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ftdi: don't wait forever if we fail

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Currently if ftdi device is removed, OpenOCD will stall forever.
Only kill -9 will help in this case.
This patch makes use of libusb timeout functions and
trying to break out of while loop if some error is detected.

[andreas.fritiofson@gmail.com]: Add missing retval check

Change-Id: I97506190e376026705f14ef9fe37dc811b99b3ac
Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/3419
Reviewed-by: Andreas Färber <afaerber@suse.de>
Tested-by: jenkins
This commit is contained in:
Andreas Fritiofson 2016-08-14 15:15:27 +02:00 committed by Spencer Oliver
parent 5fd5699859
commit db6c6f5da4
1 changed files with 20 additions and 4 deletions
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24
src/jtag/drivers/mpsse.c
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@ -872,6 +872,8 @@ int mpsse_flush(struct mpsse_ctx *ctx)
libusb_fill_bulk_transfer(write_transfer, ctx->usb_dev, ctx->out_ep, ctx->write_buffer,
ctx->write_count, write_cb, &write_result, ctx->usb_write_timeout);
retval = libusb_submit_transfer(write_transfer);
if (retval != LIBUSB_SUCCESS)
goto error_check;
if (ctx->read_count) {
read_transfer = libusb_alloc_transfer(0);
@ -879,22 +881,36 @@ int mpsse_flush(struct mpsse_ctx *ctx)
ctx->read_chunk_size, read_cb, &read_result,
ctx->usb_read_timeout);
retval = libusb_submit_transfer(read_transfer);
if (retval != LIBUSB_SUCCESS)
goto error_check;
}
/* Polling loop, more or less taken from libftdi */
while (!write_result.done || !read_result.done) {
retval = libusb_handle_events(ctx->usb_ctx);
struct timeval timeout_usb;
timeout_usb.tv_sec = 1;
timeout_usb.tv_usec = 0;
retval = libusb_handle_events_timeout_completed(ctx->usb_ctx, &timeout_usb, NULL);
keep_alive();
if (retval != LIBUSB_SUCCESS && retval != LIBUSB_ERROR_INTERRUPTED) {
if (retval == LIBUSB_ERROR_NO_DEVICE || retval == LIBUSB_ERROR_INTERRUPTED)
break;
if (retval != LIBUSB_SUCCESS) {
libusb_cancel_transfer(write_transfer);
if (read_transfer)
libusb_cancel_transfer(read_transfer);
while (!write_result.done || !read_result.done)
if (libusb_handle_events(ctx->usb_ctx) != LIBUSB_SUCCESS)
while (!write_result.done || !read_result.done) {
retval = libusb_handle_events_timeout_completed(ctx->usb_ctx,
&timeout_usb, NULL);
if (retval != LIBUSB_SUCCESS)
break;
}
}
}
error_check:
if (retval != LIBUSB_SUCCESS) {
LOG_ERROR("libusb_handle_events() failed with %s", libusb_error_name(retval));
retval = ERROR_FAIL;