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f9437fa5d2
commit a1b94355ea upstream.
acpi_match_device can potentially return NULL, so it is prudent to
check if acpi_id is null before it is dereferenced. Add a check
and an error message to indicate the failure.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Cc: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>