[flashrom] [commit] r1626 - trunk
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Fri Nov 30 17:46:42 CET 2012
Author: stefanct
Date: Fri Nov 30 17:46:41 2012
New Revision: 1626
URL: http://flashrom.org/trac/flashrom/changeset/1626
Log:
Break endless loop in serialport_write().
serialport_write could loop endlessly when used with a seemingly valid port
that does always return 0 on writes instead of an error.
Give up after about 125 ms i.e. 250 tries with a period of 500 us.
Signed-off-by: Stefan Tauner <stefan.tauner at student.tuwien.ac.at>
Acked-by: Idwer Vollering <vidwer at gmail.com>
Modified:
trunk/serial.c
Modified: trunk/serial.c
==============================================================================
--- trunk/serial.c Thu Nov 29 23:22:04 2012 (r1625)
+++ trunk/serial.c Fri Nov 30 17:46:41 2012 (r1626)
@@ -262,6 +262,7 @@
#else
ssize_t tmp = 0;
#endif
+ unsigned int empty_writes = 250; /* results in a ca. 125ms timeout */
while (writecnt > 0) {
#ifdef _WIN32
@@ -273,9 +274,16 @@
msg_perr("Serial port write error!\n");
return 1;
}
- if (!tmp)
- msg_pdbg("Empty write\n");
- writecnt -= tmp;
+ if (!tmp) {
+ msg_pdbg2("Empty write\n");
+ empty_writes--;
+ programmer_delay(500);
+ if (empty_writes == 0) {
+ msg_perr("Serial port is unresponsive!\n");
+ return 1;
+ }
+ }
+ writecnt -= tmp;
buf += tmp;
}
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