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Merge branch 'bugfix/spi_slave_fix_cs_num_crash' into 'master'

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spi_slave: fix crash issue when cs is set to -1

Closes IDFGH-3885

See merge request espressif/esp-idf!10414
This commit is contained in:
Michael (XIAO Xufeng) 2020-10-22 22:36:21 +08:00
commit b744c14a8a
1 changed files with 5 additions and 1 deletions
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6
components/driver/spi_slave.c
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@ -125,6 +125,7 @@ esp_err_t spi_slave_initialize(spi_host_device_t host, const spi_bus_config_t *b
#ifndef CONFIG_SPI_SLAVE_ISR_IN_IRAM
SPI_CHECK((bus_config->intr_flags & ESP_INTR_FLAG_IRAM)==0, "ESP_INTR_FLAG_IRAM should be disabled when CONFIG_SPI_SLAVE_ISR_IN_IRAM is not set.", ESP_ERR_INVALID_ARG);
#endif
SPI_CHECK(slave_config->spics_io_num < 0 || GPIO_IS_VALID_GPIO(slave_config->spics_io_num), "spics pin invalid", ESP_ERR_INVALID_ARG);
spi_chan_claimed=spicommon_periph_claim(host, "spi slave");
SPI_CHECK(spi_chan_claimed, "host already in use", ESP_ERR_INVALID_STATE);
@ -152,7 +153,10 @@ esp_err_t spi_slave_initialize(spi_host_device_t host, const spi_bus_config_t *b
ret = err;
goto cleanup;
}
spicommon_cs_initialize(host, slave_config->spics_io_num, 0, !bus_is_iomux(spihost[host]));
if (slave_config->spics_io_num >= 0) {
spicommon_cs_initialize(host, slave_config->spics_io_num, 0, !bus_is_iomux(spihost[host]));
}
// The slave DMA suffers from unexpected transactions. Forbid reading if DMA is enabled by disabling the CS line.
if (use_dma) freeze_cs(spihost[host]);