kanoi's old commit that fixed icarus DOA for me

kanoi-f4d2863dd674f73f23012e56ed59f0013913431d.cc

commit f4d2863dd674f73f23012e56ed59f0013913431d
Author: Kano <root@mutsumi.paige>
Date:   Fri Mar 30 18:54:14 2012 +1100

    icarus.c reduce stale by aborting work on LP

diff --git a/configure.ac b/configure.ac
index bdef687..7e18d95 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@
 ##--##--##--##--##--##--##--##--##--##--##--##--##--##--##--##--##
 m4_define([v_maj], [2])
 m4_define([v_min], [3])
-m4_define([v_mic], [1])
+m4_define([v_mic], [1q])
 ##--##--##--##--##--##--##--##--##--##--##--##--##--##--##--##--##
 m4_define([v_ver], [v_maj.v_min.v_mic])
 m4_define([lt_rev], m4_eval(v_maj + v_min))
diff --git a/icarus.c b/icarus.c
index 276cd8c..7ee4452 100644
--- a/icarus.c
+++ b/icarus.c
@@ -50,7 +50,7 @@
 #include "elist.h"
 #include "miner.h"
 
-#define ICARUS_READ_FAULT_COUNT	(8)
+#define ICARUS_READ_FAULT_COUNT	(80)
 
 struct device_api icarus_api;
 
@@ -87,7 +87,7 @@ static int icarus_open(const char *devpath)
 				ISTRIP | INLCR | IGNCR | ICRNL | IXON);
 	my_termios.c_oflag &= ~OPOST;
 	my_termios.c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN);
-	my_termios.c_cc[VTIME] = 10; /* block 1 second */
+	my_termios.c_cc[VTIME] = 1; /* block 0.1 second */
 	my_termios.c_cc[VMIN] = 0;
 	tcsetattr(serialfd, TCSANOW, &my_termios);
 
@@ -101,14 +101,15 @@ static int icarus_open(const char *devpath)
 	if (unlikely(hSerial == INVALID_HANDLE_VALUE))
 		return -1;
 
-	COMMTIMEOUTS cto = {1000, 0, 1000, 0, 1000};
+	// block 0.1 second
+	COMMTIMEOUTS cto = {100, 0, 100, 0, 100};
 	SetCommTimeouts(hSerial, &cto);
 
 	return _open_osfhandle((LONG)hSerial, 0);
 #endif
 }
 
-static int icarus_gets(unsigned char *buf, size_t bufLen, int fd)
+static int icarus_gets(unsigned char *buf, size_t bufLen, int fd, int thr_id)
 {
 	ssize_t ret = 0;
 	int rc = 0;
@@ -124,7 +125,14 @@ static int icarus_gets(unsigned char *buf, size_t bufLen, int fd)
 		rc++;
 		if (rc == ICARUS_READ_FAULT_COUNT) {
 			applog(LOG_DEBUG,
-			       "Icarus Read: No data in %d seconds", rc);
+			       "Icarus Read: No data in %.2f seconds", (float)(rc/10.0f));
+			return 1;
+		}
+
+		if (thr_id >= 0 && work_restart[thr_id].restart) {
+// TODO: change this to DEBUG
+			applog(LOG_NOTICE,
+			       "Icarus Read: Work restart at %.2f seconds", (float)(rc/10.0f));
 			return 1;
 		}
 	}
@@ -172,7 +180,7 @@ static bool icarus_detect_one(const char *devpath)
 	icarus_write(fd, ob_bin, sizeof(ob_bin));
 
 	memset(nonce_bin, 0, sizeof(nonce_bin));
-	icarus_gets(nonce_bin, sizeof(nonce_bin), fd);
+	icarus_gets(nonce_bin, sizeof(nonce_bin), fd, -1);
 
 	icarus_close(fd);
 
@@ -244,6 +252,7 @@ static bool icarus_prepare(struct thr_info *thr)
 static uint64_t icarus_scanhash(struct thr_info *thr, struct work *work,
 				__maybe_unused uint64_t max_nonce)
 {
+	const int thr_id = thr->id;
 	struct cgpu_info *icarus;
 	int fd;
 	int ret;
@@ -279,7 +288,7 @@ static uint64_t icarus_scanhash(struct thr_info *thr, struct work *work,
 
 	/* Icarus will return 8 bytes nonces or nothing */
 	memset(nonce_bin, 0, sizeof(nonce_bin));
-	ret = icarus_gets(nonce_bin, sizeof(nonce_bin), fd);
+	ret = icarus_gets(nonce_bin, sizeof(nonce_bin), fd, thr_id);
 
 	nonce_hex = bin2hex(nonce_bin, sizeof(nonce_bin));
 	if (nonce_hex) {