From bb0d11cba989832c0f27c2e5b664bfdc26b98cc9 Mon Sep 17 00:00:00 2001 From: =?utf8?q?=C3=98yvind=20Harboe?= Date: Thu, 3 Mar 2011 09:14:30 +0100 Subject: [PATCH] jtag: clean up jtag_sleep, handle short sleeps correctly via usleep MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit short sleeps are handled via usleep, longer sleeps we round up to nearest ms. There was a bug in jtag_sleep() in that it would round *down* to nearest ms, thus making all <1ms sleeps 0. Found by inspection rather than symptom. Signed-off-by: Øyvind Harboe --- src/jtag/core.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/src/jtag/core.c b/src/jtag/core.c index d7e1ccec..68c12570 100644 --- a/src/jtag/core.c +++ b/src/jtag/core.c @@ -871,9 +871,16 @@ static int jtag_reset_callback(enum jtag_event event, void *priv) return ERROR_OK; } +/* sleep at least us microseconds. When we sleep more than 1000ms we + * do an alive sleep, i.e. keep GDB alive. Note that we could starve + * GDB if we slept for <1000ms many times. + */ void jtag_sleep(uint32_t us) { - alive_sleep(us/1000); + if (us < 1000) + usleep(us); + else + alive_sleep((us+999)/1000); } /* Maximum number of enabled JTAG devices we expect in the scan chain, -- 2.39.5