Date: Sun, 3 Aug 2014 10:47:45 +0000 (UTC) From: Joerg Wunsch <joerg@svn.freebsd.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r269470 - head/sys/dev/usb/serial Message-ID: <53de1351.5c38.22a9a53a@svn.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: joerg Date: Sun Aug 3 10:47:45 2014 New Revision: 269470 URL: http://svnweb.freebsd.org/changeset/base/269470 Log: Avoid a divide-by-zero panic when setting the baudrate to 0. MFC after: 2 weeks Modified: head/sys/dev/usb/serial/umcs.c Modified: head/sys/dev/usb/serial/umcs.c ============================================================================== --- head/sys/dev/usb/serial/umcs.c Sun Aug 3 10:02:14 2014 (r269469) +++ head/sys/dev/usb/serial/umcs.c Sun Aug 3 10:47:45 2014 (r269470) @@ -1083,7 +1083,10 @@ umcs7840_calc_baudrate(uint32_t rate, ui for (i = 0; i < umcs7840_baudrate_divisors_len - 1 && !(rate > umcs7840_baudrate_divisors[i] && rate <= umcs7840_baudrate_divisors[i + 1]); ++i); - *divisor = umcs7840_baudrate_divisors[i + 1] / rate; + if (rate == 0) + *divisor = 1; /* XXX */ + else + *divisor = umcs7840_baudrate_divisors[i + 1] / rate; /* 0x00 .. 0x70 */ *clk = i << MCS7840_DEV_SPx_CLOCK_SHIFT; return (0);
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?53de1351.5c38.22a9a53a>