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| H A D | serial_base_bus.c | diff cef09673c35bdffb0866268cedae5994e024ddb8 Wed Jun 14 08:36:33 CEST 2023 Dan Carpenter <dan.carpenter@linaro.org> serial: core: fix -EPROBE_DEFER handling in init
The -EPROBE_DEFER error path in serial_base_device_init() is a bit
awkward. Before the call to device_initialize(dev) then we need to
manually release all the device resources. And after the call then we
need to call put_device() to release the resources. Doing either one
wrong will result in a leak or a use after free.
So let's wait to return -EPROBE_DEFER until after the call to
device_initialize(dev) so that way callers do not have to handle
-EPROBE_DEFER as a special case. Now callers can just use put_device()
for clean up.
The second issue with the -EPROBE_DEFER path is that deferring is not
supposed to be a fatal error, but instead it's normal part of the
init process and the kernel recovers from it automatically. That means
we should not print an error message but just a debug message on this
path.
Fixes: 539914240a01 ("serial: core: Fix probing serial_base_bus devices")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Tony Lindgren <tony@atomide.com>
Message-ID: <18318adb-ab2c-4dcc-9f96-498a13d16b80@moroto.mountain>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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