Date: Fri, 8 Aug 2014 15:04:02 +0000 (UTC) From: Joerg Wunsch <joerg@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org Subject: svn commit: r269722 - stable/8/sys/dev/usb/serial Message-ID: <53e4e6e2.2a2f.5ff767c5@svn.freebsd.org>
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Author: joerg Date: Fri Aug 8 15:04:02 2014 New Revision: 269722 URL: http://svnweb.freebsd.org/changeset/base/269722 Log: MFC r269470: avoid divide-by-zero panic when setting baudrate to 0. Modified: stable/8/sys/dev/usb/serial/umcs.c Directory Properties: stable/8/sys/ (props changed) stable/8/sys/dev/ (props changed) stable/8/sys/dev/usb/ (props changed) Modified: stable/8/sys/dev/usb/serial/umcs.c ============================================================================== --- stable/8/sys/dev/usb/serial/umcs.c Fri Aug 8 14:56:04 2014 (r269721) +++ stable/8/sys/dev/usb/serial/umcs.c Fri Aug 8 15:04:02 2014 (r269722) @@ -1059,7 +1059,10 @@ 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);
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