diff options
| author | Xinwei Kong <kong.kongxinwei@hisilicon.com> | 2020-01-03 10:52:10 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-06-07 13:18:49 +0200 |
| commit | 6106585fc4c417283255f0d58b5f4735592383fd (patch) | |
| tree | 784dd06aa962dbcb90ebcdde4d2eb86277cb3ea6 /sound/soc/intel | |
| parent | 99c63ba21d2ea9d28880b0341b25e4a4ce8a18bb (diff) | |
spi: dw: use "smp_mb()" to avoid sending spi data error
[ Upstream commit bfda044533b213985bc62bd7ca96f2b984d21b80 ]
Because of out-of-order execution about some CPU architecture,
In this debug stage we find Completing spi interrupt enable ->
prodrucing TXEI interrupt -> running "interrupt_transfer" function
will prior to set "dw->rx and dws->rx_end" data, so this patch add
memory barrier to enable dw->rx and dw->rx_end to be visible and
solve to send SPI data error.
eg:
it will fix to this following low possibility error in testing environment
which using SPI control to connect TPM Modules
kernel: tpm tpm0: Operation Timed out
kernel: tpm tpm0: tpm_relinquish_locality: : error -1
Signed-off-by: fengsheng <fengsheng5@huawei.com>
Signed-off-by: Xinwei Kong <kong.kongxinwei@hisilicon.com>
Link: https://lore.kernel.org/r/1578019930-55858-1-git-send-email-kong.kongxinwei@hisilicon.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'sound/soc/intel')
0 files changed, 0 insertions, 0 deletions