stlink: skip rw-misc commands with TCP server

[openocd.git] / src / jtag / drivers / stlink_usb.c

diff --git a/src/jtag/drivers/stlink_usb.c b/src/jtag/drivers/stlink_usb.c
index 42b8cc2e8a5794d97f40c2685183d9908f09a8d0..b51a0c2bacd23d51232657e510ed3c0848c54d48 100644 (file)
--- a/src/jtag/drivers/stlink_usb.c
+++ b/src/jtag/drivers/stlink_usb.c
@@ -4445,6 +4445,13 @@ static int stlink_usb_count_misc_rw_queue(void *handle, const struct dap_queue *
 
        if (!(h->version.flags & STLINK_F_HAS_RW_MISC))
                return 0;
+       /*
+        * RW_MISC sequence doesn't lock the st-link, so are not safe in shared mode.
+        * Don't use it with TCP backend to prevent any issue in case of sharing.
+        * This further degrades the performance, on top of TCP server overhead.
+        */
+       if (h->backend == &stlink_tcp_backend)
+               return 0;
 
        for (i = 0; i < len; i++) {
                if (q[i].cmd != CMD_MEM_AP_READ32 && q[i].cmd != CMD_MEM_AP_WRITE32)