drivers: mbox_nxp_imx_mu: return negative errno value on error
Change nxp_imx_mu_send() to return a negative errno value on error. The fsl_mu function MU_TriggerInterrupts() returns either kStatus_Success or kStatus_Fail, which have the value 0 or 1, respectively. kStatus_Fail should not be returned to the upper levels, which expect negative values for errors, so add a check for the return value of MU_TriggerInterrupts() and return an errno value on error. Signed-off-by: Mike J. Chen <mjchen@google.com>
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1 changed files with 6 additions and 1 deletions
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@ -61,7 +61,12 @@ static int nxp_imx_mu_send(const struct device *dev, uint32_t channel, const str
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/* Signalling mode. */
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if (msg == NULL) {
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return MU_TriggerInterrupts(cfg->base, g_gen_int_trig_mask[channel]);
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if (MU_TriggerInterrupts(cfg->base, g_gen_int_trig_mask[channel]) !=
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kStatus_Success) {
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/* interrupt already pending, cannot trigger again */
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return -EAGAIN;
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}
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return 0;
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}
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/* Data transfer mode. */
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