soundwire: intel: Initialize clock stop timeout
authorSjoerd Simons <sjoerd@collabora.com>
Thu, 20 Oct 2022 01:56:24 +0000 (09:56 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 14 Dec 2022 10:37:19 +0000 (11:37 +0100)
commit28abc1145924dead381dcd30e5be6d3eb41ec042
treec92e3a340ae44aebe2decb11c286c470c3360574
parent22d800b378e45ca1415b6e5e00665131be3721a2
soundwire: intel: Initialize clock stop timeout

commit 13c30a755847c7e804e1bf755e66e3ff7b7f9367 upstream.

The bus->clk_stop_timeout member is only initialized to a non-zero value
during the codec driver probe. This can lead to corner cases where this
value remains pegged at zero when the bus suspends, which results in an
endless loop in sdw_bus_wait_for_clk_prep_deprep().

Corner cases include configurations with no codecs described in the
firmware, or delays in probing codec drivers.

Initializing the default timeout to the smallest non-zero value avoid this
problem and allows for the existing logic to be preserved: the
bus->clk_stop_timeout is set as the maximum required by all codecs
connected on the bus.

Fixes: 1f2dcf3a154ac ("soundwire: intel: set dev_num_ida_min")
Signed-off-by: Sjoerd Simons <sjoerd@collabora.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Chao Song <chao.song@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20221020015624.1703950-1-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/soundwire/intel.c