5.4-stable review patch. If anyone has any objections, please let me know.
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From: Sneh Mankad sneh.mankad@oss.qualcomm.com
[ Upstream commit f87412d18edb5b8393eb8cb1c2d4a54f90185a21 ]
Unconditionally clear the TCS_AMC_MODE_TRIGGER bit when a transaction completes. Previously this bit was only cleared when a wake TCS was borrowed as an AMC TCS but not for dedicated AMC TCS. Leaving this bit set for AMC TCS and entering deeper low power modes can generate a false completion IRQ.
Prevent this scenario by always clearing the TCS_AMC_MODE_TRIGGER bit upon receiving a completion IRQ.
Fixes: 15b3bf61b8d4 ("soc: qcom: rpmh-rsc: Clear active mode configuration for wake TCS") Signed-off-by: Sneh Mankad sneh.mankad@oss.qualcomm.com Link: https://lore.kernel.org/r/20250825-rpmh_rsc_change-v1-1-138202c31bf6@oss.qua... Signed-off-by: Bjorn Andersson andersson@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/soc/qcom/rpmh-rsc.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/drivers/soc/qcom/rpmh-rsc.c b/drivers/soc/qcom/rpmh-rsc.c index 8924fcd9f5f59..a89d78afc8970 100644 --- a/drivers/soc/qcom/rpmh-rsc.c +++ b/drivers/soc/qcom/rpmh-rsc.c @@ -265,13 +265,10 @@ static irqreturn_t tcs_tx_done(int irq, void *p)
trace_rpmh_tx_done(drv, i, req, err);
- /* - * If wake tcs was re-purposed for sending active - * votes, clear AMC trigger & enable modes and + /* Clear AMC trigger & enable modes and * disable interrupt for this TCS */ - if (!drv->tcs[ACTIVE_TCS].num_tcs) - __tcs_set_trigger(drv, i, false); + __tcs_set_trigger(drv, i, false); skip: /* Reclaim the TCS */ write_tcs_reg(drv, RSC_DRV_CMD_ENABLE, i, 0);