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Merge branch 'fix/workaround_rmt_static_analyzer_issue' into 'master'

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fix(rmt): fix gcc static analyzer warnings

Closes IDF-10235

See merge request espressif/esp-idf!31725
This commit is contained in:
morris 2024-06-28 15:40:56 +08:00
commit 136a07d457
2 changed files with 23 additions and 22 deletions
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2
components/esp_driver_rmt/src/rmt_private.h
View File

@ -65,7 +65,7 @@ extern "C" {
typedef dma_descriptor_align4_t rmt_dma_descriptor_t;
#ifdef CACHE_LL_L2MEM_NON_CACHE_ADDR
#define RMT_GET_NON_CACHE_ADDR(addr) ((addr) ? CACHE_LL_L2MEM_NON_CACHE_ADDR(addr) : 0)
#define RMT_GET_NON_CACHE_ADDR(addr) (CACHE_LL_L2MEM_NON_CACHE_ADDR(addr))
#else
#define RMT_GET_NON_CACHE_ADDR(addr) (addr)
#endif

43
components/esp_driver_rmt/src/rmt_tx.c
View File

@ -1106,32 +1106,33 @@ static void IRAM_ATTR rmt_tx_default_isr(void *args)
}
#if SOC_RMT_SUPPORT_DMA
ESP_COMPILER_DIAGNOSTIC_PUSH_IGNORE("-Wanalyzer-null-dereference") // TODO IDF-10235
static bool IRAM_ATTR rmt_dma_tx_eof_cb(gdma_channel_handle_t dma_chan, gdma_event_data_t *event_data, void *user_data)
{
rmt_tx_channel_t *tx_chan = (rmt_tx_channel_t *)user_data;
// tx_eof_desc_addr must be non-zero, guaranteed by the hardware
rmt_dma_descriptor_t *eof_desc_nc = (rmt_dma_descriptor_t *)RMT_GET_NON_CACHE_ADDR(event_data->tx_eof_desc_addr);
rmt_dma_descriptor_t *n = (rmt_dma_descriptor_t *)RMT_GET_NON_CACHE_ADDR(eof_desc_nc->next); // next points to a cache address, needs to convert it to a non-cached one
if (n) {
rmt_dma_descriptor_t *nn = (rmt_dma_descriptor_t *)RMT_GET_NON_CACHE_ADDR(n->next);
// if the DMA descriptor link is still a ring (i.e. hasn't broken down by `rmt_tx_mark_eof()`), then we treat it as a valid ping-pong event
if (nn) {
// continue ping-pong transmission
rmt_tx_trans_desc_t *t = tx_chan->cur_trans;
size_t encoded_symbols = t->transmitted_symbol_num;
if (t->flags.encoding_done) {
rmt_tx_mark_eof(tx_chan);
encoded_symbols += 1;
} else {
encoded_symbols += rmt_encode_check_result(tx_chan, t);
}
t->transmitted_symbol_num = encoded_symbols;
tx_chan->mem_end = tx_chan->ping_pong_symbols * 3 - tx_chan->mem_end; // mem_end equals to either ping_pong_symbols or ping_pong_symbols*2
// tell DMA that we have a new descriptor attached
gdma_append(dma_chan);
}
if (!eof_desc_nc->next) {
return false;
}
// next points to a cache address, convert it to a non-cached one
rmt_dma_descriptor_t *n = (rmt_dma_descriptor_t *)RMT_GET_NON_CACHE_ADDR(eof_desc_nc->next);
if (!n->next) {
return false;
}
// if the DMA descriptor link is still a ring (i.e. hasn't broken down by `rmt_tx_mark_eof()`), then we treat it as a valid ping-pong event
// continue ping-pong transmission
rmt_tx_trans_desc_t *t = tx_chan->cur_trans;
size_t encoded_symbols = t->transmitted_symbol_num;
if (t->flags.encoding_done) {
rmt_tx_mark_eof(tx_chan);
encoded_symbols += 1;
} else {
encoded_symbols += rmt_encode_check_result(tx_chan, t);
}
t->transmitted_symbol_num = encoded_symbols;
tx_chan->mem_end = tx_chan->ping_pong_symbols * 3 - tx_chan->mem_end; // mem_end equals to either ping_pong_symbols or ping_pong_symbols*2
// tell DMA that we have a new descriptor attached
gdma_append(dma_chan);
return false;
}
ESP_COMPILER_DIAGNOSTIC_POP("-Wanalyzer-null-dereference")
#endif // SOC_RMT_SUPPORT_DMA