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authorJohan Hovold <johan@kernel.org>2020-01-16 17:07:05 +0100
committerJohan Hovold <johan@kernel.org>2020-01-17 11:11:26 +0100
commitfdb838efa31e1ed9a13ae6ad0b64e30fdbd00570 (patch)
treebee2c0a59c13b0541ca708db04de284c3fc64139 /drivers/usb/serial
parentf3eaabbfd093c93d791eb930cc68d9b15246a65e (diff)
USB: serial: suppress driver bind attributes
USB-serial drivers must not be unbound from their ports before the corresponding USB driver is unbound from the parent interface so suppress the bind and unbind attributes. Unbinding a serial driver while it's port is open is a sure way to trigger a crash as any driver state is released on unbind while port hangup is handled on the parent USB interface level. Drivers for multiport devices where ports share a resource such as an interrupt endpoint also generally cannot handle individual ports going away. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: stable <stable@vger.kernel.org> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Johan Hovold <johan@kernel.org>
Diffstat (limited to 'drivers/usb/serial')
-rw-r--r--drivers/usb/serial/usb-serial.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 8f066bb55d7d..dc7a65b9ec98 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -1317,6 +1317,9 @@ static int usb_serial_register(struct usb_serial_driver *driver)
return -EINVAL;
}
+ /* Prevent individual ports from being unbound. */
+ driver->driver.suppress_bind_attrs = true;
+
usb_serial_operations_init(driver);
/* Add this device to our list of devices */