Fix possible race condition in uart attach (espressif#4569)

lbernstone · web-flow · commit c1b06cc1205a · 2020-12-01T16:36:44.000+02:00
diff --git a/cores/esp32/esp32-hal-uart.c b/cores/esp32/esp32-hal-uart.c
@@ -185,8 +185,8 @@ void uartAttachRx(uart_t* uart, uint8_t rxPin, bool inverted)
         return;
     }
     pinMode(rxPin, INPUT);
-    pinMatrixInAttach(rxPin, UART_RXD_IDX(uart->num), inverted);
     uartEnableInterrupt(uart);
+    pinMatrixInAttach(rxPin, UART_RXD_IDX(uart->num), inverted);
 }
 
 void uartAttachTx(uart_t* uart, uint8_t txPin, bool inverted)

Original file line number	Diff line number	Diff line change
`@@ -185,8 +185,8 @@ void uartAttachRx(uart_t* uart, uint8_t rxPin, bool inverted)`
`185`	`185`	`return;`
`186`	`186`	`}`
`187`	`187`	`pinMode(rxPin, INPUT);`
`188`		`- pinMatrixInAttach(rxPin, UART_RXD_IDX(uart->num), inverted);`
`189`	`188`	`uartEnableInterrupt(uart);`
	`189`	`+ pinMatrixInAttach(rxPin, UART_RXD_IDX(uart->num), inverted);`
`190`	`190`	`}`
`191`	`191`
`192`	`192`	`void uartAttachTx(uart_t* uart, uint8_t txPin, bool inverted)`