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From: Tai-hwa Liang <avatar@FreeBSD.org>
Date: Wed, 13 Apr 2005 13:56:17 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org,
	cvs-all@FreeBSD.org
X-FreeBSD-CVS-Branch: HEAD
Subject: cvs commit: src/sys/kern tty.c
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avatar      2005-04-13 13:56:17 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             tty.c 
  Log:
  According to the comment in struct tty, t_modem is optional; hence we should
  guard against NULL t_modem entry. Otherwise, driver doesn't have t_modem
  callback implemented(such like sys/dev/usb/ucycom.c) would panic when
  someone opens the driver's associated tty device.
  
  Reviewed by:    phk, sam (mentor)
  
  Revision  Changes    Path
  1.249     +4 -2      src/sys/kern/tty.c