<c00a3878>] (nameidata_to_filp+0x0/0x70) from [<c00b0c78>] (do_last.isra.28+0x2b8/0x6bc)
r7:cf31bd00 r6:00020802 r5:00000000 r4:cf5e5ed8
[<c00b09c0>] (do_last.isra.28+0x0/0x6bc) from [<c00b1178>] (path_openat+0xc0/0x3a0)
[<c00b10b8>] (path_openat+0x0/0x3a0) from [<c00b1564>] (do_filp_open+0x34/0x88)
[<c00b1530>] (do_filp_open+0x0/0x88) from [<c00a39cc>] (do_sys_open+0xe4/0x17c)
r7:00000007 r6:ffffff9c r5:cf595000 r4:00020802
[<c00a38e8>] (do_sys_open+0x0/0x17c) from [<c00a3a88>] (sys_open+0x24/0x28)
[<c00a3a64>] (sys_open+0x0/0x28) from [<c0014740>] (ret_fast_syscall+0x0/0x30)
—[ end trace 470f79d4feb57da0 ]—

Denny%20Yang99373：

看提示好像是

WARNING: at drivers/tty/tty_io.c:1358 tty_open+0x4a0/0x4e8()

在tty_open里面出错了，可以加些打印DEBUG一下

susu su：

回复 Denny%20Yang99373:

请认真回答哦，这款内核怎么对3g，4g拨号不怎么支持

susu su：

回复 Denny%20Yang99373:

请认真回答哦，这款内核对3g，4g拨号模块不怎么支持耶

Yaoming Qin：

回复 susu su:

对于这样的4g模块，您首先要跟模块厂商咨询驱动以及对应的kernel版本，然后看看测试程序。