Date: Wed, 7 Jul 1999 14:49:16 -0700 (PDT) From: Bill Paul <wpaul@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/pci if_xl.c Message-ID: <199907072149.OAA52500@freefall.freebsd.org>
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wpaul 1999/07/07 14:49:16 PDT
Modified files:
sys/pci if_xl.c
Log:
Fix a potential race condition that can occur in xl_start(). If the NIC
clears out the transmit queue and zeroes the downlist pointer register,
but xl_txeof() isn't called before xl_start() tries to queue more packets,
xl_start() will think that the DMA is still in progress and not update
the downlist register again, thus causing packets to sit in the transmit
queue forever.
Patch provided by: Russell T Hunt <alaric@MIT.EDU>
Revision Changes Path
1.43 +5 -3 src/sys/pci/if_xl.c
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