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i2c: fix buffer check when SPIRAM used as a heap

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* Closes https://github.com/espressif/esp-idf/issues/8173
This commit is contained in:
Omar Chebib 2021-12-31 14:36:16 +08:00
parent 14b52e9d83
commit 98647cf351
1 changed files with 15 additions and 14 deletions
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29
components/driver/i2c.c
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@ -1375,16 +1375,18 @@ static void IRAM_ATTR i2c_master_cmd_begin_static(i2c_port_t i2c_num)
//Check whether read or write buffer in cmd_link is internal.
static bool is_cmd_link_buffer_internal(const i2c_cmd_link_t *link)
{
const i2c_cmd_link_t *cmd_link = link;
while (cmd_link != NULL) {
if (cmd_link->cmd.hw_cmd.op_code == I2C_LL_CMD_WRITE || cmd_link->cmd.hw_cmd.op_code == I2C_LL_CMD_READ) {
if (cmd_link->cmd.data != NULL && !esp_ptr_internal(cmd_link->cmd.data)) {
return false;
}
}
cmd_link = cmd_link->next;
bool is_internal = true;
for (const i2c_cmd_link_t *cmd_link = link;
cmd_link != NULL && is_internal;
cmd_link = cmd_link->next)
{
/* A command node has a valid pointer if it is a read command or a write command with more than one byte. */
const bool data_pointer = (cmd_link->cmd.hw_cmd.op_code == I2C_LL_CMD_WRITE && !i2c_cmd_is_single_byte(&cmd_link->cmd))
|| cmd_link->cmd.hw_cmd.op_code == I2C_LL_CMD_READ;
/* Check if the (non-NULL) pointer points to internal memory. */
is_internal &= !data_pointer || cmd_link->cmd.data == NULL || esp_ptr_internal(cmd_link->cmd.data);
}
return true;
return is_internal;
}
#endif
@ -1398,11 +1400,10 @@ esp_err_t i2c_master_cmd_begin(i2c_port_t i2c_num, i2c_cmd_handle_t cmd_handle,
#if CONFIG_SPIRAM_USE_MALLOC
//If the i2c read or write buffer is not in internal RAM, we will return ESP_FAIL
//to avoid the ISR handler function crashing when the cache is disabled.
if ((p_i2c_obj[i2c_num]->intr_alloc_flags & ESP_INTR_FLAG_IRAM)) {
if (!is_cmd_link_buffer_internal(((const i2c_cmd_desc_t *)cmd_handle)->head) ) {
ESP_LOGE(I2C_TAG, I2C_PSRAM_BUFFER_WARN_STR);
return ESP_ERR_INVALID_ARG;
}
if ( (p_i2c_obj[i2c_num]->intr_alloc_flags & ESP_INTR_FLAG_IRAM) &&
!is_cmd_link_buffer_internal(((const i2c_cmd_desc_t *)cmd_handle)->head) ) {
ESP_LOGE(I2C_TAG, I2C_PSRAM_BUFFER_WARN_STR);
return ESP_ERR_INVALID_ARG;
}
#endif
// Sometimes when the FSM get stuck, the ACK_ERR interrupt will occur endlessly until we reset the FSM and clear bus.