From 77f874049dcc4e691e97e24c0e45405ab1982430 Mon Sep 17 00:00:00 2001 From: wuzhenghui Date: Mon, 13 Oct 2025 15:49:23 +0800 Subject: [PATCH] fix(esp_driver_usb_serial_jtag): check USJ accessibility before read/write Add connection checks to usb_serial_jtag_write and usb_serial_jtag_read functions to return -EIO error code when the USB Serial JTAG is not connected. --- components/vfs/vfs_usb_serial_jtag.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/components/vfs/vfs_usb_serial_jtag.c b/components/vfs/vfs_usb_serial_jtag.c index a1ae97437a..36e97056fb 100644 --- a/components/vfs/vfs_usb_serial_jtag.c +++ b/components/vfs/vfs_usb_serial_jtag.c @@ -144,6 +144,10 @@ static int usb_serial_jtag_rx_char(int fd) static ssize_t usb_serial_jtag_write(int fd, const void * data, size_t size) { + if (!usb_serial_jtag_is_connected()) { + // TODO: IDF-14303 + return -1; + } const char *data_c = (const char *)data; /* Even though newlib does stream locking on each individual stream, we need * a dedicated lock if two streams (stdout and stderr) point to the @@ -189,6 +193,10 @@ static void usb_serial_jtag_return_char(int fd, int c) static ssize_t usb_serial_jtag_read(int fd, void* data, size_t size) { + if (!usb_serial_jtag_is_connected()) { + // TODO: IDF-14303 + return -1; + } char *data_c = (char *) data; size_t received = 0; _lock_acquire_recursive(&s_ctx.read_lock); @@ -264,6 +272,10 @@ static int usb_serial_jtag_fcntl(int fd, int cmd, int arg) static int usb_serial_jtag_fsync(int fd) { + if (!usb_serial_jtag_is_connected()) { + // TODO: IDF-14303 + return -1; + } _lock_acquire_recursive(&s_ctx.write_lock); usb_serial_jtag_ll_txfifo_flush(); //Wait for the host to have picked up the buffer, but honour the timeout in