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Code Issues Releases Wiki Activity

soundwire: cadence: revisit parity injection

Browse source 
We want to wait for the CONFIG_UPDATE bit to clear before doing
something else.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20230518024119.164160-4-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Pierre-Louis Bossart 2023-05-18 10:41:19 +08:00 committed by Vinod Koul
parent ffc363d970
commit 94f8995085
1 changed files with 10 additions and 9 deletions
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19
drivers/soundwire/cadence_master.c
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@ -456,9 +456,9 @@ static int cdns_parity_error_injection(void *data, u64 value)
CDNS_IP_MCP_CMDCTRL_INSERT_PARITY_ERR);
/* commit changes */
cdns_updatel(cdns, CDNS_MCP_CONFIG_UPDATE,
CDNS_MCP_CONFIG_UPDATE_BIT,
CDNS_MCP_CONFIG_UPDATE_BIT);
ret = cdns_clear_bit(cdns, CDNS_MCP_CONFIG_UPDATE, CDNS_MCP_CONFIG_UPDATE_BIT);
if (ret < 0)
goto unlock;
/* do a broadcast dummy read to avoid bus clashes */
ret = sdw_bread_no_pm_unlocked(&cdns->bus, 0xf, SDW_SCP_DEVID_0);
@ -470,16 +470,17 @@ static int cdns_parity_error_injection(void *data, u64 value)
0);
/* commit changes */
cdns_updatel(cdns, CDNS_MCP_CONFIG_UPDATE,
CDNS_MCP_CONFIG_UPDATE_BIT,
CDNS_MCP_CONFIG_UPDATE_BIT);
/* Continue bus operation with parity error injection disabled */
mutex_unlock(&bus->bus_lock);
ret = cdns_clear_bit(cdns, CDNS_MCP_CONFIG_UPDATE, CDNS_MCP_CONFIG_UPDATE_BIT);
if (ret < 0)
goto unlock;
/* Userspace changed the hardware state behind the kernel's back */
add_taint(TAINT_USER, LOCKDEP_STILL_OK);
unlock:
/* Continue bus operation with parity error injection disabled */
mutex_unlock(&bus->bus_lock);
/*
* allow Master device to enter pm_runtime suspend. This may
* also result in Slave devices suspending.