Date: Wed, 11 Jan 2006 10:31:54 +0000 (UTC) From: Gleb Smirnoff <glebius@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/dev/em if_em.c Message-ID: <200601111031.k0BAVsLj069531@repoman.freebsd.org>
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glebius 2006-01-11 10:31:54 UTC
FreeBSD src repository
Modified files: (Branch: RELENG_5)
sys/dev/em if_em.c
Log:
MFC 1.76, 1.77:
The receive function em_process_receive_interrupts() unlocks the
adapter while ether_input() processes the packet, and then locks
it back. In the meantime, em_init() may be called, either from
em_watchdog() from softclock interrupt or from the ifconfig(8)
program. The em_init() resets the card, in particular it sets
adapter->next_rx_desc_to_check to 0 and resets hardware RX Head
and Tail descriptor pointers. The loop in
em_process_receive_interrupts() does not expect these things to
change, and a mess may result.
PR: kern/87418
Submitted by: Dmitrij Tejblum <tejblum yandex-team.ru>
Revision Changes Path
1.44.2.11 +15 -86 src/sys/dev/em/if_em.c
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