From 5f6d99f138254f54356cbf682c8db22be9c96b66 Mon Sep 17 00:00:00 2001
From: David Given <dg@cowlark.com>
Date: Sat, 9 Jan 2021 00:37:37 +0100
Subject: [PATCH] Attempt that fix again.

---
 lib/usb/fluxengineusb.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/usb/fluxengineusb.cc b/lib/usb/fluxengineusb.cc
index 91672fb8..02b9a5d2 100644
--- a/lib/usb/fluxengineusb.cc
+++ b/lib/usb/fluxengineusb.cc
@@ -233,12 +233,12 @@ public:
 	Bytes read(int side, bool synced, nanoseconds_t readTime,
 	           nanoseconds_t hardSectorThreshold)
 	{
-		hardSectorThreshold += 5e5; /* Round to nearest ms. */
+		uint8_t threshold_ms = (hardSectorThreshold + 5e5) / 1e6; /* round to nearest ms */
 		struct read_frame f = {
 			.f = { .type = F_FRAME_READ_CMD, .size = sizeof(f) },
 			.side = (uint8_t) side,
 			.synced = (uint8_t) synced,
-			.hardsec_threshold_ms = (uint8_t) (hardSectorThreshold / 1e6),
+			.hardsec_threshold_ms = threshold_ms,
 		};
 		uint16_t milliseconds = readTime / 1e6;
 		((uint8_t*)&f.milliseconds)[0] = milliseconds;