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drivers: ipm: fix infinite TXF interrupt

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The TXF interrupt mask is not properly set. In this case the
interrupt line is not cleaned, leading to the re-entrance
in the interrupt handler.

the issue is linked to the management of the IPCC_CxTOCySR value.
The TXF interrupt is triggered when the IPCC_CyMR is channel bit is
set to 0 and the IPCC_CxTOCySR associated bit move from 1 to 0.

The fix is to check if the IPCC_CxTOCySR channel bit is 0 instead of 1.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
This commit is contained in:
Arnaud Pouliquen
2022-10-10 10:22:22 +02:00
committed by Carles Cufí
parent 36ea41fad3
commit fb43a48065
1 changed files with 1 additions and 1 deletions
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2
drivers/ipm/ipm_stm32_ipcc.c
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@@ -136,7 +136,7 @@ static void stm32_ipcc_mailbox_tx_isr(const struct device *dev)
mask = (~IPCC_ReadReg(cfg->ipcc, MR)) & IPCC_ALL_MR_TXF_CH_MASK;
mask = mask >> IPCC_C1MR_CH1FM_Pos;
mask &= IPCC_ReadReg_SR(cfg->ipcc) & IPCC_ALL_SR_CH_MASK;
mask &= ~IPCC_ReadReg_SR(cfg->ipcc) & IPCC_ALL_SR_CH_MASK;
for (i = 0; i < data->num_ch; i++) {
if (!((1 << i) & mask)) {