do not wait forever on ejtag_dma_dstrt_poll

Change-Id: I26adab09839795ecf363b7db912392bd5314cec5
Signed-off-by: Oleksij Rempel <bug-track@fisher-privat.net>
Reviewed-on: http://openocd.zylin.com/1344
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>

diff --git a/src/target/mips32_dmaacc.c b/src/target/mips32_dmaacc.c
index 733f96cf42395fcfc595fa4ae594b4dc3f734065..eb6cd8ce112791a7d4f68dfbf020713464ec8da6 100644 (file)
--- a/src/target/mips32_dmaacc.c
+++ b/src/target/mips32_dmaacc.c
@@ -28,6 +28,7 @@
 #endif
 
 #include "mips32_dmaacc.h"
+#include <helper/time_support.h>
 
 static int mips32_dmaacc_read_mem8(struct mips_ejtag *ejtag_info,
                uint32_t addr, int count, uint8_t *buf);
@@ -53,13 +54,20 @@ static int mips32_dmaacc_write_mem32(struct mips_ejtag *ejtag_info,
  * displaying/modifying memory and memory mapped registers.
  */
 
-static void ejtag_dma_dstrt_poll(struct mips_ejtag *ejtag_info)
+static int ejtag_dma_dstrt_poll(struct mips_ejtag *ejtag_info)
 {
        uint32_t ejtag_ctrl;
+       int64_t start = timeval_ms();
+
        do {
+               if (timeval_ms() - start > 1000) {
+                       LOG_ERROR("DMA time out");
+                       return -ETIMEDOUT;
+               }
                ejtag_ctrl = EJTAG_CTRL_DMAACC | ejtag_info->ejtag_ctrl;
                mips_ejtag_drscan_32(ejtag_info, &ejtag_ctrl);
        } while (ejtag_ctrl & EJTAG_CTRL_DSTRT);
+       return 0;
 }
 
 static int ejtag_dma_read(struct mips_ejtag *ejtag_info, uint32_t addr, uint32_t *data)