Date: Fri, 8 Aug 2014 14:56:04 +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-9@freebsd.org Subject: svn commit: r269721 - stable/9/sys/dev/usb/serial Message-ID: <53e4e504.243c.4a12602c@svn.freebsd.org>
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Author: joerg Date: Fri Aug 8 14:56:04 2014 New Revision: 269721 URL: http://svnweb.freebsd.org/changeset/base/269721 Log: MFC r269470: Avoid divide-by-zero panic when setting baudrate to 0. Modified: stable/9/sys/dev/usb/serial/umcs.c Directory Properties: stable/9/sys/ (props changed) stable/9/sys/dev/ (props changed) Modified: stable/9/sys/dev/usb/serial/umcs.c ============================================================================== --- stable/9/sys/dev/usb/serial/umcs.c Fri Aug 8 14:53:01 2014 (r269720) +++ stable/9/sys/dev/usb/serial/umcs.c Fri Aug 8 14:56:04 2014 (r269721) @@ -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);
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