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| /openbmc/linux/drivers/usb/serial/ |
| H A D | mos7840.c | diff 960fbd1ca584a5b4cd818255769769d42bfc6dbe Thu Nov 07 07:28:56 CST 2019 Johan Hovold <johan@kernel.org> USB: serial: mos7840: fix probe error handling
The driver would return success and leave the port structures
half-initialised if any of the register accesses during probe fails.
This would specifically leave the port control urb unallocated,
something which could trigger a NULL pointer dereference on interrupt
events.
Fortunately the interrupt implementation is completely broken and has
never even been enabled...
Note that the zero-length-enable register write used to set the zle-flag
for all ports is moved to attach.
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
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