acm: Fix oops when closing ACM tty device right after open has failed.
commit922b13565b6a826a925f9f91f053dc9cb0d6210e
authorThadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
Thu, 25 Jun 2009 13:41:30 +0000 (25 14:41 +0100)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 25 Jun 2009 18:24:26 +0000 (25 11:24 -0700)
tree4c5680f084b62afd5d0f2e6247fd500277610c65
parent42dd2aa6496a2e87e496aac5494d2e1d6096c85b
acm: Fix oops when closing ACM tty device right after open has failed.

This commit 10077d4a6674f535abdbe25cdecb1202af7948f1 has stopped
checking if there was a valid acm device associated to the tty, which is
not true right after open fails and tty subsystem tries to close the
device.

As an example, open fails with a non-existing device, when probe has
never been called, because the device has never been plugged. This is
common in systems with static modules and no udev.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/usb/class/cdc-acm.c